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make L0 index/filter pinned memory usage predictable (#6911)

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Summary:
Memory pinned by `pin_l0_filter_and_index_blocks_in_cache` needs to be predictable based on user config. This PR makes sure
we do not pin extra memory for large files generated by intra-L0 (see https://github.com/facebook/rocksdb/issues/6889).
Pull Request resolved: https://github.com/facebook/rocksdb/pull/6911

Test Plan: unit test

Reviewed By: siying

Differential Revision: D21835818

Pulled By: ajkr

fbshipit-source-id: a11a088549d06bed8aacc2548d266e5983f0ead4
main
Andrew Kryczka 5 years ago committed by Facebook GitHub Bot
parent 5abda3bb8b
commit 02db03af8d
20 changed files with 141 additions and 60 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 1
      HISTORY.md
  2. 4
      db/builder.cc
  3. 2
      db/compaction/compaction_job.cc
  4. 20
      db/db_compaction_test.cc
  5. 16
      db/forward_iterator.cc
  6. 3
      db/repair.cc
  7. 28
      db/table_cache.cc
  8. 11
      db/table_cache.h
  9. 14
      db/version_builder.cc
  10. 3
      db/version_builder.h
  11. 3
      db/version_edit_handler.cc
  12. 39
      db/version_set.cc
  13. 2
      db/version_set.h
  14. 11
      options/cf_options.cc
  15. 5
      options/cf_options.h
  16. 3
      table/block_based/block_based_table_factory.cc
  17. 12
      table/block_based/block_based_table_reader.cc
  18. 4
      table/block_based/block_based_table_reader.h
  19. 15
      table/table_builder.h
  20. 3
      table/table_test.cc

1
HISTORY.md
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@ -2,6 +2,7 @@
## Unreleased ## Unreleased
### Behavior Changes ### Behavior Changes
* Disable delete triggered compaction (NewCompactOnDeletionCollectorFactory) in universal compaction mode and num_levels = 1 in order to avoid a corruption bug. * Disable delete triggered compaction (NewCompactOnDeletionCollectorFactory) in universal compaction mode and num_levels = 1 in order to avoid a corruption bug.
* `pin_l0_filter_and_index_blocks_in_cache` no longer applies to L0 files larger than `1.5 * write_buffer_size` to give more predictable memory usage. Such L0 files may exist due to intra-L0 compaction, external file ingestion, or user dynamically changing `write_buffer_size` (note, however, that files that are already pinned will continue being pinned, even after such a dynamic change).
### Bug Fixes ### Bug Fixes
* Fix consistency checking error swallowing in some cases when options.force_consistency_checks = true. * Fix consistency checking error swallowing in some cases when options.force_consistency_checks = true.

4
db/builder.cc
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@ -239,7 +239,9 @@ Status BuildTable(
(internal_stats == nullptr) ? nullptr (internal_stats == nullptr) ? nullptr
: internal_stats->GetFileReadHist(0), : internal_stats->GetFileReadHist(0),
TableReaderCaller::kFlush, /*arena=*/nullptr, TableReaderCaller::kFlush, /*arena=*/nullptr,
/*skip_filter=*/false, level, /*smallest_compaction_key=*/nullptr, /*skip_filter=*/false, level,
MaxFileSizeForL0MetaPin(mutable_cf_options),
/*smallest_compaction_key=*/nullptr,
/*largest_compaction_key*/ nullptr, /*largest_compaction_key*/ nullptr,
/*allow_unprepared_value*/ false)); /*allow_unprepared_value*/ false));
s = it->status(); s = it->status();

2
db/compaction/compaction_job.cc
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@ -654,6 +654,8 @@ Status CompactionJob::Run() {
compact_->compaction->output_level()), compact_->compaction->output_level()),
TableReaderCaller::kCompactionRefill, /*arena=*/nullptr, TableReaderCaller::kCompactionRefill, /*arena=*/nullptr,
/*skip_filters=*/false, compact_->compaction->output_level(), /*skip_filters=*/false, compact_->compaction->output_level(),
MaxFileSizeForL0MetaPin(
*compact_->compaction->mutable_cf_options()),
/*smallest_compaction_key=*/nullptr, /*smallest_compaction_key=*/nullptr,
/*largest_compaction_key=*/nullptr, /*largest_compaction_key=*/nullptr,
/*allow_unprepared_value=*/false); /*allow_unprepared_value=*/false);

20
db/db_compaction_test.cc
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@ -3184,6 +3184,15 @@ TEST_P(DBCompactionTestWithParam, IntraL0Compaction) {
options.level0_file_num_compaction_trigger = 5; options.level0_file_num_compaction_trigger = 5;
options.max_background_compactions = 2; options.max_background_compactions = 2;
options.max_subcompactions = max_subcompactions_; options.max_subcompactions = max_subcompactions_;
options.statistics = ROCKSDB_NAMESPACE::CreateDBStatistics();
options.write_buffer_size = 2 << 20; // 2MB
BlockBasedTableOptions table_options;
table_options.block_cache = NewLRUCache(64 << 20); // 64MB
table_options.cache_index_and_filter_blocks = true;
table_options.pin_l0_filter_and_index_blocks_in_cache = true;
options.table_factory.reset(new BlockBasedTableFactory(table_options));
DestroyAndReopen(options); DestroyAndReopen(options);
const size_t kValueSize = 1 << 20; const size_t kValueSize = 1 << 20;
@ -3214,6 +3223,7 @@ TEST_P(DBCompactionTestWithParam, IntraL0Compaction) {
ASSERT_OK(Put(Key(i + 1), value)); ASSERT_OK(Put(Key(i + 1), value));
} }
ASSERT_OK(Flush()); ASSERT_OK(Flush());
ASSERT_EQ(i + 1, TestGetTickerCount(options, BLOCK_CACHE_INDEX_MISS));
} }
dbfull()->TEST_WaitForCompact(); dbfull()->TEST_WaitForCompact();
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->DisableProcessing(); ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->DisableProcessing();
@ -3228,6 +3238,16 @@ TEST_P(DBCompactionTestWithParam, IntraL0Compaction) {
for (int i = 0; i < 2; ++i) { for (int i = 0; i < 2; ++i) {
ASSERT_GE(level_to_files[0][i].fd.file_size, 1 << 21); ASSERT_GE(level_to_files[0][i].fd.file_size, 1 << 21);
} }
// The index/filter in the file produced by intra-L0 should not be pinned.
// That means clearing unref'd entries in block cache and re-accessing the
// file produced by intra-L0 should bump the index block miss count.
uint64_t prev_index_misses =
TestGetTickerCount(options, BLOCK_CACHE_INDEX_MISS);
table_options.block_cache->EraseUnRefEntries();
ASSERT_EQ("", Get(Key(0)));
ASSERT_EQ(prev_index_misses + 1,
TestGetTickerCount(options, BLOCK_CACHE_INDEX_MISS));
} }
TEST_P(DBCompactionTestWithParam, IntraL0CompactionDoesNotObsoleteDeletions) { TEST_P(DBCompactionTestWithParam, IntraL0CompactionDoesNotObsoleteDeletions) {

16
db/forward_iterator.cc
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@ -84,9 +84,9 @@ class ForwardLevelIterator : public InternalIterator {
prefix_extractor_, /*table_reader_ptr=*/nullptr, prefix_extractor_, /*table_reader_ptr=*/nullptr,
/*file_read_hist=*/nullptr, TableReaderCaller::kUserIterator, /*file_read_hist=*/nullptr, TableReaderCaller::kUserIterator,
/*arena=*/nullptr, /*skip_filters=*/false, /*level=*/-1, /*arena=*/nullptr, /*skip_filters=*/false, /*level=*/-1,
/*max_file_size_for_l0_meta_pin=*/0,
/*smallest_compaction_key=*/nullptr, /*smallest_compaction_key=*/nullptr,
/*largest_compaction_key=*/nullptr, /*largest_compaction_key=*/nullptr, allow_unprepared_value_);
allow_unprepared_value_);
file_iter_->SetPinnedItersMgr(pinned_iters_mgr_); file_iter_->SetPinnedItersMgr(pinned_iters_mgr_);
valid_ = false; valid_ = false;
if (!range_del_agg.IsEmpty()) { if (!range_del_agg.IsEmpty()) {
@ -686,9 +686,9 @@ void ForwardIterator::RebuildIterators(bool refresh_sv) {
/*table_reader_ptr=*/nullptr, /*file_read_hist=*/nullptr, /*table_reader_ptr=*/nullptr, /*file_read_hist=*/nullptr,
TableReaderCaller::kUserIterator, /*arena=*/nullptr, TableReaderCaller::kUserIterator, /*arena=*/nullptr,
/*skip_filters=*/false, /*level=*/-1, /*skip_filters=*/false, /*level=*/-1,
MaxFileSizeForL0MetaPin(sv_->mutable_cf_options),
/*smallest_compaction_key=*/nullptr, /*smallest_compaction_key=*/nullptr,
/*largest_compaction_key=*/nullptr, /*largest_compaction_key=*/nullptr, allow_unprepared_value_));
allow_unprepared_value_));
} }
BuildLevelIterators(vstorage); BuildLevelIterators(vstorage);
current_ = nullptr; current_ = nullptr;
@ -764,9 +764,9 @@ void ForwardIterator::RenewIterators() {
/*table_reader_ptr=*/nullptr, /*file_read_hist=*/nullptr, /*table_reader_ptr=*/nullptr, /*file_read_hist=*/nullptr,
TableReaderCaller::kUserIterator, /*arena=*/nullptr, TableReaderCaller::kUserIterator, /*arena=*/nullptr,
/*skip_filters=*/false, /*level=*/-1, /*skip_filters=*/false, /*level=*/-1,
MaxFileSizeForL0MetaPin(svnew->mutable_cf_options),
/*smallest_compaction_key=*/nullptr, /*smallest_compaction_key=*/nullptr,
/*largest_compaction_key=*/nullptr, /*largest_compaction_key=*/nullptr, allow_unprepared_value_));
allow_unprepared_value_));
} }
for (auto* f : l0_iters_) { for (auto* f : l0_iters_) {
@ -830,9 +830,9 @@ void ForwardIterator::ResetIncompleteIterators() {
/*table_reader_ptr=*/nullptr, /*file_read_hist=*/nullptr, /*table_reader_ptr=*/nullptr, /*file_read_hist=*/nullptr,
TableReaderCaller::kUserIterator, /*arena=*/nullptr, TableReaderCaller::kUserIterator, /*arena=*/nullptr,
/*skip_filters=*/false, /*level=*/-1, /*skip_filters=*/false, /*level=*/-1,
MaxFileSizeForL0MetaPin(sv_->mutable_cf_options),
/*smallest_compaction_key=*/nullptr, /*smallest_compaction_key=*/nullptr,
/*largest_compaction_key=*/nullptr, /*largest_compaction_key=*/nullptr, allow_unprepared_value_);
allow_unprepared_value_);
l0_iters_[i]->SetPinnedItersMgr(pinned_iters_mgr_); l0_iters_[i]->SetPinnedItersMgr(pinned_iters_mgr_);
} }

3
db/repair.cc
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@ -528,7 +528,8 @@ class Repairer {
cfd->GetLatestMutableCFOptions()->prefix_extractor.get(), cfd->GetLatestMutableCFOptions()->prefix_extractor.get(),
/*table_reader_ptr=*/nullptr, /*file_read_hist=*/nullptr, /*table_reader_ptr=*/nullptr, /*file_read_hist=*/nullptr,
TableReaderCaller::kRepair, /*arena=*/nullptr, /*skip_filters=*/false, TableReaderCaller::kRepair, /*arena=*/nullptr, /*skip_filters=*/false,
/*level=*/-1, /*smallest_compaction_key=*/nullptr, /*level=*/-1, /*max_file_size_for_l0_meta_pin=*/0,
/*smallest_compaction_key=*/nullptr,
/*largest_compaction_key=*/nullptr, /*largest_compaction_key=*/nullptr,
/*allow_unprepared_value=*/false); /*allow_unprepared_value=*/false);
ParsedInternalKey parsed; ParsedInternalKey parsed;

28
db/table_cache.cc
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@ -97,7 +97,8 @@ Status TableCache::GetTableReader(
bool sequential_mode, bool record_read_stats, HistogramImpl* file_read_hist, bool sequential_mode, bool record_read_stats, HistogramImpl* file_read_hist,
std::unique_ptr<TableReader>* table_reader, std::unique_ptr<TableReader>* table_reader,
const SliceTransform* prefix_extractor, bool skip_filters, int level, const SliceTransform* prefix_extractor, bool skip_filters, int level,
bool prefetch_index_and_filter_in_cache) { bool prefetch_index_and_filter_in_cache,
size_t max_file_size_for_l0_meta_pin) {
std::string fname = std::string fname =
TableFileName(ioptions_.cf_paths, fd.GetNumber(), fd.GetPathId()); TableFileName(ioptions_.cf_paths, fd.GetNumber(), fd.GetPathId());
std::unique_ptr<FSRandomAccessFile> file; std::unique_ptr<FSRandomAccessFile> file;
@ -124,7 +125,8 @@ Status TableCache::GetTableReader(
TableReaderOptions(ioptions_, prefix_extractor, file_options, TableReaderOptions(ioptions_, prefix_extractor, file_options,
internal_comparator, skip_filters, immortal_tables_, internal_comparator, skip_filters, immortal_tables_,
false /* force_direct_prefetch */, level, false /* force_direct_prefetch */, level,
fd.largest_seqno, block_cache_tracer_), fd.largest_seqno, block_cache_tracer_,
max_file_size_for_l0_meta_pin),
std::move(file_reader), fd.GetFileSize(), table_reader, std::move(file_reader), fd.GetFileSize(), table_reader,
prefetch_index_and_filter_in_cache); prefetch_index_and_filter_in_cache);
TEST_SYNC_POINT("TableCache::GetTableReader:0"); TEST_SYNC_POINT("TableCache::GetTableReader:0");
@ -145,8 +147,8 @@ Status TableCache::FindTable(const FileOptions& file_options,
const SliceTransform* prefix_extractor, const SliceTransform* prefix_extractor,
const bool no_io, bool record_read_stats, const bool no_io, bool record_read_stats,
HistogramImpl* file_read_hist, bool skip_filters, HistogramImpl* file_read_hist, bool skip_filters,
int level, int level, bool prefetch_index_and_filter_in_cache,
bool prefetch_index_and_filter_in_cache) { size_t max_file_size_for_l0_meta_pin) {
PERF_TIMER_GUARD_WITH_ENV(find_table_nanos, ioptions_.env); PERF_TIMER_GUARD_WITH_ENV(find_table_nanos, ioptions_.env);
Status s; Status s;
uint64_t number = fd.GetNumber(); uint64_t number = fd.GetNumber();
@ -170,7 +172,8 @@ Status TableCache::FindTable(const FileOptions& file_options,
s = GetTableReader(file_options, internal_comparator, fd, s = GetTableReader(file_options, internal_comparator, fd,
false /* sequential mode */, record_read_stats, false /* sequential mode */, record_read_stats,
file_read_hist, &table_reader, prefix_extractor, file_read_hist, &table_reader, prefix_extractor,
skip_filters, level, prefetch_index_and_filter_in_cache); skip_filters, level, prefetch_index_and_filter_in_cache,
max_file_size_for_l0_meta_pin);
if (!s.ok()) { if (!s.ok()) {
assert(table_reader == nullptr); assert(table_reader == nullptr);
RecordTick(ioptions_.statistics, NO_FILE_ERRORS); RecordTick(ioptions_.statistics, NO_FILE_ERRORS);
@ -194,6 +197,7 @@ InternalIterator* TableCache::NewIterator(
RangeDelAggregator* range_del_agg, const SliceTransform* prefix_extractor, RangeDelAggregator* range_del_agg, const SliceTransform* prefix_extractor,
TableReader** table_reader_ptr, HistogramImpl* file_read_hist, TableReader** table_reader_ptr, HistogramImpl* file_read_hist,
TableReaderCaller caller, Arena* arena, bool skip_filters, int level, TableReaderCaller caller, Arena* arena, bool skip_filters, int level,
size_t max_file_size_for_l0_meta_pin,
const InternalKey* smallest_compaction_key, const InternalKey* smallest_compaction_key,
const InternalKey* largest_compaction_key, bool allow_unprepared_value) { const InternalKey* largest_compaction_key, bool allow_unprepared_value) {
PERF_TIMER_GUARD(new_table_iterator_nanos); PERF_TIMER_GUARD(new_table_iterator_nanos);
@ -211,7 +215,9 @@ InternalIterator* TableCache::NewIterator(
s = FindTable(file_options, icomparator, fd, &handle, prefix_extractor, s = FindTable(file_options, icomparator, fd, &handle, prefix_extractor,
options.read_tier == kBlockCacheTier /* no_io */, options.read_tier == kBlockCacheTier /* no_io */,
!for_compaction /* record_read_stats */, file_read_hist, !for_compaction /* record_read_stats */, file_read_hist,
skip_filters, level); skip_filters, level,
true /* prefetch_index_and_filter_in_cache */,
max_file_size_for_l0_meta_pin);
if (s.ok()) { if (s.ok()) {
table_reader = GetTableReaderFromHandle(handle); table_reader = GetTableReaderFromHandle(handle);
} }
@ -372,7 +378,7 @@ Status TableCache::Get(const ReadOptions& options,
GetContext* get_context, GetContext* get_context,
const SliceTransform* prefix_extractor, const SliceTransform* prefix_extractor,
HistogramImpl* file_read_hist, bool skip_filters, HistogramImpl* file_read_hist, bool skip_filters,
int level) { int level, size_t max_file_size_for_l0_meta_pin) {
auto& fd = file_meta.fd; auto& fd = file_meta.fd;
std::string* row_cache_entry = nullptr; std::string* row_cache_entry = nullptr;
bool done = false; bool done = false;
@ -397,10 +403,12 @@ Status TableCache::Get(const ReadOptions& options,
Cache::Handle* handle = nullptr; Cache::Handle* handle = nullptr;
if (!done && s.ok()) { if (!done && s.ok()) {
if (t == nullptr) { if (t == nullptr) {
s = FindTable( s = FindTable(file_options_, internal_comparator, fd, &handle,
file_options_, internal_comparator, fd, &handle, prefix_extractor, prefix_extractor,
options.read_tier == kBlockCacheTier /* no_io */, options.read_tier == kBlockCacheTier /* no_io */,
true /* record_read_stats */, file_read_hist, skip_filters, level); true /* record_read_stats */, file_read_hist, skip_filters,
level, true /* prefetch_index_and_filter_in_cache */,
max_file_size_for_l0_meta_pin);
if (s.ok()) { if (s.ok()) {
t = GetTableReaderFromHandle(handle); t = GetTableReaderFromHandle(handle);
} }

11
db/table_cache.h
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@ -72,7 +72,8 @@ class TableCache {
const FileMetaData& file_meta, RangeDelAggregator* range_del_agg, const FileMetaData& file_meta, RangeDelAggregator* range_del_agg,
const SliceTransform* prefix_extractor, TableReader** table_reader_ptr, const SliceTransform* prefix_extractor, TableReader** table_reader_ptr,
HistogramImpl* file_read_hist, TableReaderCaller caller, Arena* arena, HistogramImpl* file_read_hist, TableReaderCaller caller, Arena* arena,
bool skip_filters, int level, const InternalKey* smallest_compaction_key, bool skip_filters, int level, size_t max_file_size_for_l0_meta_pin,
const InternalKey* smallest_compaction_key,
const InternalKey* largest_compaction_key, bool allow_unprepared_value); const InternalKey* largest_compaction_key, bool allow_unprepared_value);
// If a seek to internal key "k" in specified file finds an entry, // If a seek to internal key "k" in specified file finds an entry,
@ -91,7 +92,7 @@ class TableCache {
GetContext* get_context, GetContext* get_context,
const SliceTransform* prefix_extractor = nullptr, const SliceTransform* prefix_extractor = nullptr,
HistogramImpl* file_read_hist = nullptr, bool skip_filters = false, HistogramImpl* file_read_hist = nullptr, bool skip_filters = false,
int level = -1); int level = -1, size_t max_file_size_for_l0_meta_pin = 0);
// Return the range delete tombstone iterator of the file specified by // Return the range delete tombstone iterator of the file specified by
// `file_meta`. // `file_meta`.
@ -135,7 +136,8 @@ class TableCache {
const bool no_io = false, bool record_read_stats = true, const bool no_io = false, bool record_read_stats = true,
HistogramImpl* file_read_hist = nullptr, HistogramImpl* file_read_hist = nullptr,
bool skip_filters = false, int level = -1, bool skip_filters = false, int level = -1,
bool prefetch_index_and_filter_in_cache = true); bool prefetch_index_and_filter_in_cache = true,
size_t max_file_size_for_l0_meta_pin = 0);
// Get TableReader from a cache handle. // Get TableReader from a cache handle.
TableReader* GetTableReaderFromHandle(Cache::Handle* handle); TableReader* GetTableReaderFromHandle(Cache::Handle* handle);
@ -200,7 +202,8 @@ class TableCache {
std::unique_ptr<TableReader>* table_reader, std::unique_ptr<TableReader>* table_reader,
const SliceTransform* prefix_extractor = nullptr, const SliceTransform* prefix_extractor = nullptr,
bool skip_filters = false, int level = -1, bool skip_filters = false, int level = -1,
bool prefetch_index_and_filter_in_cache = true); bool prefetch_index_and_filter_in_cache = true,
size_t max_file_size_for_l0_meta_pin = 0);
// Create a key prefix for looking up the row cache. The prefix is of the // Create a key prefix for looking up the row cache. The prefix is of the
// format row_cache_id + fd_number + seq_no. Later, the user key can be // format row_cache_id + fd_number + seq_no. Later, the user key can be

14
db/version_builder.cc
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@ -754,7 +754,8 @@ class VersionBuilder::Rep {
Status LoadTableHandlers(InternalStats* internal_stats, int max_threads, Status LoadTableHandlers(InternalStats* internal_stats, int max_threads,
bool prefetch_index_and_filter_in_cache, bool prefetch_index_and_filter_in_cache,
bool is_initial_load, bool is_initial_load,
const SliceTransform* prefix_extractor) { const SliceTransform* prefix_extractor,
size_t max_file_size_for_l0_meta_pin) {
assert(table_cache_ != nullptr); assert(table_cache_ != nullptr);
size_t table_cache_capacity = table_cache_->get_cache()->GetCapacity(); size_t table_cache_capacity = table_cache_->get_cache()->GetCapacity();
@ -823,7 +824,7 @@ class VersionBuilder::Rep {
file_meta->fd, &file_meta->table_reader_handle, prefix_extractor, file_meta->fd, &file_meta->table_reader_handle, prefix_extractor,
false /*no_io */, true /* record_read_stats */, false /*no_io */, true /* record_read_stats */,
internal_stats->GetFileReadHist(level), false, level, internal_stats->GetFileReadHist(level), false, level,
prefetch_index_and_filter_in_cache); prefetch_index_and_filter_in_cache, max_file_size_for_l0_meta_pin);
if (file_meta->table_reader_handle != nullptr) { if (file_meta->table_reader_handle != nullptr) {
// Load table_reader // Load table_reader
file_meta->fd.table_reader = table_cache_->GetTableReaderFromHandle( file_meta->fd.table_reader = table_cache_->GetTableReaderFromHandle(
@ -882,10 +883,11 @@ Status VersionBuilder::SaveTo(VersionStorageInfo* vstorage) {
Status VersionBuilder::LoadTableHandlers( Status VersionBuilder::LoadTableHandlers(
InternalStats* internal_stats, int max_threads, InternalStats* internal_stats, int max_threads,
bool prefetch_index_and_filter_in_cache, bool is_initial_load, bool prefetch_index_and_filter_in_cache, bool is_initial_load,
const SliceTransform* prefix_extractor) { const SliceTransform* prefix_extractor,
return rep_->LoadTableHandlers(internal_stats, max_threads, size_t max_file_size_for_l0_meta_pin) {
prefetch_index_and_filter_in_cache, return rep_->LoadTableHandlers(
is_initial_load, prefix_extractor); internal_stats, max_threads, prefetch_index_and_filter_in_cache,
is_initial_load, prefix_extractor, max_file_size_for_l0_meta_pin);
} }
BaseReferencedVersionBuilder::BaseReferencedVersionBuilder( BaseReferencedVersionBuilder::BaseReferencedVersionBuilder(

3
db/version_builder.h
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@ -42,7 +42,8 @@ class VersionBuilder {
Status LoadTableHandlers(InternalStats* internal_stats, int max_threads, Status LoadTableHandlers(InternalStats* internal_stats, int max_threads,
bool prefetch_index_and_filter_in_cache, bool prefetch_index_and_filter_in_cache,
bool is_initial_load, bool is_initial_load,
const SliceTransform* prefix_extractor); const SliceTransform* prefix_extractor,
size_t max_file_size_for_l0_meta_pin);
private: private:
class Rep; class Rep;

3
db/version_edit_handler.cc
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@ -414,7 +414,8 @@ Status VersionEditHandler::LoadTables(ColumnFamilyData* cfd,
cfd->internal_stats(), cfd->internal_stats(),
version_set_->db_options_->max_file_opening_threads, version_set_->db_options_->max_file_opening_threads,
prefetch_index_and_filter_in_cache, is_initial_load, prefetch_index_and_filter_in_cache, is_initial_load,
cfd->GetLatestMutableCFOptions()->prefix_extractor.get()); cfd->GetLatestMutableCFOptions()->prefix_extractor.get(),
MaxFileSizeForL0MetaPin(*cfd->GetLatestMutableCFOptions()));
if ((s.IsPathNotFound() || s.IsCorruption()) && if ((s.IsPathNotFound() || s.IsCorruption()) &&
no_error_if_table_files_missing_) { no_error_if_table_files_missing_) {
s = Status::OK(); s = Status::OK();

39
db/version_set.cc
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@ -1004,7 +1004,8 @@ class LevelIterator final : public InternalIterator {
read_options_, file_options_, icomparator_, *file_meta.file_metadata, read_options_, file_options_, icomparator_, *file_meta.file_metadata,
range_del_agg_, prefix_extractor_, range_del_agg_, prefix_extractor_,
nullptr /* don't need reference to table */, file_read_hist_, caller_, nullptr /* don't need reference to table */, file_read_hist_, caller_,
/*arena=*/nullptr, skip_filters_, level_, smallest_compaction_key, /*arena=*/nullptr, skip_filters_, level_,
/*max_file_size_for_l0_meta_pin=*/0, smallest_compaction_key,
largest_compaction_key, allow_unprepared_value_); largest_compaction_key, allow_unprepared_value_);
} }
@ -1599,10 +1600,9 @@ void Version::AddIteratorsForLevel(const ReadOptions& read_options,
mutable_cf_options_.prefix_extractor.get(), nullptr, mutable_cf_options_.prefix_extractor.get(), nullptr,
cfd_->internal_stats()->GetFileReadHist(0), cfd_->internal_stats()->GetFileReadHist(0),
TableReaderCaller::kUserIterator, arena, TableReaderCaller::kUserIterator, arena,
/*skip_filters=*/false, /*level=*/0, /*skip_filters=*/false, /*level=*/0, max_file_size_for_l0_meta_pin_,
/*smallest_compaction_key=*/nullptr, /*smallest_compaction_key=*/nullptr,
/*largest_compaction_key=*/nullptr, /*largest_compaction_key=*/nullptr, allow_unprepared_value));
allow_unprepared_value));
} }
if (should_sample) { if (should_sample) {
// Count ones for every L0 files. This is done per iterator creation // Count ones for every L0 files. This is done per iterator creation
@ -1624,8 +1624,8 @@ void Version::AddIteratorsForLevel(const ReadOptions& read_options,
mutable_cf_options_.prefix_extractor.get(), should_sample_file_read(), mutable_cf_options_.prefix_extractor.get(), should_sample_file_read(),
cfd_->internal_stats()->GetFileReadHist(level), cfd_->internal_stats()->GetFileReadHist(level),
TableReaderCaller::kUserIterator, IsFilterSkipped(level), level, TableReaderCaller::kUserIterator, IsFilterSkipped(level), level,
range_del_agg, /*largest_compaction_key=*/nullptr, range_del_agg,
allow_unprepared_value)); /*compaction_boundaries=*/nullptr, allow_unprepared_value));
} }
} }
@ -1659,7 +1659,7 @@ Status Version::OverlapWithLevelIterator(const ReadOptions& read_options,
mutable_cf_options_.prefix_extractor.get(), nullptr, mutable_cf_options_.prefix_extractor.get(), nullptr,
cfd_->internal_stats()->GetFileReadHist(0), cfd_->internal_stats()->GetFileReadHist(0),
TableReaderCaller::kUserIterator, &arena, TableReaderCaller::kUserIterator, &arena,
/*skip_filters=*/false, /*level=*/0, /*skip_filters=*/false, /*level=*/0, max_file_size_for_l0_meta_pin_,
/*smallest_compaction_key=*/nullptr, /*smallest_compaction_key=*/nullptr,
/*largest_compaction_key=*/nullptr, /*largest_compaction_key=*/nullptr,
/*allow_unprepared_value=*/false)); /*allow_unprepared_value=*/false));
@ -1763,6 +1763,8 @@ Version::Version(ColumnFamilyData* column_family_data, VersionSet* vset,
refs_(0), refs_(0),
file_options_(file_opt), file_options_(file_opt),
mutable_cf_options_(mutable_cf_options), mutable_cf_options_(mutable_cf_options),
max_file_size_for_l0_meta_pin_(
MaxFileSizeForL0MetaPin(mutable_cf_options_)),
version_number_(version_number) {} version_number_(version_number) {}
void Version::Get(const ReadOptions& read_options, const LookupKey& k, void Version::Get(const ReadOptions& read_options, const LookupKey& k,
@ -1826,7 +1828,7 @@ void Version::Get(const ReadOptions& read_options, const LookupKey& k,
cfd_->internal_stats()->GetFileReadHist(fp.GetHitFileLevel()), cfd_->internal_stats()->GetFileReadHist(fp.GetHitFileLevel()),
IsFilterSkipped(static_cast<int>(fp.GetHitFileLevel()), IsFilterSkipped(static_cast<int>(fp.GetHitFileLevel()),
fp.IsHitFileLastInLevel()), fp.IsHitFileLastInLevel()),
fp.GetHitFileLevel()); fp.GetHitFileLevel(), max_file_size_for_l0_meta_pin_);
// TODO: examine the behavior for corrupted key // TODO: examine the behavior for corrupted key
if (timer_enabled) { if (timer_enabled) {
PERF_COUNTER_BY_LEVEL_ADD(get_from_table_nanos, timer.ElapsedNanos(), PERF_COUNTER_BY_LEVEL_ADD(get_from_table_nanos, timer.ElapsedNanos(),
@ -3922,7 +3924,8 @@ Status VersionSet::ProcessManifestWrites(
cfd->internal_stats(), 1 /* max_threads */, cfd->internal_stats(), 1 /* max_threads */,
true /* prefetch_index_and_filter_in_cache */, true /* prefetch_index_and_filter_in_cache */,
false /* is_initial_load */, false /* is_initial_load */,
mutable_cf_options_ptrs[i]->prefix_extractor.get()); mutable_cf_options_ptrs[i]->prefix_extractor.get(),
MaxFileSizeForL0MetaPin(*mutable_cf_options_ptrs[i]));
if (!s.ok()) { if (!s.ok()) {
if (db_options_->paranoid_checks) { if (db_options_->paranoid_checks) {
break; break;
@ -4649,7 +4652,8 @@ Status VersionSet::Recover(
cfd->internal_stats(), db_options_->max_file_opening_threads, cfd->internal_stats(), db_options_->max_file_opening_threads,
false /* prefetch_index_and_filter_in_cache */, false /* prefetch_index_and_filter_in_cache */,
true /* is_initial_load */, true /* is_initial_load */,
cfd->GetLatestMutableCFOptions()->prefix_extractor.get()); cfd->GetLatestMutableCFOptions()->prefix_extractor.get(),
MaxFileSizeForL0MetaPin(*cfd->GetLatestMutableCFOptions()));
if (!s.ok()) { if (!s.ok()) {
if (db_options_->paranoid_checks) { if (db_options_->paranoid_checks) {
return s; return s;
@ -5686,13 +5690,14 @@ InternalIterator* VersionSet::MakeInputIterator(
for (size_t i = 0; i < flevel->num_files; i++) { for (size_t i = 0; i < flevel->num_files; i++) {
list[num++] = cfd->table_cache()->NewIterator( list[num++] = cfd->table_cache()->NewIterator(
read_options, file_options_compactions, read_options, file_options_compactions,
cfd->internal_comparator(), cfd->internal_comparator(), *flevel->files[i].file_metadata,
*flevel->files[i].file_metadata, range_del_agg, range_del_agg, c->mutable_cf_options()->prefix_extractor.get(),
c->mutable_cf_options()->prefix_extractor.get(),
/*table_reader_ptr=*/nullptr, /*table_reader_ptr=*/nullptr,
/*file_read_hist=*/nullptr, TableReaderCaller::kCompaction, /*file_read_hist=*/nullptr, TableReaderCaller::kCompaction,
/*arena=*/nullptr, /*arena=*/nullptr,
/*skip_filters=*/false, /*level=*/static_cast<int>(c->level(which)), /*skip_filters=*/false,
/*level=*/static_cast<int>(c->level(which)),
MaxFileSizeForL0MetaPin(*c->mutable_cf_options()),
/*smallest_compaction_key=*/nullptr, /*smallest_compaction_key=*/nullptr,
/*largest_compaction_key=*/nullptr, /*largest_compaction_key=*/nullptr,
/*allow_unprepared_value=*/false); /*allow_unprepared_value=*/false);
@ -6023,7 +6028,8 @@ Status ReactiveVersionSet::Recover(
cfd->internal_stats(), db_options_->max_file_opening_threads, cfd->internal_stats(), db_options_->max_file_opening_threads,
false /* prefetch_index_and_filter_in_cache */, false /* prefetch_index_and_filter_in_cache */,
true /* is_initial_load */, true /* is_initial_load */,
cfd->GetLatestMutableCFOptions()->prefix_extractor.get()); cfd->GetLatestMutableCFOptions()->prefix_extractor.get(),
MaxFileSizeForL0MetaPin(*cfd->GetLatestMutableCFOptions()));
if (!s.ok()) { if (!s.ok()) {
enough = false; enough = false;
if (s.IsPathNotFound()) { if (s.IsPathNotFound()) {
@ -6299,7 +6305,8 @@ Status ReactiveVersionSet::ApplyOneVersionEditToBuilder(
cfd->internal_stats(), db_options_->max_file_opening_threads, cfd->internal_stats(), db_options_->max_file_opening_threads,
false /* prefetch_index_and_filter_in_cache */, false /* prefetch_index_and_filter_in_cache */,
false /* is_initial_load */, false /* is_initial_load */,
cfd->GetLatestMutableCFOptions()->prefix_extractor.get()); cfd->GetLatestMutableCFOptions()->prefix_extractor.get(),
MaxFileSizeForL0MetaPin(*cfd->GetLatestMutableCFOptions()));
TEST_SYNC_POINT_CALLBACK( TEST_SYNC_POINT_CALLBACK(
"ReactiveVersionSet::ApplyOneVersionEditToBuilder:" "ReactiveVersionSet::ApplyOneVersionEditToBuilder:"
"AfterLoadTableHandlers", "AfterLoadTableHandlers",

2
db/version_set.h
Unescape View File

@ -803,6 +803,8 @@ class Version {
int refs_; // Number of live refs to this version int refs_; // Number of live refs to this version
const FileOptions file_options_; const FileOptions file_options_;
const MutableCFOptions mutable_cf_options_; const MutableCFOptions mutable_cf_options_;
// Cached value to avoid recomputing it on every read.
const size_t max_file_size_for_l0_meta_pin_;
// A version number that uniquely represents this version. This is // A version number that uniquely represents this version. This is
// used for debugging and logging purposes only. // used for debugging and logging purposes only.

11
options/cf_options.cc
Unescape View File

@ -720,6 +720,17 @@ uint64_t MaxFileSizeForLevel(const MutableCFOptions& cf_options,
} }
} }
size_t MaxFileSizeForL0MetaPin(const MutableCFOptions& cf_options) {
// We do not want to pin meta-blocks that almost certainly came from intra-L0
// or a former larger `write_buffer_size` value to avoid surprising users with
// pinned memory usage. We use a factor of 1.5 to account for overhead
// introduced during flush in most cases.
if (port::kMaxSizet / 3 < cf_options.write_buffer_size / 2) {
return port::kMaxSizet;
}
return cf_options.write_buffer_size / 2 * 3;
}
void MutableCFOptions::RefreshDerivedOptions(int num_levels, void MutableCFOptions::RefreshDerivedOptions(int num_levels,
CompactionStyle compaction_style) { CompactionStyle compaction_style) {
max_file_size.resize(num_levels); max_file_size.resize(num_levels);

5
options/cf_options.h
Unescape View File

@ -268,4 +268,9 @@ uint64_t MultiplyCheckOverflow(uint64_t op1, double op2);
uint64_t MaxFileSizeForLevel(const MutableCFOptions& cf_options, uint64_t MaxFileSizeForLevel(const MutableCFOptions& cf_options,
int level, CompactionStyle compaction_style, int base_level = 1, int level, CompactionStyle compaction_style, int base_level = 1,
bool level_compaction_dynamic_level_bytes = false); bool level_compaction_dynamic_level_bytes = false);
// Get the max size of an L0 file for which we will pin its meta-blocks when
// `pin_l0_filter_and_index_blocks_in_cache` is set.
size_t MaxFileSizeForL0MetaPin(const MutableCFOptions& cf_options);
} // namespace ROCKSDB_NAMESPACE } // namespace ROCKSDB_NAMESPACE

3
table/block_based/block_based_table_factory.cc
Unescape View File

@ -420,7 +420,8 @@ Status BlockBasedTableFactory::NewTableReader(
table_reader_options.level, table_reader_options.immortal, table_reader_options.level, table_reader_options.immortal,
table_reader_options.largest_seqno, table_reader_options.largest_seqno,
table_reader_options.force_direct_prefetch, &tail_prefetch_stats_, table_reader_options.force_direct_prefetch, &tail_prefetch_stats_,
table_reader_options.block_cache_tracer); table_reader_options.block_cache_tracer,
table_reader_options.max_file_size_for_l0_meta_pin);
} }
TableBuilder* BlockBasedTableFactory::NewTableBuilder( TableBuilder* BlockBasedTableFactory::NewTableBuilder(

12
table/block_based/block_based_table_reader.cc
Unescape View File

@ -610,7 +610,8 @@ Status BlockBasedTable::Open(
const int level, const bool immortal_table, const int level, const bool immortal_table,
const SequenceNumber largest_seqno, const bool force_direct_prefetch, const SequenceNumber largest_seqno, const bool force_direct_prefetch,
TailPrefetchStats* tail_prefetch_stats, TailPrefetchStats* tail_prefetch_stats,
BlockCacheTracer* const block_cache_tracer) { BlockCacheTracer* const block_cache_tracer,
size_t max_file_size_for_l0_meta_pin) {
table_reader->reset(); table_reader->reset();
Status s; Status s;
@ -706,7 +707,8 @@ Status BlockBasedTable::Open(
} }
s = new_table->PrefetchIndexAndFilterBlocks( s = new_table->PrefetchIndexAndFilterBlocks(
prefetch_buffer.get(), metaindex_iter.get(), new_table.get(), prefetch_buffer.get(), metaindex_iter.get(), new_table.get(),
prefetch_all, table_options, level, &lookup_context); prefetch_all, table_options, level, file_size,
max_file_size_for_l0_meta_pin, &lookup_context);
if (s.ok()) { if (s.ok()) {
// Update tail prefetch stats // Update tail prefetch stats
@ -943,6 +945,7 @@ Status BlockBasedTable::PrefetchIndexAndFilterBlocks(
FilePrefetchBuffer* prefetch_buffer, InternalIterator* meta_iter, FilePrefetchBuffer* prefetch_buffer, InternalIterator* meta_iter,
BlockBasedTable* new_table, bool prefetch_all, BlockBasedTable* new_table, bool prefetch_all,
const BlockBasedTableOptions& table_options, const int level, const BlockBasedTableOptions& table_options, const int level,
size_t file_size, size_t max_file_size_for_l0_meta_pin,
BlockCacheLookupContext* lookup_context) { BlockCacheLookupContext* lookup_context) {
Status s; Status s;
@ -987,9 +990,10 @@ Status BlockBasedTable::PrefetchIndexAndFilterBlocks(
const bool use_cache = table_options.cache_index_and_filter_blocks; const bool use_cache = table_options.cache_index_and_filter_blocks;
// pin both index and filters, down to all partitions // pin both index and filters, down to all partitions.
const bool pin_all = const bool pin_all =
rep_->table_options.pin_l0_filter_and_index_blocks_in_cache && level == 0; rep_->table_options.pin_l0_filter_and_index_blocks_in_cache &&
level == 0 && file_size <= max_file_size_for_l0_meta_pin;
// prefetch the first level of index // prefetch the first level of index
const bool prefetch_index = const bool prefetch_index =

4
table/block_based/block_based_table_reader.h
Unescape View File

@ -101,7 +101,8 @@ class BlockBasedTable : public TableReader {
const SequenceNumber largest_seqno = 0, const SequenceNumber largest_seqno = 0,
bool force_direct_prefetch = false, bool force_direct_prefetch = false,
TailPrefetchStats* tail_prefetch_stats = nullptr, TailPrefetchStats* tail_prefetch_stats = nullptr,
BlockCacheTracer* const block_cache_tracer = nullptr); BlockCacheTracer* const block_cache_tracer = nullptr,
size_t max_file_size_for_l0_meta_pin = 0);
bool PrefixMayMatch(const Slice& internal_key, bool PrefixMayMatch(const Slice& internal_key,
const ReadOptions& read_options, const ReadOptions& read_options,
@ -421,6 +422,7 @@ class BlockBasedTable : public TableReader {
FilePrefetchBuffer* prefetch_buffer, InternalIterator* meta_iter, FilePrefetchBuffer* prefetch_buffer, InternalIterator* meta_iter,
BlockBasedTable* new_table, bool prefetch_all, BlockBasedTable* new_table, bool prefetch_all,
const BlockBasedTableOptions& table_options, const int level, const BlockBasedTableOptions& table_options, const int level,
size_t file_size, size_t max_file_size_for_l0_meta_pin,
BlockCacheLookupContext* lookup_context); BlockCacheLookupContext* lookup_context);
static BlockType GetBlockTypeForMetaBlockByName(const Slice& meta_block_name); static BlockType GetBlockTypeForMetaBlockByName(const Slice& meta_block_name);

15
table/table_builder.h
Unescape View File

@ -34,11 +34,13 @@ struct TableReaderOptions {
const InternalKeyComparator& _internal_comparator, const InternalKeyComparator& _internal_comparator,
bool _skip_filters = false, bool _immortal = false, bool _skip_filters = false, bool _immortal = false,
bool _force_direct_prefetch = false, int _level = -1, bool _force_direct_prefetch = false, int _level = -1,
BlockCacheTracer* const _block_cache_tracer = nullptr) BlockCacheTracer* const _block_cache_tracer = nullptr,
size_t _max_file_size_for_l0_meta_pin = 0)
: TableReaderOptions(_ioptions, _prefix_extractor, _env_options, : TableReaderOptions(_ioptions, _prefix_extractor, _env_options,
_internal_comparator, _skip_filters, _immortal, _internal_comparator, _skip_filters, _immortal,
_force_direct_prefetch, _level, _force_direct_prefetch, _level,
0 /* _largest_seqno */, _block_cache_tracer) {} 0 /* _largest_seqno */, _block_cache_tracer,
_max_file_size_for_l0_meta_pin) {}
// @param skip_filters Disables loading/accessing the filter block // @param skip_filters Disables loading/accessing the filter block
TableReaderOptions(const ImmutableCFOptions& _ioptions, TableReaderOptions(const ImmutableCFOptions& _ioptions,
@ -48,7 +50,8 @@ struct TableReaderOptions {
bool _skip_filters, bool _immortal, bool _skip_filters, bool _immortal,
bool _force_direct_prefetch, int _level, bool _force_direct_prefetch, int _level,
SequenceNumber _largest_seqno, SequenceNumber _largest_seqno,
BlockCacheTracer* const _block_cache_tracer) BlockCacheTracer* const _block_cache_tracer,
size_t _max_file_size_for_l0_meta_pin)
: ioptions(_ioptions), : ioptions(_ioptions),
prefix_extractor(_prefix_extractor), prefix_extractor(_prefix_extractor),
env_options(_env_options), env_options(_env_options),
@ -58,7 +61,8 @@ struct TableReaderOptions {
force_direct_prefetch(_force_direct_prefetch), force_direct_prefetch(_force_direct_prefetch),
level(_level), level(_level),
largest_seqno(_largest_seqno), largest_seqno(_largest_seqno),
block_cache_tracer(_block_cache_tracer) {} block_cache_tracer(_block_cache_tracer),
max_file_size_for_l0_meta_pin(_max_file_size_for_l0_meta_pin) {}
const ImmutableCFOptions& ioptions; const ImmutableCFOptions& ioptions;
const SliceTransform* prefix_extractor; const SliceTransform* prefix_extractor;
@ -77,6 +81,9 @@ struct TableReaderOptions {
// largest seqno in the table // largest seqno in the table
SequenceNumber largest_seqno; SequenceNumber largest_seqno;
BlockCacheTracer* const block_cache_tracer; BlockCacheTracer* const block_cache_tracer;
// Largest L0 file size whose meta-blocks may be pinned (can be zero when
// unknown).
const size_t max_file_size_for_l0_meta_pin;
}; };
struct TableBuilderOptions { struct TableBuilderOptions {

3
table/table_test.cc
Unescape View File

@ -378,7 +378,8 @@ class TableConstructor: public Constructor {
return ioptions.table_factory->NewTableReader( return ioptions.table_factory->NewTableReader(
TableReaderOptions(ioptions, moptions.prefix_extractor.get(), soptions, TableReaderOptions(ioptions, moptions.prefix_extractor.get(), soptions,
internal_comparator, !kSkipFilters, !kImmortal, internal_comparator, !kSkipFilters, !kImmortal,
false, level_, largest_seqno_, &block_cache_tracer_), false, level_, largest_seqno_, &block_cache_tracer_,
moptions.write_buffer_size),
std::move(file_reader_), TEST_GetSink()->contents().size(), std::move(file_reader_), TEST_GetSink()->contents().size(),
&table_reader_); &table_reader_);
} }

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