diff --git a/db/builder.cc b/db/builder.cc
index 67d764ad1..eac1b5fe2 100644
--- a/db/builder.cc
+++ b/db/builder.cc
@@ -221,8 +221,9 @@ Status BuildTable(
           mutable_cf_options.prefix_extractor.get(), nullptr,
           (internal_stats == nullptr) ? nullptr
                                       : internal_stats->GetFileReadHist(0),
-          false /* for_compaction */, nullptr /* arena */,
-          false /* skip_filter */, level));
+          TableReaderCaller::kFlush, /*arena=*/nullptr,
+          /*skip_filter=*/false, level, /*smallest_compaction_key=*/nullptr,
+          /*largest_compaction_key*/ nullptr));
       s = it->status();
       if (s.ok() && paranoid_file_checks) {
         for (it->SeekToFirst(); it->Valid(); it->Next()) {
diff --git a/db/compaction/compaction_job.cc b/db/compaction/compaction_job.cc
index 65efedad5..db701d19d 100644
--- a/db/compaction/compaction_job.cc
+++ b/db/compaction/compaction_job.cc
@@ -521,7 +521,7 @@ void CompactionJob::GenSubcompactionBoundaries() {
     // mutex to reduce contention
     db_mutex_->Unlock();
     uint64_t size = versions_->ApproximateSize(v, a, b, start_lvl, out_lvl + 1,
-                                               /*for_compaction*/ true);
+                                               TableReaderCaller::kCompaction);
     db_mutex_->Lock();
     ranges.emplace_back(a, b, size);
     sum += size;
@@ -646,12 +646,14 @@ Status CompactionJob::Run() {
         // to cache it here for further user reads
         InternalIterator* iter = cfd->table_cache()->NewIterator(
             ReadOptions(), env_options_, cfd->internal_comparator(),
-            *files_meta[file_idx], nullptr /* range_del_agg */,
-            prefix_extractor, nullptr,
+            *files_meta[file_idx], /*range_del_agg=*/nullptr, prefix_extractor,
+            /*table_reader_ptr=*/nullptr,
             cfd->internal_stats()->GetFileReadHist(
                 compact_->compaction->output_level()),
-            false, nullptr /* arena */, false /* skip_filters */,
-            compact_->compaction->output_level());
+            TableReaderCaller::kCompactionRefill, /*arena=*/nullptr,
+            /*skip_filters=*/false, compact_->compaction->output_level(),
+            /*smallest_compaction_key=*/nullptr,
+            /*largest_compaction_key=*/nullptr);
         auto s = iter->status();
 
         if (s.ok() && paranoid_file_checks_) {
diff --git a/db/convenience.cc b/db/convenience.cc
index c11653fb1..271217cd4 100644
--- a/db/convenience.cc
+++ b/db/convenience.cc
@@ -59,7 +59,7 @@ Status VerifySstFileChecksum(const Options& options,
   if (!s.ok()) {
     return s;
   }
-  s = table_reader->VerifyChecksum();
+  s = table_reader->VerifyChecksum(TableReaderCaller::kUserVerifyChecksum);
   return s;
 }
 
diff --git a/db/db_impl/db_impl.cc b/db/db_impl/db_impl.cc
index 6341b7685..f3fc96d8d 100644
--- a/db/db_impl/db_impl.cc
+++ b/db/db_impl/db_impl.cc
@@ -2771,7 +2771,7 @@ void DBImpl::GetApproximateSizes(ColumnFamilyHandle* column_family,
     if (include_flags & DB::SizeApproximationFlags::INCLUDE_FILES) {
       sizes[i] += versions_->ApproximateSize(
           v, k1.Encode(), k2.Encode(), /*start_level=*/0, /*end_level=*/-1,
-          /*for_compaction=*/false);
+          TableReaderCaller::kUserApproximateSize);
     }
     if (include_flags & DB::SizeApproximationFlags::INCLUDE_MEMTABLES) {
       sizes[i] += sv->mem->ApproximateStats(k1.Encode(), k2.Encode()).size;
diff --git a/db/external_sst_file_ingestion_job.cc b/db/external_sst_file_ingestion_job.cc
index 0068685b0..7e9657cc9 100644
--- a/db/external_sst_file_ingestion_job.cc
+++ b/db/external_sst_file_ingestion_job.cc
@@ -308,7 +308,8 @@ Status ExternalSstFileIngestionJob::GetIngestedFileInfo(
   }
 
   if (ingestion_options_.verify_checksums_before_ingest) {
-    status = table_reader->VerifyChecksum();
+    status =
+        table_reader->VerifyChecksum(TableReaderCaller::kExternalSSTIngestion);
   }
   if (!status.ok()) {
     return status;
@@ -368,7 +369,8 @@ Status ExternalSstFileIngestionJob::GetIngestedFileInfo(
   // updating the block cache.
   ro.fill_cache = false;
   std::unique_ptr<InternalIterator> iter(table_reader->NewIterator(
-      ro, sv->mutable_cf_options.prefix_extractor.get()));
+      ro, sv->mutable_cf_options.prefix_extractor.get(), /*arena=*/nullptr,
+      /*skip_filters=*/false, TableReaderCaller::kExternalSSTIngestion));
   std::unique_ptr<InternalIterator> range_del_iter(
       table_reader->NewRangeTombstoneIterator(ro));
 
diff --git a/db/forward_iterator.cc b/db/forward_iterator.cc
index 2633a3ff9..c875008c7 100644
--- a/db/forward_iterator.cc
+++ b/db/forward_iterator.cc
@@ -79,7 +79,11 @@ class ForwardLevelIterator : public InternalIterator {
         read_options_, *(cfd_->soptions()), cfd_->internal_comparator(),
         *files_[file_index_],
         read_options_.ignore_range_deletions ? nullptr : &range_del_agg,
-        prefix_extractor_, nullptr /* table_reader_ptr */, nullptr, false);
+        prefix_extractor_, /*table_reader_ptr=*/nullptr,
+        /*file_read_hist=*/nullptr, TableReaderCaller::kUserIterator,
+        /*arena=*/nullptr, /*skip_filters=*/false, /*level=*/-1,
+        /*smallest_compaction_key=*/nullptr,
+        /*largest_compaction_key=*/nullptr);
     file_iter_->SetPinnedItersMgr(pinned_iters_mgr_);
     valid_ = false;
     if (!range_del_agg.IsEmpty()) {
@@ -642,7 +646,12 @@ void ForwardIterator::RebuildIterators(bool refresh_sv) {
     l0_iters_.push_back(cfd_->table_cache()->NewIterator(
         read_options_, *cfd_->soptions(), cfd_->internal_comparator(), *l0,
         read_options_.ignore_range_deletions ? nullptr : &range_del_agg,
-        sv_->mutable_cf_options.prefix_extractor.get()));
+        sv_->mutable_cf_options.prefix_extractor.get(),
+        /*table_reader_ptr=*/nullptr, /*file_read_hist=*/nullptr,
+        TableReaderCaller::kUserIterator, /*arena=*/nullptr,
+        /*skip_filters=*/false, /*level=*/-1,
+        /*smallest_compaction_key=*/nullptr,
+        /*largest_compaction_key=*/nullptr));
   }
   BuildLevelIterators(vstorage);
   current_ = nullptr;
@@ -714,7 +723,12 @@ void ForwardIterator::RenewIterators() {
         read_options_, *cfd_->soptions(), cfd_->internal_comparator(),
         *l0_files_new[inew],
         read_options_.ignore_range_deletions ? nullptr : &range_del_agg,
-        svnew->mutable_cf_options.prefix_extractor.get()));
+        svnew->mutable_cf_options.prefix_extractor.get(),
+        /*table_reader_ptr=*/nullptr, /*file_read_hist=*/nullptr,
+        TableReaderCaller::kUserIterator, /*arena=*/nullptr,
+        /*skip_filters=*/false, /*level=*/-1,
+        /*smallest_compaction_key=*/nullptr,
+        /*largest_compaction_key=*/nullptr));
   }
 
   for (auto* f : l0_iters_) {
@@ -772,8 +786,13 @@ void ForwardIterator::ResetIncompleteIterators() {
     DeleteIterator(l0_iters_[i]);
     l0_iters_[i] = cfd_->table_cache()->NewIterator(
         read_options_, *cfd_->soptions(), cfd_->internal_comparator(),
-        *l0_files[i], nullptr /* range_del_agg */,
-        sv_->mutable_cf_options.prefix_extractor.get());
+        *l0_files[i], /*range_del_agg=*/nullptr,
+        sv_->mutable_cf_options.prefix_extractor.get(),
+        /*table_reader_ptr=*/nullptr, /*file_read_hist=*/nullptr,
+        TableReaderCaller::kUserIterator, /*arena=*/nullptr,
+        /*skip_filters=*/false, /*level=*/-1,
+        /*smallest_compaction_key=*/nullptr,
+        /*largest_compaction_key=*/nullptr);
     l0_iters_[i]->SetPinnedItersMgr(pinned_iters_mgr_);
   }
 
diff --git a/db/repair.cc b/db/repair.cc
index 3ae46c6e7..8967b39f3 100644
--- a/db/repair.cc
+++ b/db/repair.cc
@@ -520,7 +520,11 @@ class Repairer {
       InternalIterator* iter = table_cache_->NewIterator(
           ropts, env_options_, cfd->internal_comparator(), t->meta,
           nullptr /* range_del_agg */,
-          cfd->GetLatestMutableCFOptions()->prefix_extractor.get());
+          cfd->GetLatestMutableCFOptions()->prefix_extractor.get(),
+          /*table_reader_ptr=*/nullptr, /*file_read_hist=*/nullptr,
+          TableReaderCaller::kRepair, /*arena=*/nullptr, /*skip_filters=*/false,
+          /*level=*/-1, /*smallest_compaction_key=*/nullptr,
+          /*largest_compaction_key=*/nullptr);
       bool empty = true;
       ParsedInternalKey parsed;
       t->min_sequence = 0;
diff --git a/db/table_cache.cc b/db/table_cache.cc
index bbfaf32e0..b98d4b074 100644
--- a/db/table_cache.cc
+++ b/db/table_cache.cc
@@ -176,7 +176,7 @@ InternalIterator* TableCache::NewIterator(
     const InternalKeyComparator& icomparator, const FileMetaData& file_meta,
     RangeDelAggregator* range_del_agg, const SliceTransform* prefix_extractor,
     TableReader** table_reader_ptr, HistogramImpl* file_read_hist,
-    bool for_compaction, Arena* arena, bool skip_filters, int level,
+    TableReaderCaller caller, Arena* arena, bool skip_filters, int level,
     const InternalKey* smallest_compaction_key,
     const InternalKey* largest_compaction_key) {
   PERF_TIMER_GUARD(new_table_iterator_nanos);
@@ -187,7 +187,7 @@ InternalIterator* TableCache::NewIterator(
   if (table_reader_ptr != nullptr) {
     *table_reader_ptr = nullptr;
   }
-
+  bool for_compaction = caller == TableReaderCaller::kCompaction;
   auto& fd = file_meta.fd;
   table_reader = fd.table_reader;
   if (table_reader == nullptr) {
@@ -206,7 +206,7 @@ InternalIterator* TableCache::NewIterator(
       result = NewEmptyInternalIterator<Slice>(arena);
     } else {
       result = table_reader->NewIterator(options, prefix_extractor, arena,
-                                         skip_filters, for_compaction,
+                                         skip_filters, caller,
                                          env_options.compaction_readahead_size);
     }
     if (handle != nullptr) {
diff --git a/db/table_cache.h b/db/table_cache.h
index dbf76039a..f274337e9 100644
--- a/db/table_cache.h
+++ b/db/table_cache.h
@@ -70,12 +70,10 @@ class TableCache {
       const ReadOptions& options, const EnvOptions& toptions,
       const InternalKeyComparator& internal_comparator,
       const FileMetaData& file_meta, RangeDelAggregator* range_del_agg,
-      const SliceTransform* prefix_extractor = nullptr,
-      TableReader** table_reader_ptr = nullptr,
-      HistogramImpl* file_read_hist = nullptr, bool for_compaction = false,
-      Arena* arena = nullptr, bool skip_filters = false, int level = -1,
-      const InternalKey* smallest_compaction_key = nullptr,
-      const InternalKey* largest_compaction_key = nullptr);
+      const SliceTransform* prefix_extractor, TableReader** table_reader_ptr,
+      HistogramImpl* file_read_hist, TableReaderCaller caller, Arena* arena,
+      bool skip_filters, int level, const InternalKey* smallest_compaction_key,
+      const InternalKey* largest_compaction_key);
 
   // If a seek to internal key "k" in specified file finds an entry,
   // call get_context->SaveValue() repeatedly until
diff --git a/db/version_set.cc b/db/version_set.cc
index 9978c8cd4..8e2d21b05 100644
--- a/db/version_set.cc
+++ b/db/version_set.cc
@@ -850,14 +850,15 @@ namespace {
 
 class LevelIterator final : public InternalIterator {
  public:
-  LevelIterator(
-      TableCache* table_cache, const ReadOptions& read_options,
-      const EnvOptions& env_options, const InternalKeyComparator& icomparator,
-      const LevelFilesBrief* flevel, const SliceTransform* prefix_extractor,
-      bool should_sample, HistogramImpl* file_read_hist, bool for_compaction,
-      bool skip_filters, int level, RangeDelAggregator* range_del_agg,
-      const std::vector<AtomicCompactionUnitBoundary>* compaction_boundaries =
-          nullptr)
+  LevelIterator(TableCache* table_cache, const ReadOptions& read_options,
+                const EnvOptions& env_options,
+                const InternalKeyComparator& icomparator,
+                const LevelFilesBrief* flevel,
+                const SliceTransform* prefix_extractor, bool should_sample,
+                HistogramImpl* file_read_hist, TableReaderCaller caller,
+                bool skip_filters, int level, RangeDelAggregator* range_del_agg,
+                const std::vector<AtomicCompactionUnitBoundary>*
+                    compaction_boundaries = nullptr)
       : InternalIterator(false),
         table_cache_(table_cache),
         read_options_(read_options),
@@ -868,7 +869,7 @@ class LevelIterator final : public InternalIterator {
         prefix_extractor_(prefix_extractor),
         file_read_hist_(file_read_hist),
         should_sample_(should_sample),
-        for_compaction_(for_compaction),
+        caller_(caller),
         skip_filters_(skip_filters),
         file_index_(flevel_->num_files),
         level_(level),
@@ -957,9 +958,9 @@ class LevelIterator final : public InternalIterator {
     return table_cache_->NewIterator(
         read_options_, env_options_, icomparator_, *file_meta.file_metadata,
         range_del_agg_, prefix_extractor_,
-        nullptr /* don't need reference to table */,
-        file_read_hist_, for_compaction_, nullptr /* arena */, skip_filters_,
-        level_, smallest_compaction_key, largest_compaction_key);
+        nullptr /* don't need reference to table */, file_read_hist_, caller_,
+        /*arena=*/nullptr, skip_filters_, level_, smallest_compaction_key,
+        largest_compaction_key);
   }
 
   TableCache* table_cache_;
@@ -973,7 +974,7 @@ class LevelIterator final : public InternalIterator {
 
   HistogramImpl* file_read_hist_;
   bool should_sample_;
-  bool for_compaction_;
+  TableReaderCaller caller_;
   bool skip_filters_;
   size_t file_index_;
   int level_;
@@ -1442,10 +1443,14 @@ void Version::AddIteratorsForLevel(const ReadOptions& read_options,
     for (size_t i = 0; i < storage_info_.LevelFilesBrief(0).num_files; i++) {
       const auto& file = storage_info_.LevelFilesBrief(0).files[i];
       merge_iter_builder->AddIterator(cfd_->table_cache()->NewIterator(
-          read_options, soptions, cfd_->internal_comparator(), *file.file_metadata,
-          range_del_agg, mutable_cf_options_.prefix_extractor.get(), nullptr,
-          cfd_->internal_stats()->GetFileReadHist(0), false, arena,
-          false /* skip_filters */, 0 /* level */));
+          read_options, soptions, cfd_->internal_comparator(),
+          *file.file_metadata, range_del_agg,
+          mutable_cf_options_.prefix_extractor.get(), nullptr,
+          cfd_->internal_stats()->GetFileReadHist(0),
+          TableReaderCaller::kUserIterator, arena,
+          /*skip_filters=*/false, /*level=*/0,
+          /*smallest_compaction_key=*/nullptr,
+          /*largest_compaction_key=*/nullptr));
     }
     if (should_sample) {
       // Count ones for every L0 files. This is done per iterator creation
@@ -1466,8 +1471,8 @@ void Version::AddIteratorsForLevel(const ReadOptions& read_options,
         cfd_->internal_comparator(), &storage_info_.LevelFilesBrief(level),
         mutable_cf_options_.prefix_extractor.get(), should_sample_file_read(),
         cfd_->internal_stats()->GetFileReadHist(level),
-        false /* for_compaction */, IsFilterSkipped(level), level,
-        range_del_agg));
+        TableReaderCaller::kUserIterator, IsFilterSkipped(level), level,
+        range_del_agg, /*largest_compaction_key=*/nullptr));
   }
 }
 
@@ -1496,10 +1501,14 @@ Status Version::OverlapWithLevelIterator(const ReadOptions& read_options,
         continue;
       }
       ScopedArenaIterator iter(cfd_->table_cache()->NewIterator(
-          read_options, env_options, cfd_->internal_comparator(), *file->file_metadata,
-          &range_del_agg, mutable_cf_options_.prefix_extractor.get(), nullptr,
-          cfd_->internal_stats()->GetFileReadHist(0), false, &arena,
-          false /* skip_filters */, 0 /* level */));
+          read_options, env_options, cfd_->internal_comparator(),
+          *file->file_metadata, &range_del_agg,
+          mutable_cf_options_.prefix_extractor.get(), nullptr,
+          cfd_->internal_stats()->GetFileReadHist(0),
+          TableReaderCaller::kUserIterator, &arena,
+          /*skip_filters=*/false, /*level=*/0,
+          /*smallest_compaction_key=*/nullptr,
+          /*largest_compaction_key=*/nullptr));
       status = OverlapWithIterator(
           ucmp, smallest_user_key, largest_user_key, iter.get(), overlap);
       if (!status.ok() || *overlap) {
@@ -1513,7 +1522,7 @@ Status Version::OverlapWithLevelIterator(const ReadOptions& read_options,
         cfd_->internal_comparator(), &storage_info_.LevelFilesBrief(level),
         mutable_cf_options_.prefix_extractor.get(), should_sample_file_read(),
         cfd_->internal_stats()->GetFileReadHist(level),
-        false /* for_compaction */, IsFilterSkipped(level), level,
+        TableReaderCaller::kUserIterator, IsFilterSkipped(level), level,
         &range_del_agg));
     status = OverlapWithIterator(
         ucmp, smallest_user_key, largest_user_key, iter.get(), overlap);
@@ -4823,7 +4832,7 @@ Status VersionSet::WriteSnapshot(log::Writer* log) {
 // maintain state of where they first appear in the files.
 uint64_t VersionSet::ApproximateSize(Version* v, const Slice& start,
                                      const Slice& end, int start_level,
-                                     int end_level, bool for_compaction) {
+                                     int end_level, TableReaderCaller caller) {
   // pre-condition
   assert(v->cfd_->internal_comparator().Compare(start, end) <= 0);
 
@@ -4844,7 +4853,7 @@ uint64_t VersionSet::ApproximateSize(Version* v, const Slice& start,
 
     if (!level) {
       // level 0 data is sorted order, handle the use case explicitly
-      size += ApproximateSizeLevel0(v, files_brief, start, end, for_compaction);
+      size += ApproximateSizeLevel0(v, files_brief, start, end, caller);
       continue;
     }
 
@@ -4861,7 +4870,7 @@ uint64_t VersionSet::ApproximateSize(Version* v, const Slice& start,
     // inferred from the sorted order
     for (uint64_t i = idx_start; i < files_brief.num_files; i++) {
       uint64_t val;
-      val = ApproximateSize(v, files_brief.files[i], end, for_compaction);
+      val = ApproximateSize(v, files_brief.files[i], end, caller);
       if (!val) {
         // the files after this will not have the range
         break;
@@ -4872,7 +4881,7 @@ uint64_t VersionSet::ApproximateSize(Version* v, const Slice& start,
       if (i == idx_start) {
         // subtract the bytes needed to be scanned to get to the starting
         // key
-        val = ApproximateSize(v, files_brief.files[i], start, for_compaction);
+        val = ApproximateSize(v, files_brief.files[i], start, caller);
         assert(size >= val);
         size -= val;
       }
@@ -4886,15 +4895,15 @@ uint64_t VersionSet::ApproximateSizeLevel0(Version* v,
                                            const LevelFilesBrief& files_brief,
                                            const Slice& key_start,
                                            const Slice& key_end,
-                                           bool for_compaction) {
+                                           TableReaderCaller caller) {
   // level 0 files are not in sorted order, we need to iterate through
   // the list to compute the total bytes that require scanning
   uint64_t size = 0;
   for (size_t i = 0; i < files_brief.num_files; i++) {
     const uint64_t start =
-        ApproximateSize(v, files_brief.files[i], key_start, for_compaction);
+        ApproximateSize(v, files_brief.files[i], key_start, caller);
     const uint64_t end =
-        ApproximateSize(v, files_brief.files[i], key_end, for_compaction);
+        ApproximateSize(v, files_brief.files[i], key_end, caller);
     assert(end >= start);
     size += end - start;
   }
@@ -4902,7 +4911,8 @@ uint64_t VersionSet::ApproximateSizeLevel0(Version* v,
 }
 
 uint64_t VersionSet::ApproximateSize(Version* v, const FdWithKeyRange& f,
-                                     const Slice& key, bool for_compaction) {
+                                     const Slice& key,
+                                     TableReaderCaller caller) {
   // pre-condition
   assert(v);
 
@@ -4920,9 +4930,13 @@ uint64_t VersionSet::ApproximateSize(Version* v, const FdWithKeyRange& f,
     InternalIterator* iter = v->cfd_->table_cache()->NewIterator(
         ReadOptions(), v->env_options_, v->cfd_->internal_comparator(),
         *f.file_metadata, nullptr /* range_del_agg */,
-        v->GetMutableCFOptions().prefix_extractor.get(), &table_reader_ptr);
+        v->GetMutableCFOptions().prefix_extractor.get(), &table_reader_ptr,
+        /*file_read_hist=*/nullptr, caller,
+        /*arena=*/nullptr, /*skip_filters=*/false, /*level=*/-1,
+        /*smallest_compaction_key=*/nullptr,
+        /*largest_compaction_key=*/nullptr);
     if (table_reader_ptr != nullptr) {
-      result = table_reader_ptr->ApproximateOffsetOf(key, for_compaction);
+      result = table_reader_ptr->ApproximateOffsetOf(key, caller);
     }
     delete iter;
   }
@@ -5001,10 +5015,12 @@ InternalIterator* VersionSet::MakeInputIterator(
               read_options, env_options_compactions, cfd->internal_comparator(),
               *flevel->files[i].file_metadata, range_del_agg,
               c->mutable_cf_options()->prefix_extractor.get(),
-              nullptr /* table_reader_ptr */,
-              nullptr /* no per level latency histogram */,
-              true /* for_compaction */, nullptr /* arena */,
-              false /* skip_filters */, static_cast<int>(which) /* level */);
+              /*table_reader_ptr=*/nullptr,
+              /*file_read_hist=*/nullptr, TableReaderCaller::kCompaction,
+              /*arena=*/nullptr,
+              /*skip_filters=*/false, /*level=*/static_cast<int>(which),
+              /*smallest_compaction_key=*/nullptr,
+              /*largest_compaction_key=*/nullptr);
         }
       } else {
         // Create concatenating iterator for the files from this level
@@ -5012,10 +5028,10 @@ InternalIterator* VersionSet::MakeInputIterator(
             cfd->table_cache(), read_options, env_options_compactions,
             cfd->internal_comparator(), c->input_levels(which),
             c->mutable_cf_options()->prefix_extractor.get(),
-            false /* should_sample */,
-            nullptr /* no per level latency histogram */,
-            true /* for_compaction */, false /* skip_filters */,
-            static_cast<int>(which) /* level */, range_del_agg,
+            /*should_sample=*/false,
+            /*no per level latency histogram=*/nullptr,
+            TableReaderCaller::kCompaction, /*skip_filters=*/false,
+            /*level=*/static_cast<int>(which), range_del_agg,
             c->boundaries(which));
       }
     }
diff --git a/db/version_set.h b/db/version_set.h
index ba1b4d3e3..6b7c42881 100644
--- a/db/version_set.h
+++ b/db/version_set.h
@@ -984,7 +984,8 @@ class VersionSet {
   // in levels [start_level, end_level). If end_level == 0 it will search
   // through all non-empty levels
   uint64_t ApproximateSize(Version* v, const Slice& start, const Slice& end,
-                           int start_level, int end_level, bool for_compaction);
+                           int start_level, int end_level,
+                           TableReaderCaller caller);
 
   // Return the size of the current manifest file
   uint64_t manifest_file_size() const { return manifest_file_size_; }
@@ -1035,10 +1036,10 @@ class VersionSet {
   // ApproximateSize helper
   uint64_t ApproximateSizeLevel0(Version* v, const LevelFilesBrief& files_brief,
                                  const Slice& start, const Slice& end,
-                                 bool for_compaction);
+                                 TableReaderCaller caller);
 
   uint64_t ApproximateSize(Version* v, const FdWithKeyRange& f,
-                           const Slice& key, bool for_compaction);
+                           const Slice& key, TableReaderCaller caller);
 
   // Save current contents to *log
   Status WriteSnapshot(log::Writer* log);
diff --git a/table/block_based/block_based_table_reader.cc b/table/block_based/block_based_table_reader.cc
index 9339c3536..5b2f51500 100644
--- a/table/block_based/block_based_table_reader.cc
+++ b/table/block_based/block_based_table_reader.cc
@@ -349,7 +349,9 @@ class PartitionIndexReader : public BlockBasedTable::IndexReaderCommon {
               nullptr, kNullStats, true, index_key_includes_seq(),
               index_value_is_full()),
           false, true, /* prefix_extractor */ nullptr, BlockType::kIndex,
-          index_key_includes_seq(), index_value_is_full());
+          index_key_includes_seq(), index_value_is_full(),
+          lookup_context ? lookup_context->caller
+                         : TableReaderCaller::kUncategorized);
     }
 
     assert(it != nullptr);
@@ -365,7 +367,7 @@ class PartitionIndexReader : public BlockBasedTable::IndexReaderCommon {
 
   void CacheDependencies(bool pin) override {
     // Before read partitions, prefetch them to avoid lots of IOs
-    BlockCacheLookupContext lookup_context{BlockCacheLookupCaller::kPrefetch};
+    BlockCacheLookupContext lookup_context{TableReaderCaller::kPrefetch};
     auto rep = table()->rep_;
     IndexBlockIter biter;
     BlockHandle handle;
@@ -1075,7 +1077,7 @@ Status BlockBasedTable::Open(
   // Better not mutate rep_ after the creation. eg. internal_prefix_transform
   // raw pointer will be used to create HashIndexReader, whose reset may
   // access a dangling pointer.
-  BlockCacheLookupContext lookup_context{BlockCacheLookupCaller::kPrefetch};
+  BlockCacheLookupContext lookup_context{TableReaderCaller::kPrefetch};
   Rep* rep = new BlockBasedTable::Rep(ioptions, env_options, table_options,
                                       internal_comparator, skip_filters, level,
                                       immortal_table);
@@ -2681,7 +2683,7 @@ void BlockBasedTableIterator<TBlockIter, TValue>::InitDataBlock() {
     //   Enabled after 2 sequential IOs when ReadOptions.readahead_size == 0.
     // Explicit user requested readahead:
     //   Enabled from the very first IO when ReadOptions.readahead_size is set.
-    if (!for_compaction_) {
+    if (lookup_context_.caller != TableReaderCaller::kCompaction) {
       if (read_options_.readahead_size == 0) {
         // Implicit auto readahead
         num_file_reads_++;
@@ -2728,7 +2730,8 @@ void BlockBasedTableIterator<TBlockIter, TValue>::InitDataBlock() {
         read_options_, data_block_handle, &block_iter_, block_type_,
         key_includes_seq_, index_key_is_full_,
         /*get_context=*/nullptr, &lookup_context_, s, prefetch_buffer_.get(),
-        for_compaction_);
+        /*for_compaction=*/lookup_context_.caller ==
+            TableReaderCaller::kCompaction);
     block_iter_points_to_real_block_ = true;
   }
 }
@@ -2814,11 +2817,8 @@ void BlockBasedTableIterator<TBlockIter, TValue>::CheckOutOfBound() {
 
 InternalIterator* BlockBasedTable::NewIterator(
     const ReadOptions& read_options, const SliceTransform* prefix_extractor,
-    Arena* arena, bool skip_filters, bool for_compaction,
-    size_t compaction_readahead_size) {
-  BlockCacheLookupContext lookup_context{
-      for_compaction ? BlockCacheLookupCaller::kCompaction
-                     : BlockCacheLookupCaller::kUserIterator};
+    Arena* arena, bool skip_filters, TableReaderCaller caller, size_t compaction_readahead_size) {
+  BlockCacheLookupContext lookup_context{caller};
   bool need_upper_bound_check =
       PrefixExtractorChanged(rep_->table_properties.get(), prefix_extractor);
   if (arena == nullptr) {
@@ -2832,7 +2832,7 @@ InternalIterator* BlockBasedTable::NewIterator(
         !skip_filters && !read_options.total_order_seek &&
             prefix_extractor != nullptr,
         need_upper_bound_check, prefix_extractor, BlockType::kData,
-        true /*key_includes_seq*/, true /*index_key_is_full*/, for_compaction,
+        /*key_includes_seq=*/true, /*index_key_is_full=*/true, caller,
         compaction_readahead_size);
   } else {
     auto* mem =
@@ -2845,8 +2845,7 @@ InternalIterator* BlockBasedTable::NewIterator(
         !skip_filters && !read_options.total_order_seek &&
             prefix_extractor != nullptr,
         need_upper_bound_check, prefix_extractor, BlockType::kData,
-        true /*key_includes_seq*/, true /*index_key_is_full*/, for_compaction,
-        compaction_readahead_size);
+        /*key_includes_seq=*/true, /*index_key_is_full=*/true, caller, compaction_readahead_size);
   }
 }
 
@@ -2933,7 +2932,7 @@ Status BlockBasedTable::Get(const ReadOptions& read_options, const Slice& key,
   CachableEntry<FilterBlockReader> filter_entry;
   bool may_match;
   FilterBlockReader* filter = nullptr;
-  BlockCacheLookupContext lookup_context{BlockCacheLookupCaller::kUserGet};
+  BlockCacheLookupContext lookup_context{TableReaderCaller::kUserGet};
   {
     if (!skip_filters) {
       filter_entry = GetFilter(prefix_extractor, /*prefetch_buffer=*/nullptr,
@@ -2989,7 +2988,7 @@ Status BlockBasedTable::Get(const ReadOptions& read_options, const Slice& key,
         break;
       } else {
         BlockCacheLookupContext lookup_data_block_context{
-            BlockCacheLookupCaller::kUserGet};
+            TableReaderCaller::kUserGet};
         bool does_referenced_key_exist = false;
         DataBlockIter biter;
         uint64_t referenced_data_size = 0;
@@ -3084,7 +3083,7 @@ void BlockBasedTable::MultiGet(const ReadOptions& read_options,
                                const MultiGetRange* mget_range,
                                const SliceTransform* prefix_extractor,
                                bool skip_filters) {
-  BlockCacheLookupContext lookup_context{BlockCacheLookupCaller::kUserMGet};
+  BlockCacheLookupContext lookup_context{TableReaderCaller::kUserMultiGet};
   const bool no_io = read_options.read_tier == kBlockCacheTier;
   CachableEntry<FilterBlockReader> filter_entry;
   FilterBlockReader* filter = nullptr;
@@ -3135,7 +3134,7 @@ void BlockBasedTable::MultiGet(const ReadOptions& read_options,
         uint64_t referenced_data_size = 0;
         bool does_referenced_key_exist = false;
         BlockCacheLookupContext lookup_data_block_context(
-            BlockCacheLookupCaller::kUserMGet);
+            TableReaderCaller::kUserMultiGet);
         if (iiter->value().offset() != offset) {
           offset = iiter->value().offset();
           biter.Invalidate(Status::OK());
@@ -3244,7 +3243,7 @@ Status BlockBasedTable::Prefetch(const Slice* const begin,
   if (begin && end && comparator.Compare(*begin, *end) > 0) {
     return Status::InvalidArgument(*begin, *end);
   }
-  BlockCacheLookupContext lookup_context{BlockCacheLookupCaller::kPrefetch};
+  BlockCacheLookupContext lookup_context{TableReaderCaller::kPrefetch};
   IndexBlockIter iiter_on_stack;
   auto iiter = NewIndexIterator(ReadOptions(), /*need_upper_bound_check=*/false,
                                 &iiter_on_stack, /*get_context=*/nullptr,
@@ -3299,9 +3298,7 @@ Status BlockBasedTable::Prefetch(const Slice* const begin,
   return Status::OK();
 }
 
-Status BlockBasedTable::VerifyChecksum() {
-  // TODO(haoyu): This function is called by external sst ingestion and the
-  // verify checksum public API. We don't log its block cache accesses for now.
+Status BlockBasedTable::VerifyChecksum(TableReaderCaller caller) {
   Status s;
   // Check Meta blocks
   std::unique_ptr<Block> meta;
@@ -3317,9 +3314,10 @@ Status BlockBasedTable::VerifyChecksum() {
   }
   // Check Data blocks
   IndexBlockIter iiter_on_stack;
+  BlockCacheLookupContext context{caller};
   InternalIteratorBase<BlockHandle>* iiter = NewIndexIterator(
       ReadOptions(), /*need_upper_bound_check=*/false, &iiter_on_stack,
-      /*get_context=*/nullptr, /*lookup_contex=*/nullptr);
+      /*get_context=*/nullptr, &context);
   std::unique_ptr<InternalIteratorBase<BlockHandle>> iiter_unique_ptr;
   if (iiter != &iiter_on_stack) {
     iiter_unique_ptr =
@@ -3536,10 +3534,8 @@ Status BlockBasedTable::CreateIndexReader(
 }
 
 uint64_t BlockBasedTable::ApproximateOffsetOf(const Slice& key,
-                                              bool for_compaction) {
-  BlockCacheLookupContext context(
-      for_compaction ? BlockCacheLookupCaller::kCompaction
-                     : BlockCacheLookupCaller::kUserApproximateSize);
+                                              TableReaderCaller caller) {
+  BlockCacheLookupContext context(caller);
   std::unique_ptr<InternalIteratorBase<BlockHandle>> index_iter(
       NewIndexIterator(ReadOptions(), /*need_upper_bound_check=*/false,
                        /*input_iter=*/nullptr, /*get_context=*/nullptr,
diff --git a/table/block_based/block_based_table_reader.h b/table/block_based/block_based_table_reader.h
index be758c967..b03e67128 100644
--- a/table/block_based/block_based_table_reader.h
+++ b/table/block_based/block_based_table_reader.h
@@ -123,18 +123,13 @@ class BlockBasedTable : public TableReader {
   // The result of NewIterator() is initially invalid (caller must
   // call one of the Seek methods on the iterator before using it).
   // @param skip_filters Disables loading/accessing the filter block
-  // compaction_readahead_size: its value will only be used if for_compaction =
-  // true
-  InternalIterator* NewIterator(
-      const ReadOptions&, const SliceTransform* prefix_extractor,
-      Arena* arena = nullptr, bool skip_filters = false,
-      // TODO(haoyu) 1. External SST ingestion sets for_compaction as false. 2.
-      // Compaction also sets it to false when paranoid_file_checks is true,
-      // i.e., it will populate the block cache with blocks in the new SST
-      // files. We treat those as a user is calling iterator for now. We should
-      // differentiate the callers.
-      bool for_compaction = false,
-      size_t compaction_readahead_size = 0) override;
+  // compaction_readahead_size: its value will only be used if caller =
+  // kCompaction.
+  InternalIterator* NewIterator(const ReadOptions&,
+                                const SliceTransform* prefix_extractor,
+                                Arena* arena, bool skip_filters,
+                                TableReaderCaller caller,
+                                size_t compaction_readahead_size = 0) override;
 
   FragmentedRangeTombstoneIterator* NewRangeTombstoneIterator(
       const ReadOptions& read_options) override;
@@ -160,7 +155,8 @@ class BlockBasedTable : public TableReader {
   // bytes, and so includes effects like compression of the underlying data.
   // E.g., the approximate offset of the last key in the table will
   // be close to the file length.
-  uint64_t ApproximateOffsetOf(const Slice& key, bool for_compaction) override;
+  uint64_t ApproximateOffsetOf(const Slice& key,
+                               TableReaderCaller caller) override;
 
   bool TEST_BlockInCache(const BlockHandle& handle) const;
 
@@ -180,7 +176,7 @@ class BlockBasedTable : public TableReader {
   Status DumpTable(WritableFile* out_file,
                    const SliceTransform* prefix_extractor = nullptr) override;
 
-  Status VerifyChecksum() override;
+  Status VerifyChecksum(TableReaderCaller caller) override;
 
   void Close() override;
 
@@ -609,9 +605,8 @@ class BlockBasedTableIterator : public InternalIteratorBase<TValue> {
                           InternalIteratorBase<BlockHandle>* index_iter,
                           bool check_filter, bool need_upper_bound_check,
                           const SliceTransform* prefix_extractor,
-                          BlockType block_type, bool key_includes_seq = true,
-                          bool index_key_is_full = true,
-                          bool for_compaction = false,
+                          BlockType block_type, bool key_includes_seq,
+                          bool index_key_is_full, TableReaderCaller caller,
                           size_t compaction_readahead_size = 0)
       : InternalIteratorBase<TValue>(false),
         table_(table),
@@ -627,11 +622,8 @@ class BlockBasedTableIterator : public InternalIteratorBase<TValue> {
         block_type_(block_type),
         key_includes_seq_(key_includes_seq),
         index_key_is_full_(index_key_is_full),
-        for_compaction_(for_compaction),
-        compaction_readahead_size_(compaction_readahead_size),
-        lookup_context_(for_compaction
-                            ? BlockCacheLookupCaller::kCompaction
-                            : BlockCacheLookupCaller::kUserIterator) {}
+        lookup_context_(caller),
+        compaction_readahead_size_(compaction_readahead_size) {}
 
   ~BlockBasedTableIterator() { delete index_iter_; }
 
@@ -740,13 +732,11 @@ class BlockBasedTableIterator : public InternalIteratorBase<TValue> {
   // If the keys in the blocks over which we iterate include 8 byte sequence
   bool key_includes_seq_;
   bool index_key_is_full_;
-  // If this iterator is created for compaction
-  bool for_compaction_;
-  // Readahead size used in compaction, its value is used only if
-  // for_compaction_ = true
-  size_t compaction_readahead_size_;
   BlockHandle prev_index_value_;
   BlockCacheLookupContext lookup_context_;
+  // Readahead size used in compaction, its value is used only if
+  // lookup_context_.caller = kCompaction.
+  size_t compaction_readahead_size_;
 
   // All the below fields control iterator readahead
   static const size_t kInitAutoReadaheadSize = 8 * 1024;
diff --git a/table/block_based/partitioned_filter_block.cc b/table/block_based/partitioned_filter_block.cc
index e80085dfb..cce674415 100644
--- a/table/block_based/partitioned_filter_block.cc
+++ b/table/block_based/partitioned_filter_block.cc
@@ -277,7 +277,7 @@ size_t PartitionedFilterBlockReader::ApproximateMemoryUsage() const {
 void PartitionedFilterBlockReader::CacheDependencies(
     bool pin, const SliceTransform* prefix_extractor) {
   // Before read partitions, prefetch them to avoid lots of IOs
-  BlockCacheLookupContext lookup_context{BlockCacheLookupCaller::kPrefetch};
+  BlockCacheLookupContext lookup_context{TableReaderCaller::kPrefetch};
   IndexBlockIter biter;
   Statistics* kNullStats = nullptr;
   idx_on_fltr_blk_->NewIterator<IndexBlockIter>(
diff --git a/table/cuckoo/cuckoo_table_reader.cc b/table/cuckoo/cuckoo_table_reader.cc
index 821743608..30109ece6 100644
--- a/table/cuckoo/cuckoo_table_reader.cc
+++ b/table/cuckoo/cuckoo_table_reader.cc
@@ -377,7 +377,7 @@ Slice CuckooTableIterator::value() const {
 InternalIterator* CuckooTableReader::NewIterator(
     const ReadOptions& /*read_options*/,
     const SliceTransform* /* prefix_extractor */, Arena* arena,
-    bool /*skip_filters*/, bool /*for_compaction*/,
+    bool /*skip_filters*/, TableReaderCaller /*caller*/,
     size_t /*compaction_readahead_size*/) {
   if (!status().ok()) {
     return NewErrorInternalIterator<Slice>(
diff --git a/table/cuckoo/cuckoo_table_reader.h b/table/cuckoo/cuckoo_table_reader.h
index cdb0302bd..10db08425 100644
--- a/table/cuckoo/cuckoo_table_reader.h
+++ b/table/cuckoo/cuckoo_table_reader.h
@@ -50,10 +50,8 @@ class CuckooTableReader: public TableReader {
   // true
   InternalIterator* NewIterator(const ReadOptions&,
                                 const SliceTransform* prefix_extractor,
-                                Arena* arena = nullptr,
-                                bool skip_filters = false,
-                                bool for_compaction = false,
-                                size_t compaction_readahead_size = 0) override;
+                                Arena* arena, bool skip_filters,
+                                TableReaderCaller caller, size_t compaction_readahead_size = 0) override;
   void Prepare(const Slice& target) override;
 
   // Report an approximation of how much memory has been used.
@@ -61,7 +59,7 @@ class CuckooTableReader: public TableReader {
 
   // Following methods are not implemented for Cuckoo Table Reader
   uint64_t ApproximateOffsetOf(const Slice& /*key*/,
-                               bool /*for_compaction*/ = false) override {
+                               TableReaderCaller /*caller*/) override {
     return 0;
   }
   void SetupForCompaction() override {}
diff --git a/table/cuckoo/cuckoo_table_reader_test.cc b/table/cuckoo/cuckoo_table_reader_test.cc
index dd65ffe84..dd1557db1 100644
--- a/table/cuckoo/cuckoo_table_reader_test.cc
+++ b/table/cuckoo/cuckoo_table_reader_test.cc
@@ -146,8 +146,9 @@ class CuckooReaderTest : public testing::Test {
     CuckooTableReader reader(ioptions, std::move(file_reader), file_size, ucomp,
                              GetSliceHash);
     ASSERT_OK(reader.status());
-    InternalIterator* it =
-        reader.NewIterator(ReadOptions(), nullptr, nullptr, false);
+    InternalIterator* it = reader.NewIterator(
+        ReadOptions(), /*prefix_extractor=*/nullptr, /*arena=*/nullptr,
+        /*skip_filters=*/false, TableReaderCaller::kUncategorized);
     ASSERT_OK(it->status());
     ASSERT_TRUE(!it->Valid());
     it->SeekToFirst();
@@ -186,7 +187,9 @@ class CuckooReaderTest : public testing::Test {
     delete it;
 
     Arena arena;
-    it = reader.NewIterator(ReadOptions(), nullptr, &arena);
+    it = reader.NewIterator(ReadOptions(), /*prefix_extractor=*/nullptr, &arena,
+                            /*skip_filters=*/false,
+                            TableReaderCaller::kUncategorized);
     ASSERT_OK(it->status());
     ASSERT_TRUE(!it->Valid());
     it->Seek(keys[num_items/2]);
diff --git a/table/mock_table.cc b/table/mock_table.cc
index 4d55bf7c9..022f9a63f 100644
--- a/table/mock_table.cc
+++ b/table/mock_table.cc
@@ -34,8 +34,7 @@ stl_wrappers::KVMap MakeMockFile(
 
 InternalIterator* MockTableReader::NewIterator(
     const ReadOptions&, const SliceTransform* /* prefix_extractor */,
-    Arena* /*arena*/, bool /*skip_filters*/, bool /*for_compaction*/,
-    size_t /*compaction_readahead_size*/) {
+    Arena* /*arena*/, bool /*skip_filters*/, TableReaderCaller /*caller*/, size_t /*compaction_readahead_size*/) {
   return new MockTableIterator(table_);
 }
 
diff --git a/table/mock_table.h b/table/mock_table.h
index 6a5b5ab31..4b886e63e 100644
--- a/table/mock_table.h
+++ b/table/mock_table.h
@@ -42,17 +42,16 @@ class MockTableReader : public TableReader {
 
   InternalIterator* NewIterator(const ReadOptions&,
                                 const SliceTransform* prefix_extractor,
-                                Arena* arena = nullptr,
-                                bool skip_filters = false,
-                                bool for_compaction = false,
-                                size_t compaction_readahead_size = 0) override;
+                                Arena* arena, bool skip_filters,
+                                TableReaderCaller caller,
+                              size_t compaction_readahead_size = 0) override;
 
   Status Get(const ReadOptions& readOptions, const Slice& key,
              GetContext* get_context, const SliceTransform* prefix_extractor,
              bool skip_filters = false) override;
 
   uint64_t ApproximateOffsetOf(const Slice& /*key*/,
-                               bool /*for_compaction*/ = false) override {
+                               TableReaderCaller /*caller*/) override {
     return 0;
   }
 
diff --git a/table/plain/plain_table_reader.cc b/table/plain/plain_table_reader.cc
index 2f036e61a..f6c348fdb 100644
--- a/table/plain/plain_table_reader.cc
+++ b/table/plain/plain_table_reader.cc
@@ -196,7 +196,7 @@ void PlainTableReader::SetupForCompaction() {
 
 InternalIterator* PlainTableReader::NewIterator(
     const ReadOptions& options, const SliceTransform* /* prefix_extractor */,
-    Arena* arena, bool /*skip_filters*/, bool /*for_compaction*/,
+    Arena* arena, bool /*skip_filters*/, TableReaderCaller /*caller*/,
     size_t /*compaction_readahead_size*/) {
   bool use_prefix_seek = !IsTotalOrderMode() && !options.total_order_seek;
   if (arena == nullptr) {
@@ -616,7 +616,7 @@ Status PlainTableReader::Get(const ReadOptions& /*ro*/, const Slice& target,
 }
 
 uint64_t PlainTableReader::ApproximateOffsetOf(const Slice& /*key*/,
-                                               bool /*for_compaction*/) {
+                                               TableReaderCaller /*caller*/) {
   return 0;
 }
 
diff --git a/table/plain/plain_table_reader.h b/table/plain/plain_table_reader.h
index 7a468bdb8..f63649cac 100644
--- a/table/plain/plain_table_reader.h
+++ b/table/plain/plain_table_reader.h
@@ -82,10 +82,8 @@ class PlainTableReader: public TableReader {
   // true
   InternalIterator* NewIterator(const ReadOptions&,
                                 const SliceTransform* prefix_extractor,
-                                Arena* arena = nullptr,
-                                bool skip_filters = false,
-                                bool for_compaction = false,
-                                size_t compaction_readahead_size = 0) override;
+                                Arena* arena, bool skip_filters,
+                                TableReaderCaller caller, size_t compaction_readahead_size = 0) override;
 
   void Prepare(const Slice& target) override;
 
@@ -94,7 +92,7 @@ class PlainTableReader: public TableReader {
              bool skip_filters = false) override;
 
   uint64_t ApproximateOffsetOf(const Slice& key,
-                               bool for_compaction = false) override;
+                               TableReaderCaller caller) override;
 
   uint32_t GetIndexSize() const { return index_.GetIndexSize(); }
   void SetupForCompaction() override;
diff --git a/table/sst_file_reader.cc b/table/sst_file_reader.cc
index 54408bb50..7c3b91cc3 100644
--- a/table/sst_file_reader.cc
+++ b/table/sst_file_reader.cc
@@ -65,8 +65,9 @@ Iterator* SstFileReader::NewIterator(const ReadOptions& options) {
   auto sequence = options.snapshot != nullptr
                       ? options.snapshot->GetSequenceNumber()
                       : kMaxSequenceNumber;
-  auto internal_iter =
-      r->table_reader->NewIterator(options, r->moptions.prefix_extractor.get());
+  auto internal_iter = r->table_reader->NewIterator(
+      options, r->moptions.prefix_extractor.get(), /*arena=*/nullptr,
+      /*skip_filters=*/false, TableReaderCaller::kSSTFileReader);
   return NewDBIterator(r->options.env, options, r->ioptions, r->moptions,
                        r->ioptions.user_comparator, internal_iter, sequence,
                        r->moptions.max_sequential_skip_in_iterations,
@@ -79,7 +80,7 @@ std::shared_ptr<const TableProperties> SstFileReader::GetTableProperties()
 }
 
 Status SstFileReader::VerifyChecksum() {
-  return rep_->table_reader->VerifyChecksum();
+  return rep_->table_reader->VerifyChecksum(TableReaderCaller::kSSTFileReader);
 }
 
 }  // namespace rocksdb
diff --git a/table/table_reader.h b/table/table_reader.h
index 2904526e5..1c879cb1f 100644
--- a/table/table_reader.h
+++ b/table/table_reader.h
@@ -14,6 +14,7 @@
 #include "table/get_context.h"
 #include "table/internal_iterator.h"
 #include "table/multiget_context.h"
+#include "table/table_reader_caller.h"
 
 namespace rocksdb {
 
@@ -44,12 +45,11 @@ class TableReader {
   //        all the states but those allocated in arena.
   // skip_filters: disables checking the bloom filters even if they exist. This
   //               option is effective only for block-based table format.
-  // compaction_readahead_size: its value will only be used if for_compaction =
-  // true
-  virtual InternalIterator* NewIterator(
-      const ReadOptions&, const SliceTransform* prefix_extractor,
-      Arena* arena = nullptr, bool skip_filters = false,
-      bool for_compaction = false, size_t compaction_readahead_size = 0) = 0;
+  // compaction_readahead_size: its value will only be used if caller = kCompaction
+  virtual InternalIterator* NewIterator(const ReadOptions&,
+                                        const SliceTransform* prefix_extractor,
+                                        Arena* arena, bool skip_filters,
+                                        TableReaderCaller caller, size_t compaction_readahead_size = 0) = 0;
 
   virtual FragmentedRangeTombstoneIterator* NewRangeTombstoneIterator(
       const ReadOptions& /*read_options*/) {
@@ -63,7 +63,7 @@ class TableReader {
   // E.g., the approximate offset of the last key in the table will
   // be close to the file length.
   virtual uint64_t ApproximateOffsetOf(const Slice& key,
-                                       bool for_compaction = false) = 0;
+                                       TableReaderCaller caller) = 0;
 
   // Set up the table for Compaction. Might change some parameters with
   // posix_fadvise
@@ -122,7 +122,7 @@ class TableReader {
   }
 
   // check whether there is corruption in this db file
-  virtual Status VerifyChecksum() {
+  virtual Status VerifyChecksum(TableReaderCaller /*caller*/) {
     return Status::NotSupported("VerifyChecksum() not supported");
   }
 
diff --git a/table/table_reader_bench.cc b/table/table_reader_bench.cc
index 2ec7b2d0f..cec62df59 100644
--- a/table/table_reader_bench.cc
+++ b/table/table_reader_bench.cc
@@ -198,7 +198,9 @@ void TableReaderBenchmark(Options& opts, EnvOptions& env_options,
           Iterator* iter = nullptr;
           InternalIterator* iiter = nullptr;
           if (!through_db) {
-            iiter = table_reader->NewIterator(read_options, nullptr);
+            iiter = table_reader->NewIterator(
+                read_options, /*prefix_extractor=*/nullptr, /*arena=*/nullptr,
+                /*skip_filters=*/false, TableReaderCaller::kUncategorized);
           } else {
             iter = db->NewIterator(read_options);
           }
diff --git a/table/table_reader_caller.h b/table/table_reader_caller.h
new file mode 100644
index 000000000..90c646871
--- /dev/null
+++ b/table/table_reader_caller.h
@@ -0,0 +1,39 @@
+//  Copyright (c) 2011-present, Facebook, Inc.  All rights reserved.
+//  This source code is licensed under both the GPLv2 (found in the
+//  COPYING file in the root directory) and Apache 2.0 License
+//  (found in the LICENSE.Apache file in the root directory).
+
+#pragma once
+
+namespace rocksdb {
+// A list of callers for a table reader. It is used to trace the caller that
+// accesses on a block. This is only used for block cache tracing and analysis.
+// A user may use kUncategorized if the caller is not interesting for analysis
+// or the table reader is called in the test environment, e.g., unit test, table
+// reader benchmark, etc.
+enum TableReaderCaller : char {
+  kUserGet = 1,
+  kUserMultiGet = 2,
+  kUserIterator = 3,
+  kUserApproximateSize = 4,
+  kUserVerifyChecksum = 5,
+  kSSTDumpTool = 6,
+  kExternalSSTIngestion = 7,
+  kRepair = 8,
+  kPrefetch = 9,
+  kCompaction = 10,
+  // A compaction job may refill the block cache with blocks in the new SST
+  // files if paranoid_file_checks is true.
+  kCompactionRefill = 11,
+  // After building a table, it may load all its blocks into the block cache if
+  // paranoid_file_checks is true.
+  kFlush = 12,
+  // sst_file_reader.
+  kSSTFileReader = 13,
+  // A list of callers that are either not interesting for analysis or are
+  // calling from a test environment, e.g., unit test, benchmark, etc.
+  kUncategorized = 14,
+  // All callers should be added before kMaxBlockCacheLookupCaller.
+  kMaxBlockCacheLookupCaller
+};
+}  // namespace rocksdb
diff --git a/table/table_test.cc b/table/table_test.cc
index 8e2903684..2e2286efa 100644
--- a/table/table_test.cc
+++ b/table/table_test.cc
@@ -370,7 +370,9 @@ class TableConstructor: public Constructor {
   InternalIterator* NewIterator(
       const SliceTransform* prefix_extractor) const override {
     ReadOptions ro;
-    InternalIterator* iter = table_reader_->NewIterator(ro, prefix_extractor);
+    InternalIterator* iter = table_reader_->NewIterator(
+        ro, prefix_extractor, /*arena=*/nullptr, /*skip_filters=*/false,
+        TableReaderCaller::kUncategorized);
     if (convert_to_internal_key_) {
       return new KeyConvertingIterator(iter);
     } else {
@@ -382,9 +384,11 @@ class TableConstructor: public Constructor {
     if (convert_to_internal_key_) {
       InternalKey ikey(key, kMaxSequenceNumber, kTypeValue);
       const Slice skey = ikey.Encode();
-      return table_reader_->ApproximateOffsetOf(skey);
+      return table_reader_->ApproximateOffsetOf(
+          skey, TableReaderCaller::kUncategorized);
     }
-    return table_reader_->ApproximateOffsetOf(key);
+    return table_reader_->ApproximateOffsetOf(
+        key, TableReaderCaller::kUncategorized);
   }
 
   virtual Status Reopen(const ImmutableCFOptions& ioptions,
@@ -1538,8 +1542,9 @@ TEST_P(BlockBasedTableTest, TotalOrderSeekOnHashIndex) {
     auto* reader = c.GetTableReader();
     ReadOptions ro;
     ro.total_order_seek = true;
-    std::unique_ptr<InternalIterator> iter(
-        reader->NewIterator(ro, moptions.prefix_extractor.get()));
+    std::unique_ptr<InternalIterator> iter(reader->NewIterator(
+        ro, moptions.prefix_extractor.get(), /*arena=*/nullptr,
+        /*skip_filters=*/false, TableReaderCaller::kUncategorized));
 
     iter->Seek(InternalKey("b", 0, kTypeValue).Encode());
     ASSERT_OK(iter->status());
@@ -1597,8 +1602,9 @@ TEST_P(BlockBasedTableTest, NoopTransformSeek) {
   for (int i = 0; i < 2; ++i) {
     ReadOptions ro;
     ro.total_order_seek = (i == 0);
-    std::unique_ptr<InternalIterator> iter(
-        reader->NewIterator(ro, moptions.prefix_extractor.get()));
+    std::unique_ptr<InternalIterator> iter(reader->NewIterator(
+        ro, moptions.prefix_extractor.get(), /*arena=*/nullptr,
+        /*skip_filters=*/false, TableReaderCaller::kUncategorized));
 
     iter->Seek(key.Encode());
     ASSERT_OK(iter->status());
@@ -1635,8 +1641,9 @@ TEST_P(BlockBasedTableTest, SkipPrefixBloomFilter) {
   const MutableCFOptions new_moptions(options);
   c.Reopen(new_ioptions, new_moptions);
   auto reader = c.GetTableReader();
-  std::unique_ptr<InternalIterator> db_iter(
-      reader->NewIterator(ReadOptions(), new_moptions.prefix_extractor.get()));
+  std::unique_ptr<InternalIterator> db_iter(reader->NewIterator(
+      ReadOptions(), new_moptions.prefix_extractor.get(), /*arena=*/nullptr,
+      /*skip_filters=*/false, TableReaderCaller::kUncategorized));
 
   // Test point lookup
   // only one kv
@@ -1702,8 +1709,9 @@ void TableTest::IndexTest(BlockBasedTableOptions table_options) {
   ASSERT_EQ(5u, props->num_data_blocks);
 
   // TODO(Zhongyi): update test to use MutableCFOptions
-  std::unique_ptr<InternalIterator> index_iter(
-      reader->NewIterator(ReadOptions(), moptions.prefix_extractor.get()));
+  std::unique_ptr<InternalIterator> index_iter(reader->NewIterator(
+      ReadOptions(), moptions.prefix_extractor.get(), /*arena=*/nullptr,
+      /*skip_filters=*/false, TableReaderCaller::kUncategorized));
 
   // -- Find keys do not exist, but have common prefix.
   std::vector<std::string> prefixes = {"001", "003", "005", "007", "009"};
@@ -1819,8 +1827,9 @@ TEST_P(BlockBasedTableTest, IndexSeekOptimizationIncomplete) {
   auto reader = c.GetTableReader();
   ReadOptions ropt;
   ropt.read_tier = ReadTier::kBlockCacheTier;
-  std::unique_ptr<InternalIterator> iter(
-      reader->NewIterator(ropt, /* prefix_extractor */ nullptr));
+  std::unique_ptr<InternalIterator> iter(reader->NewIterator(
+      ropt, /*prefix_extractor=*/nullptr, /*arena=*/nullptr,
+      /*skip_filters=*/false, TableReaderCaller::kUncategorized));
 
   auto ikey = [](Slice user_key) {
     return InternalKey(user_key, 0, kTypeValue).Encode().ToString();
@@ -3136,8 +3145,9 @@ TEST_P(IndexBlockRestartIntervalTest, IndexBlockRestartInterval) {
            &kvmap);
   auto reader = c.GetTableReader();
 
-  std::unique_ptr<InternalIterator> db_iter(
-      reader->NewIterator(ReadOptions(), moptions.prefix_extractor.get()));
+  std::unique_ptr<InternalIterator> db_iter(reader->NewIterator(
+      ReadOptions(), moptions.prefix_extractor.get(), /*arena=*/nullptr,
+      /*skip_filters=*/false, TableReaderCaller::kUncategorized));
 
   // Test point lookup
   for (auto& kv : kvmap) {
@@ -3329,8 +3339,9 @@ TEST_P(BlockBasedTableTest, DISABLED_TableWithGlobalSeqno) {
                            EnvOptions(), ikc),
         std::move(file_reader), ss_rw.contents().size(), &table_reader);
 
-    return table_reader->NewIterator(ReadOptions(),
-                                     moptions.prefix_extractor.get());
+    return table_reader->NewIterator(
+        ReadOptions(), moptions.prefix_extractor.get(), /*arena=*/nullptr,
+        /*skip_filters=*/false, TableReaderCaller::kUncategorized);
   };
 
   GetVersionAndGlobalSeqno();
@@ -3501,7 +3512,8 @@ TEST_P(BlockBasedTableTest, BlockAlignTest) {
       std::move(file_reader), ss_rw.contents().size(), &table_reader));
 
   std::unique_ptr<InternalIterator> db_iter(table_reader->NewIterator(
-      ReadOptions(), moptions2.prefix_extractor.get()));
+      ReadOptions(), moptions2.prefix_extractor.get(), /*arena=*/nullptr,
+      /*skip_filters=*/false, TableReaderCaller::kUncategorized));
 
   int expected_key = 1;
   for (db_iter->SeekToFirst(); db_iter->Valid(); db_iter->Next()) {
@@ -3795,8 +3807,9 @@ TEST_P(BlockBasedTableTest, DataBlockHashIndex) {
   auto reader = c.GetTableReader();
 
   std::unique_ptr<InternalIterator> seek_iter;
-  seek_iter.reset(
-      reader->NewIterator(ReadOptions(), moptions.prefix_extractor.get()));
+  seek_iter.reset(reader->NewIterator(
+      ReadOptions(), moptions.prefix_extractor.get(), /*arena=*/nullptr,
+      /*skip_filters=*/false, TableReaderCaller::kUncategorized));
   for (int i = 0; i < 2; ++i) {
     ReadOptions ro;
     // for every kv, we seek using two method: Get() and Seek()
@@ -3877,13 +3890,15 @@ TEST_P(BlockBasedTableTest, OutOfBoundOnSeek) {
   Slice upper_bound_slice(upper_bound);
   read_opt.iterate_upper_bound = &upper_bound_slice;
   std::unique_ptr<InternalIterator> iter;
-  iter.reset(new KeyConvertingIterator(
-      reader->NewIterator(read_opt, nullptr /*prefix_extractor*/)));
+  iter.reset(new KeyConvertingIterator(reader->NewIterator(
+      read_opt, /*prefix_extractor=*/nullptr, /*arena=*/nullptr,
+      /*skip_filters=*/false, TableReaderCaller::kUncategorized)));
   iter->SeekToFirst();
   ASSERT_FALSE(iter->Valid());
   ASSERT_TRUE(iter->IsOutOfBound());
-  iter.reset(new KeyConvertingIterator(
-      reader->NewIterator(read_opt, nullptr /*prefix_extractor*/)));
+  iter.reset(new KeyConvertingIterator(reader->NewIterator(
+      read_opt, /*prefix_extractor=*/nullptr, /*arena=*/nullptr,
+      /*skip_filters=*/false, TableReaderCaller::kUncategorized)));
   iter->Seek("foo");
   ASSERT_FALSE(iter->Valid());
   ASSERT_TRUE(iter->IsOutOfBound());
@@ -3913,8 +3928,9 @@ TEST_P(BlockBasedTableTest, OutOfBoundOnNext) {
   Slice ub_slice1(ub1);
   read_opt.iterate_upper_bound = &ub_slice1;
   std::unique_ptr<InternalIterator> iter;
-  iter.reset(new KeyConvertingIterator(
-      reader->NewIterator(read_opt, nullptr /*prefix_extractor*/)));
+  iter.reset(new KeyConvertingIterator(reader->NewIterator(
+      read_opt, /*prefix_extractor=*/nullptr, /*arena=*/nullptr,
+      /*skip_filters=*/false, TableReaderCaller::kUncategorized)));
   iter->Seek("bar");
   ASSERT_TRUE(iter->Valid());
   ASSERT_EQ("bar", iter->key());
@@ -3924,8 +3940,9 @@ TEST_P(BlockBasedTableTest, OutOfBoundOnNext) {
   std::string ub2 = "foo_after";
   Slice ub_slice2(ub2);
   read_opt.iterate_upper_bound = &ub_slice2;
-  iter.reset(new KeyConvertingIterator(
-      reader->NewIterator(read_opt, nullptr /*prefix_extractor*/)));
+  iter.reset(new KeyConvertingIterator(reader->NewIterator(
+      read_opt, /*prefix_extractor=*/nullptr, /*arena=*/nullptr,
+      /*skip_filters=*/false, TableReaderCaller::kUncategorized)));
   iter->Seek("foo");
   ASSERT_TRUE(iter->Valid());
   ASSERT_EQ("foo", iter->key());
diff --git a/tools/block_cache_trace_analyzer.cc b/tools/block_cache_trace_analyzer.cc
index a8259de71..732094bf2 100644
--- a/tools/block_cache_trace_analyzer.cc
+++ b/tools/block_cache_trace_analyzer.cc
@@ -67,18 +67,36 @@ std::string block_type_to_string(TraceType type) {
   return "InvalidType";
 }
 
-std::string caller_to_string(BlockCacheLookupCaller caller) {
+std::string caller_to_string(TableReaderCaller caller) {
   switch (caller) {
     case kUserGet:
       return "Get";
-    case kUserMGet:
+    case kUserMultiGet:
       return "MultiGet";
     case kUserIterator:
       return "Iterator";
+    case kUserApproximateSize:
+      return "ApproximateSize";
+    case kUserVerifyChecksum:
+      return "VerifyChecksum";
+    case kSSTDumpTool:
+      return "SSTDumpTool";
+    case kExternalSSTIngestion:
+      return "ExternalSSTIngestion";
+    case kRepair:
+      return "Repair";
     case kPrefetch:
       return "Prefetch";
     case kCompaction:
       return "Compaction";
+    case kCompactionRefill:
+      return "CompactionRefill";
+    case kFlush:
+      return "Flush";
+    case kSSTFileReader:
+      return "SSTFileReader";
+    case kUncategorized:
+      return "Uncategorized";
     default:
       break;
   }
@@ -450,10 +468,10 @@ void BlockCacheTraceAnalyzer::PrintStatsSummary() const {
   uint64_t total_num_blocks = 0;
   uint64_t total_num_accesses = 0;
   std::map<TraceType, uint64_t> bt_num_blocks_map;
-  std::map<BlockCacheLookupCaller, uint64_t> caller_num_access_map;
-  std::map<BlockCacheLookupCaller, std::map<TraceType, uint64_t>>
+  std::map<TableReaderCaller, uint64_t> caller_num_access_map;
+  std::map<TableReaderCaller, std::map<TraceType, uint64_t>>
       caller_bt_num_access_map;
-  std::map<BlockCacheLookupCaller, std::map<uint32_t, uint64_t>>
+  std::map<TableReaderCaller, std::map<uint32_t, uint64_t>>
       caller_level_num_access_map;
   for (auto const& cf_aggregates : cf_aggregates_map_) {
     // Stats per column family.
@@ -462,12 +480,12 @@ void BlockCacheTraceAnalyzer::PrintStatsSummary() const {
     uint64_t cf_num_blocks = 0;
     std::map<TraceType, uint64_t> cf_bt_blocks;
     uint64_t cf_num_accesses = 0;
-    std::map<BlockCacheLookupCaller, uint64_t> cf_caller_num_accesses_map;
-    std::map<BlockCacheLookupCaller, std::map<uint64_t, uint64_t>>
+    std::map<TableReaderCaller, uint64_t> cf_caller_num_accesses_map;
+    std::map<TableReaderCaller, std::map<uint64_t, uint64_t>>
         cf_caller_level_num_accesses_map;
-    std::map<BlockCacheLookupCaller, std::map<uint64_t, uint64_t>>
+    std::map<TableReaderCaller, std::map<uint64_t, uint64_t>>
         cf_caller_file_num_accesses_map;
-    std::map<BlockCacheLookupCaller, std::map<TraceType, uint64_t>>
+    std::map<TableReaderCaller, std::map<TraceType, uint64_t>>
         cf_caller_bt_num_accesses_map;
     total_num_files += cf_aggregates.second.fd_aggregates_map.size();
     for (auto const& file_aggregates : cf_aggregates.second.fd_aggregates_map) {
@@ -492,7 +510,7 @@ void BlockCacheTraceAnalyzer::PrintStatsSummary() const {
           for (auto const& stats :
                block_access_info.second.caller_num_access_map) {
             // Stats per caller.
-            const BlockCacheLookupCaller caller = stats.first;
+            const TableReaderCaller caller = stats.first;
             const uint64_t num_accesses = stats.second;
             // Overall stats.
             total_num_accesses += num_accesses;
diff --git a/tools/block_cache_trace_analyzer.h b/tools/block_cache_trace_analyzer.h
index 0690d14d0..c953ecf21 100644
--- a/tools/block_cache_trace_analyzer.h
+++ b/tools/block_cache_trace_analyzer.h
@@ -72,7 +72,7 @@ struct BlockAccessInfo {
   std::map<std::string, uint64_t>
       non_exist_key_num_access_map;  // for keys do not exist in this block.
   uint64_t num_referenced_key_exist_in_block = 0;
-  std::map<BlockCacheLookupCaller, uint64_t> caller_num_access_map;
+  std::map<TableReaderCaller, uint64_t> caller_num_access_map;
 
   void AddAccess(const BlockCacheTraceRecord& access) {
     if (first_access_time == 0) {
diff --git a/tools/block_cache_trace_analyzer_test.cc b/tools/block_cache_trace_analyzer_test.cc
index df99e1f61..c361ba054 100644
--- a/tools/block_cache_trace_analyzer_test.cc
+++ b/tools/block_cache_trace_analyzer_test.cc
@@ -61,23 +61,23 @@ class BlockCacheTracerTest : public testing::Test {
     EXPECT_OK(env_->DeleteDir(test_path_));
   }
 
-  BlockCacheLookupCaller GetCaller(uint32_t key_id) {
+  TableReaderCaller GetCaller(uint32_t key_id) {
     uint32_t n = key_id % 5;
     switch (n) {
       case 0:
-        return BlockCacheLookupCaller::kPrefetch;
+        return TableReaderCaller::kPrefetch;
       case 1:
-        return BlockCacheLookupCaller::kCompaction;
+        return TableReaderCaller::kCompaction;
       case 2:
-        return BlockCacheLookupCaller::kUserGet;
+        return TableReaderCaller::kUserGet;
       case 3:
-        return BlockCacheLookupCaller::kUserMGet;
+        return TableReaderCaller::kUserMultiGet;
       case 4:
-        return BlockCacheLookupCaller::kUserIterator;
+        return TableReaderCaller::kUserIterator;
     }
     // This cannot happend.
     assert(false);
-    return BlockCacheLookupCaller::kUserGet;
+    return TableReaderCaller::kMaxBlockCacheLookupCaller;
   }
 
   void WriteBlockAccess(BlockCacheTraceWriter* writer, uint32_t from_key_id,
@@ -124,15 +124,15 @@ class BlockCacheTracerTest : public testing::Test {
     ASSERT_GT(block_access_info.first_access_time, 0);
     ASSERT_GT(block_access_info.last_access_time, 0);
     ASSERT_EQ(1, block_access_info.caller_num_access_map.size());
-    BlockCacheLookupCaller expected_caller = GetCaller(key_id);
+    TableReaderCaller expected_caller = GetCaller(key_id);
     ASSERT_TRUE(block_access_info.caller_num_access_map.find(expected_caller) !=
                 block_access_info.caller_num_access_map.end());
     ASSERT_EQ(
         1,
         block_access_info.caller_num_access_map.find(expected_caller)->second);
 
-    if ((expected_caller == BlockCacheLookupCaller::kUserGet ||
-         expected_caller == BlockCacheLookupCaller::kUserMGet) &&
+    if ((expected_caller == TableReaderCaller::kUserGet ||
+         expected_caller == TableReaderCaller::kUserMultiGet) &&
         type == TraceType::kBlockTraceDataBlock) {
       ASSERT_EQ(kNumKeysInBlock, block_access_info.num_keys);
       ASSERT_EQ(1, block_access_info.key_num_access_map.size());
diff --git a/tools/sst_dump_tool.cc b/tools/sst_dump_tool.cc
index ed5600194..260d15f30 100644
--- a/tools/sst_dump_tool.cc
+++ b/tools/sst_dump_tool.cc
@@ -143,7 +143,7 @@ Status SstFileDumper::NewTableReader(
 }
 
 Status SstFileDumper::VerifyChecksum() {
-  return table_reader_->VerifyChecksum();
+  return table_reader_->VerifyChecksum(TableReaderCaller::kSSTDumpTool);
 }
 
 Status SstFileDumper::DumpTable(const std::string& out_filename) {
@@ -173,7 +173,8 @@ uint64_t SstFileDumper::CalculateCompressedTableSize(
       TablePropertiesCollectorFactory::Context::kUnknownColumnFamily,
       dest_writer.get()));
   std::unique_ptr<InternalIterator> iter(table_reader_->NewIterator(
-      ReadOptions(), moptions_.prefix_extractor.get()));
+      ReadOptions(), moptions_.prefix_extractor.get(), /*arena=*/nullptr,
+      /*skip_filters=*/false, TableReaderCaller::kSSTDumpTool));
   for (iter->SeekToFirst(); iter->Valid(); iter->Next()) {
     if (!iter->status().ok()) {
       fputs(iter->status().ToString().c_str(), stderr);
@@ -299,7 +300,9 @@ Status SstFileDumper::ReadSequential(bool print_kv, uint64_t read_num,
   }
 
   InternalIterator* iter = table_reader_->NewIterator(
-      ReadOptions(verify_checksum_, false), moptions_.prefix_extractor.get());
+      ReadOptions(verify_checksum_, false), moptions_.prefix_extractor.get(),
+      /*arena=*/nullptr, /*skip_filters=*/false,
+      TableReaderCaller::kSSTDumpTool);
   uint64_t i = 0;
   if (has_from) {
     InternalKey ikey;
diff --git a/trace_replay/block_cache_tracer.cc b/trace_replay/block_cache_tracer.cc
index a0f0676ee..4c5ad0116 100644
--- a/trace_replay/block_cache_tracer.cc
+++ b/trace_replay/block_cache_tracer.cc
@@ -31,11 +31,11 @@ bool ShouldTrace(const Slice& block_key, const TraceOptions& trace_options) {
 const std::string BlockCacheTraceHelper::kUnknownColumnFamilyName =
     "UnknownColumnFamily";
 
-bool BlockCacheTraceHelper::ShouldTraceReferencedKey(
-    TraceType block_type, BlockCacheLookupCaller caller) {
+bool BlockCacheTraceHelper::ShouldTraceReferencedKey(TraceType block_type,
+                                                     TableReaderCaller caller) {
   return (block_type == TraceType::kBlockTraceDataBlock) &&
-         (caller == BlockCacheLookupCaller::kUserGet ||
-          caller == BlockCacheLookupCaller::kUserMGet);
+         (caller == TableReaderCaller::kUserGet ||
+          caller == TableReaderCaller::kUserMultiGet);
 }
 
 BlockCacheTraceWriter::BlockCacheTraceWriter(
@@ -182,7 +182,7 @@ Status BlockCacheTraceReader::ReadAccess(BlockCacheTraceRecord* record) {
     return Status::Incomplete(
         "Incomplete access record: Failed to read caller.");
   }
-  record->caller = static_cast<BlockCacheLookupCaller>(enc_slice[0]);
+  record->caller = static_cast<TableReaderCaller>(enc_slice[0]);
   enc_slice.remove_prefix(kCharSize);
   if (enc_slice.empty()) {
     return Status::Incomplete(
diff --git a/trace_replay/block_cache_tracer.h b/trace_replay/block_cache_tracer.h
index bf8813311..e7f38db3c 100644
--- a/trace_replay/block_cache_tracer.h
+++ b/trace_replay/block_cache_tracer.h
@@ -11,21 +11,11 @@
 #include "rocksdb/env.h"
 #include "rocksdb/options.h"
 #include "rocksdb/trace_reader_writer.h"
+#include "table/table_reader_caller.h"
 #include "trace_replay/trace_replay.h"
 
 namespace rocksdb {
 
-enum BlockCacheLookupCaller : char {
-  kUserGet = 1,
-  kUserMGet = 2,
-  kUserIterator = 3,
-  kUserApproximateSize = 4,
-  kPrefetch = 5,
-  kCompaction = 6,
-  // All callers should be added before kMaxBlockCacheLookupCaller.
-  kMaxBlockCacheLookupCaller
-};
-
 // Lookup context for tracing block cache accesses.
 // We trace block accesses at five places:
 // 1. BlockBasedTable::GetFilter
@@ -46,9 +36,8 @@ enum BlockCacheLookupCaller : char {
 // 6. BlockBasedTable::ApproximateOffsetOf. (kCompaction or
 // kUserApproximateSize).
 struct BlockCacheLookupContext {
-  BlockCacheLookupContext(const BlockCacheLookupCaller& _caller)
-      : caller(_caller) {}
-  const BlockCacheLookupCaller caller;
+BlockCacheLookupContext(const TableReaderCaller& _caller) : caller(_caller) {}
+const TableReaderCaller caller;
   // These are populated when we perform lookup/insert on block cache. The block
   // cache tracer uses these inforation when logging the block access at
   // BlockBasedTable::GET and BlockBasedTable::MultiGet.
@@ -84,8 +73,7 @@ struct BlockCacheTraceRecord {
   std::string cf_name;
   uint32_t level = 0;
   uint64_t sst_fd_number = 0;
-  BlockCacheLookupCaller caller =
-      BlockCacheLookupCaller::kMaxBlockCacheLookupCaller;
+  TableReaderCaller caller = TableReaderCaller::kMaxBlockCacheLookupCaller;
   Boolean is_cache_hit = Boolean::kFalse;
   Boolean no_insert = Boolean::kFalse;
 
@@ -100,7 +88,7 @@ struct BlockCacheTraceRecord {
   BlockCacheTraceRecord(uint64_t _access_timestamp, std::string _block_key,
                         TraceType _block_type, uint64_t _block_size,
                         uint64_t _cf_id, std::string _cf_name, uint32_t _level,
-                        uint64_t _sst_fd_number, BlockCacheLookupCaller _caller,
+                        uint64_t _sst_fd_number, TableReaderCaller _caller,
                         bool _is_cache_hit, bool _no_insert,
                         std::string _referenced_key = "",
                         uint64_t _referenced_data_size = 0,
@@ -134,7 +122,7 @@ struct BlockCacheTraceHeader {
 class BlockCacheTraceHelper {
  public:
   static bool ShouldTraceReferencedKey(TraceType block_type,
-                                       BlockCacheLookupCaller caller);
+                                       TableReaderCaller caller);
 
   static const std::string kUnknownColumnFamilyName;
 };
diff --git a/trace_replay/block_cache_tracer_test.cc b/trace_replay/block_cache_tracer_test.cc
index 95fe16b8c..44cba7bfb 100644
--- a/trace_replay/block_cache_tracer_test.cc
+++ b/trace_replay/block_cache_tracer_test.cc
@@ -37,19 +37,19 @@ class BlockCacheTracerTest : public testing::Test {
     EXPECT_OK(env_->DeleteDir(test_path_));
   }
 
-  BlockCacheLookupCaller GetCaller(uint32_t key_id) {
+  TableReaderCaller GetCaller(uint32_t key_id) {
     uint32_t n = key_id % 5;
     switch (n) {
       case 0:
-        return BlockCacheLookupCaller::kPrefetch;
+        return TableReaderCaller::kPrefetch;
       case 1:
-        return BlockCacheLookupCaller::kCompaction;
+        return TableReaderCaller::kCompaction;
       case 2:
-        return BlockCacheLookupCaller::kUserGet;
+        return TableReaderCaller::kUserGet;
       case 3:
-        return BlockCacheLookupCaller::kUserMGet;
+        return TableReaderCaller::kUserMultiGet;
       case 4:
-        return BlockCacheLookupCaller::kUserIterator;
+        return TableReaderCaller::kUserIterator;
     }
     assert(false);
   }
@@ -121,8 +121,8 @@ class BlockCacheTracerTest : public testing::Test {
       ASSERT_EQ(Boolean::kFalse, record.is_cache_hit);
       ASSERT_EQ(Boolean::kFalse, record.no_insert);
       if (block_type == TraceType::kBlockTraceDataBlock &&
-          (record.caller == BlockCacheLookupCaller::kUserGet ||
-           record.caller == BlockCacheLookupCaller::kUserMGet)) {
+          (record.caller == TableReaderCaller::kUserGet ||
+           record.caller == TableReaderCaller::kUserMultiGet)) {
         ASSERT_EQ(kRefKeyPrefix + std::to_string(key_id),
                   record.referenced_key);
         ASSERT_EQ(Boolean::kTrue, record.referenced_key_exist_in_block);