// 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). // // Copyright (c) 2011 The LevelDB Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. See the AUTHORS file for names of contributors. #include "db/internal_stats.h" #ifndef __STDC_FORMAT_MACROS #define __STDC_FORMAT_MACROS #endif #include #include #include #include #include #include "db/column_family.h" #include "db/db_impl.h" #include "util/string_util.h" namespace rocksdb { #ifndef ROCKSDB_LITE const std::map InternalStats::compaction_level_stats = { {LevelStatType::NUM_FILES, LevelStat{"NumFiles", "Files"}}, {LevelStatType::COMPACTED_FILES, LevelStat{"CompactedFiles", "CompactedFiles"}}, {LevelStatType::SIZE_BYTES, LevelStat{"SizeBytes", "Size"}}, {LevelStatType::SCORE, LevelStat{"Score", "Score"}}, {LevelStatType::READ_GB, LevelStat{"ReadGB", "Read(GB)"}}, {LevelStatType::RN_GB, LevelStat{"RnGB", "Rn(GB)"}}, {LevelStatType::RNP1_GB, LevelStat{"Rnp1GB", "Rnp1(GB)"}}, {LevelStatType::WRITE_GB, LevelStat{"WriteGB", "Write(GB)"}}, {LevelStatType::W_NEW_GB, LevelStat{"WnewGB", "Wnew(GB)"}}, {LevelStatType::MOVED_GB, LevelStat{"MovedGB", "Moved(GB)"}}, {LevelStatType::WRITE_AMP, LevelStat{"WriteAmp", "W-Amp"}}, {LevelStatType::READ_MBPS, LevelStat{"ReadMBps", "Rd(MB/s)"}}, {LevelStatType::WRITE_MBPS, LevelStat{"WriteMBps", "Wr(MB/s)"}}, {LevelStatType::COMP_SEC, LevelStat{"CompSec", "Comp(sec)"}}, {LevelStatType::COMP_COUNT, LevelStat{"CompCount", "Comp(cnt)"}}, {LevelStatType::AVG_SEC, LevelStat{"AvgSec", "Avg(sec)"}}, {LevelStatType::KEY_IN, LevelStat{"KeyIn", "KeyIn"}}, {LevelStatType::KEY_DROP, LevelStat{"KeyDrop", "KeyDrop"}}, }; namespace { const double kMB = 1048576.0; const double kGB = kMB * 1024; const double kMicrosInSec = 1000000.0; void PrintLevelStatsHeader(char* buf, size_t len, const std::string& cf_name) { int written_size = snprintf(buf, len, "\n** Compaction Stats [%s] **\n", cf_name.c_str()); auto hdr = [](LevelStatType t) { return InternalStats::compaction_level_stats.at(t).header_name.c_str(); }; int line_size = snprintf( buf + written_size, len - written_size, "Level %s %s %s %s %s %s %s %s %s %s %s %s %s %s %s %s %s\n", // Note that we skip COMPACTED_FILES and merge it with Files column hdr(LevelStatType::NUM_FILES), hdr(LevelStatType::SIZE_BYTES), hdr(LevelStatType::SCORE), hdr(LevelStatType::READ_GB), hdr(LevelStatType::RN_GB), hdr(LevelStatType::RNP1_GB), hdr(LevelStatType::WRITE_GB), hdr(LevelStatType::W_NEW_GB), hdr(LevelStatType::MOVED_GB), hdr(LevelStatType::WRITE_AMP), hdr(LevelStatType::READ_MBPS), hdr(LevelStatType::WRITE_MBPS), hdr(LevelStatType::COMP_SEC), hdr(LevelStatType::COMP_COUNT), hdr(LevelStatType::AVG_SEC), hdr(LevelStatType::KEY_IN), hdr(LevelStatType::KEY_DROP)); written_size += line_size; snprintf(buf + written_size, len - written_size, "%s\n", std::string(line_size, '-').c_str()); } void PrepareLevelStats(std::map* level_stats, int num_files, int being_compacted, double total_file_size, double score, double w_amp, const InternalStats::CompactionStats& stats) { uint64_t bytes_read = stats.bytes_read_non_output_levels + stats.bytes_read_output_level; int64_t bytes_new = stats.bytes_written - stats.bytes_read_output_level; double elapsed = (stats.micros + 1) / kMicrosInSec; (*level_stats)[LevelStatType::NUM_FILES] = num_files; (*level_stats)[LevelStatType::COMPACTED_FILES] = being_compacted; (*level_stats)[LevelStatType::SIZE_BYTES] = total_file_size; (*level_stats)[LevelStatType::SCORE] = score; (*level_stats)[LevelStatType::READ_GB] = bytes_read / kGB; (*level_stats)[LevelStatType::RN_GB] = stats.bytes_read_non_output_levels / kGB; (*level_stats)[LevelStatType::RNP1_GB] = stats.bytes_read_output_level / kGB; (*level_stats)[LevelStatType::WRITE_GB] = stats.bytes_written / kGB; (*level_stats)[LevelStatType::W_NEW_GB] = bytes_new / kGB; (*level_stats)[LevelStatType::MOVED_GB] = stats.bytes_moved / kGB; (*level_stats)[LevelStatType::WRITE_AMP] = w_amp; (*level_stats)[LevelStatType::READ_MBPS] = bytes_read / kMB / elapsed; (*level_stats)[LevelStatType::WRITE_MBPS] = stats.bytes_written / kMB / elapsed; (*level_stats)[LevelStatType::COMP_SEC] = stats.micros / kMicrosInSec; (*level_stats)[LevelStatType::COMP_COUNT] = stats.count; (*level_stats)[LevelStatType::AVG_SEC] = stats.count == 0 ? 0 : stats.micros / kMicrosInSec / stats.count; (*level_stats)[LevelStatType::KEY_IN] = static_cast(stats.num_input_records); (*level_stats)[LevelStatType::KEY_DROP] = static_cast(stats.num_dropped_records); } void PrintLevelStats(char* buf, size_t len, const std::string& name, const std::map& stat_value) { snprintf(buf, len, "%4s " /* Level */ "%6d/%-3d " /* Files */ "%8s " /* Size */ "%5.1f " /* Score */ "%8.1f " /* Read(GB) */ "%7.1f " /* Rn(GB) */ "%8.1f " /* Rnp1(GB) */ "%9.1f " /* Write(GB) */ "%8.1f " /* Wnew(GB) */ "%9.1f " /* Moved(GB) */ "%5.1f " /* W-Amp */ "%8.1f " /* Rd(MB/s) */ "%8.1f " /* Wr(MB/s) */ "%9.0f " /* Comp(sec) */ "%9d " /* Comp(cnt) */ "%8.3f " /* Avg(sec) */ "%7s " /* KeyIn */ "%6s\n", /* KeyDrop */ name.c_str(), static_cast(stat_value.at(LevelStatType::NUM_FILES)), static_cast(stat_value.at(LevelStatType::COMPACTED_FILES)), BytesToHumanString( static_cast(stat_value.at(LevelStatType::SIZE_BYTES))) .c_str(), stat_value.at(LevelStatType::SCORE), stat_value.at(LevelStatType::READ_GB), stat_value.at(LevelStatType::RN_GB), stat_value.at(LevelStatType::RNP1_GB), stat_value.at(LevelStatType::WRITE_GB), stat_value.at(LevelStatType::W_NEW_GB), stat_value.at(LevelStatType::MOVED_GB), stat_value.at(LevelStatType::WRITE_AMP), stat_value.at(LevelStatType::READ_MBPS), stat_value.at(LevelStatType::WRITE_MBPS), stat_value.at(LevelStatType::COMP_SEC), static_cast(stat_value.at(LevelStatType::COMP_COUNT)), stat_value.at(LevelStatType::AVG_SEC), NumberToHumanString( static_cast(stat_value.at(LevelStatType::KEY_IN))) .c_str(), NumberToHumanString(static_cast( stat_value.at(LevelStatType::KEY_DROP))) .c_str()); } void PrintLevelStats(char* buf, size_t len, const std::string& name, int num_files, int being_compacted, double total_file_size, double score, double w_amp, const InternalStats::CompactionStats& stats) { std::map level_stats; PrepareLevelStats(&level_stats, num_files, being_compacted, total_file_size, score, w_amp, stats); PrintLevelStats(buf, len, name, level_stats); } // Assumes that trailing numbers represent an optional argument. This requires // property names to not end with numbers. std::pair GetPropertyNameAndArg(const Slice& property) { Slice name = property, arg = property; size_t sfx_len = 0; while (sfx_len < property.size() && isdigit(property[property.size() - sfx_len - 1])) { ++sfx_len; } name.remove_suffix(sfx_len); arg.remove_prefix(property.size() - sfx_len); return {name, arg}; } } // anonymous namespace static const std::string rocksdb_prefix = "rocksdb."; static const std::string num_files_at_level_prefix = "num-files-at-level"; static const std::string compression_ratio_at_level_prefix = "compression-ratio-at-level"; static const std::string allstats = "stats"; static const std::string sstables = "sstables"; static const std::string cfstats = "cfstats"; static const std::string cfstats_no_file_histogram = "cfstats-no-file-histogram"; static const std::string cf_file_histogram = "cf-file-histogram"; static const std::string dbstats = "dbstats"; static const std::string levelstats = "levelstats"; static const std::string num_immutable_mem_table = "num-immutable-mem-table"; static const std::string num_immutable_mem_table_flushed = "num-immutable-mem-table-flushed"; static const std::string mem_table_flush_pending = "mem-table-flush-pending"; static const std::string compaction_pending = "compaction-pending"; static const std::string background_errors = "background-errors"; static const std::string cur_size_active_mem_table = "cur-size-active-mem-table"; static const std::string cur_size_all_mem_tables = "cur-size-all-mem-tables"; static const std::string size_all_mem_tables = "size-all-mem-tables"; static const std::string num_entries_active_mem_table = "num-entries-active-mem-table"; static const std::string num_entries_imm_mem_tables = "num-entries-imm-mem-tables"; static const std::string num_deletes_active_mem_table = "num-deletes-active-mem-table"; static const std::string num_deletes_imm_mem_tables = "num-deletes-imm-mem-tables"; static const std::string estimate_num_keys = "estimate-num-keys"; static const std::string estimate_table_readers_mem = "estimate-table-readers-mem"; static const std::string is_file_deletions_enabled = "is-file-deletions-enabled"; static const std::string num_snapshots = "num-snapshots"; static const std::string oldest_snapshot_time = "oldest-snapshot-time"; static const std::string num_live_versions = "num-live-versions"; static const std::string current_version_number = "current-super-version-number"; static const std::string estimate_live_data_size = "estimate-live-data-size"; static const std::string min_log_number_to_keep = "min-log-number-to-keep"; static const std::string base_level = "base-level"; static const std::string total_sst_files_size = "total-sst-files-size"; static const std::string estimate_pending_comp_bytes = "estimate-pending-compaction-bytes"; static const std::string aggregated_table_properties = "aggregated-table-properties"; static const std::string aggregated_table_properties_at_level = aggregated_table_properties + "-at-level"; static const std::string num_running_compactions = "num-running-compactions"; static const std::string num_running_flushes = "num-running-flushes"; static const std::string actual_delayed_write_rate = "actual-delayed-write-rate"; static const std::string is_write_stopped = "is-write-stopped"; const std::string DB::Properties::kNumFilesAtLevelPrefix = rocksdb_prefix + num_files_at_level_prefix; const std::string DB::Properties::kCompressionRatioAtLevelPrefix = rocksdb_prefix + compression_ratio_at_level_prefix; const std::string DB::Properties::kStats = rocksdb_prefix + allstats; const std::string DB::Properties::kSSTables = rocksdb_prefix + sstables; const std::string DB::Properties::kCFStats = rocksdb_prefix + cfstats; const std::string DB::Properties::kCFStatsNoFileHistogram = rocksdb_prefix + cfstats_no_file_histogram; const std::string DB::Properties::kCFFileHistogram = rocksdb_prefix + cf_file_histogram; const std::string DB::Properties::kDBStats = rocksdb_prefix + dbstats; const std::string DB::Properties::kLevelStats = rocksdb_prefix + levelstats; const std::string DB::Properties::kNumImmutableMemTable = rocksdb_prefix + num_immutable_mem_table; const std::string DB::Properties::kNumImmutableMemTableFlushed = rocksdb_prefix + num_immutable_mem_table_flushed; const std::string DB::Properties::kMemTableFlushPending = rocksdb_prefix + mem_table_flush_pending; const std::string DB::Properties::kCompactionPending = rocksdb_prefix + compaction_pending; const std::string DB::Properties::kNumRunningCompactions = rocksdb_prefix + num_running_compactions; const std::string DB::Properties::kNumRunningFlushes = rocksdb_prefix + num_running_flushes; const std::string DB::Properties::kBackgroundErrors = rocksdb_prefix + background_errors; const std::string DB::Properties::kCurSizeActiveMemTable = rocksdb_prefix + cur_size_active_mem_table; const std::string DB::Properties::kCurSizeAllMemTables = rocksdb_prefix + cur_size_all_mem_tables; const std::string DB::Properties::kSizeAllMemTables = rocksdb_prefix + size_all_mem_tables; const std::string DB::Properties::kNumEntriesActiveMemTable = rocksdb_prefix + num_entries_active_mem_table; const std::string DB::Properties::kNumEntriesImmMemTables = rocksdb_prefix + num_entries_imm_mem_tables; const std::string DB::Properties::kNumDeletesActiveMemTable = rocksdb_prefix + num_deletes_active_mem_table; const std::string DB::Properties::kNumDeletesImmMemTables = rocksdb_prefix + num_deletes_imm_mem_tables; const std::string DB::Properties::kEstimateNumKeys = rocksdb_prefix + estimate_num_keys; const std::string DB::Properties::kEstimateTableReadersMem = rocksdb_prefix + estimate_table_readers_mem; const std::string DB::Properties::kIsFileDeletionsEnabled = rocksdb_prefix + is_file_deletions_enabled; const std::string DB::Properties::kNumSnapshots = rocksdb_prefix + num_snapshots; const std::string DB::Properties::kOldestSnapshotTime = rocksdb_prefix + oldest_snapshot_time; const std::string DB::Properties::kNumLiveVersions = rocksdb_prefix + num_live_versions; const std::string DB::Properties::kCurrentSuperVersionNumber = rocksdb_prefix + current_version_number; const std::string DB::Properties::kEstimateLiveDataSize = rocksdb_prefix + estimate_live_data_size; const std::string DB::Properties::kMinLogNumberToKeep = rocksdb_prefix + min_log_number_to_keep; const std::string DB::Properties::kTotalSstFilesSize = rocksdb_prefix + total_sst_files_size; const std::string DB::Properties::kBaseLevel = rocksdb_prefix + base_level; const std::string DB::Properties::kEstimatePendingCompactionBytes = rocksdb_prefix + estimate_pending_comp_bytes; const std::string DB::Properties::kAggregatedTableProperties = rocksdb_prefix + aggregated_table_properties; const std::string DB::Properties::kAggregatedTablePropertiesAtLevel = rocksdb_prefix + aggregated_table_properties_at_level; const std::string DB::Properties::kActualDelayedWriteRate = rocksdb_prefix + actual_delayed_write_rate; const std::string DB::Properties::kIsWriteStopped = rocksdb_prefix + is_write_stopped; const std::unordered_map InternalStats::ppt_name_to_info = { {DB::Properties::kNumFilesAtLevelPrefix, {false, &InternalStats::HandleNumFilesAtLevel, nullptr, nullptr}}, {DB::Properties::kCompressionRatioAtLevelPrefix, {false, &InternalStats::HandleCompressionRatioAtLevelPrefix, nullptr, nullptr}}, {DB::Properties::kLevelStats, {false, &InternalStats::HandleLevelStats, nullptr, nullptr}}, {DB::Properties::kStats, {false, &InternalStats::HandleStats, nullptr, nullptr}}, {DB::Properties::kCFStats, {false, &InternalStats::HandleCFStats, nullptr, &InternalStats::HandleCFMapStats}}, {DB::Properties::kCFStatsNoFileHistogram, {false, &InternalStats::HandleCFStatsNoFileHistogram, nullptr, nullptr}}, {DB::Properties::kCFFileHistogram, {false, &InternalStats::HandleCFFileHistogram, nullptr, nullptr}}, {DB::Properties::kDBStats, {false, &InternalStats::HandleDBStats, nullptr, nullptr}}, {DB::Properties::kSSTables, {false, &InternalStats::HandleSsTables, nullptr, nullptr}}, {DB::Properties::kAggregatedTableProperties, {false, &InternalStats::HandleAggregatedTableProperties, nullptr, nullptr}}, {DB::Properties::kAggregatedTablePropertiesAtLevel, {false, &InternalStats::HandleAggregatedTablePropertiesAtLevel, nullptr, nullptr}}, {DB::Properties::kNumImmutableMemTable, {false, nullptr, &InternalStats::HandleNumImmutableMemTable, nullptr}}, {DB::Properties::kNumImmutableMemTableFlushed, {false, nullptr, &InternalStats::HandleNumImmutableMemTableFlushed, nullptr}}, {DB::Properties::kMemTableFlushPending, {false, nullptr, &InternalStats::HandleMemTableFlushPending, nullptr}}, {DB::Properties::kCompactionPending, {false, nullptr, &InternalStats::HandleCompactionPending, nullptr}}, {DB::Properties::kBackgroundErrors, {false, nullptr, &InternalStats::HandleBackgroundErrors, nullptr}}, {DB::Properties::kCurSizeActiveMemTable, {false, nullptr, &InternalStats::HandleCurSizeActiveMemTable, nullptr}}, {DB::Properties::kCurSizeAllMemTables, {false, nullptr, &InternalStats::HandleCurSizeAllMemTables, nullptr}}, {DB::Properties::kSizeAllMemTables, {false, nullptr, &InternalStats::HandleSizeAllMemTables, nullptr}}, {DB::Properties::kNumEntriesActiveMemTable, {false, nullptr, &InternalStats::HandleNumEntriesActiveMemTable, nullptr}}, {DB::Properties::kNumEntriesImmMemTables, {false, nullptr, &InternalStats::HandleNumEntriesImmMemTables, nullptr}}, {DB::Properties::kNumDeletesActiveMemTable, {false, nullptr, &InternalStats::HandleNumDeletesActiveMemTable, nullptr}}, {DB::Properties::kNumDeletesImmMemTables, {false, nullptr, &InternalStats::HandleNumDeletesImmMemTables, nullptr}}, {DB::Properties::kEstimateNumKeys, {false, nullptr, &InternalStats::HandleEstimateNumKeys, nullptr}}, {DB::Properties::kEstimateTableReadersMem, {true, nullptr, &InternalStats::HandleEstimateTableReadersMem, nullptr}}, {DB::Properties::kIsFileDeletionsEnabled, {false, nullptr, &InternalStats::HandleIsFileDeletionsEnabled, nullptr}}, {DB::Properties::kNumSnapshots, {false, nullptr, &InternalStats::HandleNumSnapshots, nullptr}}, {DB::Properties::kOldestSnapshotTime, {false, nullptr, &InternalStats::HandleOldestSnapshotTime, nullptr}}, {DB::Properties::kNumLiveVersions, {false, nullptr, &InternalStats::HandleNumLiveVersions, nullptr}}, {DB::Properties::kCurrentSuperVersionNumber, {false, nullptr, &InternalStats::HandleCurrentSuperVersionNumber, nullptr}}, {DB::Properties::kEstimateLiveDataSize, {true, nullptr, &InternalStats::HandleEstimateLiveDataSize, nullptr}}, {DB::Properties::kMinLogNumberToKeep, {false, nullptr, &InternalStats::HandleMinLogNumberToKeep, nullptr}}, {DB::Properties::kBaseLevel, {false, nullptr, &InternalStats::HandleBaseLevel, nullptr}}, {DB::Properties::kTotalSstFilesSize, {false, nullptr, &InternalStats::HandleTotalSstFilesSize, nullptr}}, {DB::Properties::kEstimatePendingCompactionBytes, {false, nullptr, &InternalStats::HandleEstimatePendingCompactionBytes, nullptr}}, {DB::Properties::kNumRunningFlushes, {false, nullptr, &InternalStats::HandleNumRunningFlushes, nullptr}}, {DB::Properties::kNumRunningCompactions, {false, nullptr, &InternalStats::HandleNumRunningCompactions, nullptr}}, {DB::Properties::kActualDelayedWriteRate, {false, nullptr, &InternalStats::HandleActualDelayedWriteRate, nullptr}}, {DB::Properties::kIsWriteStopped, {false, nullptr, &InternalStats::HandleIsWriteStopped, nullptr}}, }; const DBPropertyInfo* GetPropertyInfo(const Slice& property) { std::string ppt_name = GetPropertyNameAndArg(property).first.ToString(); auto ppt_info_iter = InternalStats::ppt_name_to_info.find(ppt_name); if (ppt_info_iter == InternalStats::ppt_name_to_info.end()) { return nullptr; } return &ppt_info_iter->second; } bool InternalStats::GetStringProperty(const DBPropertyInfo& property_info, const Slice& property, std::string* value) { assert(value != nullptr); assert(property_info.handle_string != nullptr); Slice arg = GetPropertyNameAndArg(property).second; return (this->*(property_info.handle_string))(value, arg); } bool InternalStats::GetMapProperty(const DBPropertyInfo& property_info, const Slice& property, std::map* value) { assert(value != nullptr); assert(property_info.handle_map != nullptr); return (this->*(property_info.handle_map))(value); } bool InternalStats::GetIntProperty(const DBPropertyInfo& property_info, uint64_t* value, DBImpl* db) { assert(value != nullptr); assert(property_info.handle_int != nullptr && !property_info.need_out_of_mutex); db->mutex_.AssertHeld(); return (this->*(property_info.handle_int))(value, db, nullptr /* version */); } bool InternalStats::GetIntPropertyOutOfMutex( const DBPropertyInfo& property_info, Version* version, uint64_t* value) { assert(value != nullptr); assert(property_info.handle_int != nullptr && property_info.need_out_of_mutex); return (this->*(property_info.handle_int))(value, nullptr /* db */, version); } bool InternalStats::HandleNumFilesAtLevel(std::string* value, Slice suffix) { uint64_t level; const auto* vstorage = cfd_->current()->storage_info(); bool ok = ConsumeDecimalNumber(&suffix, &level) && suffix.empty(); if (!ok || static_cast(level) >= number_levels_) { return false; } else { char buf[100]; snprintf(buf, sizeof(buf), "%d", vstorage->NumLevelFiles(static_cast(level))); *value = buf; return true; } } bool InternalStats::HandleCompressionRatioAtLevelPrefix(std::string* value, Slice suffix) { uint64_t level; const auto* vstorage = cfd_->current()->storage_info(); bool ok = ConsumeDecimalNumber(&suffix, &level) && suffix.empty(); if (!ok || level >= static_cast(number_levels_)) { return false; } *value = ToString( vstorage->GetEstimatedCompressionRatioAtLevel(static_cast(level))); return true; } bool InternalStats::HandleLevelStats(std::string* value, Slice suffix) { char buf[1000]; const auto* vstorage = cfd_->current()->storage_info(); snprintf(buf, sizeof(buf), "Level Files Size(MB)\n" "--------------------\n"); value->append(buf); for (int level = 0; level < number_levels_; level++) { snprintf(buf, sizeof(buf), "%3d %8d %8.0f\n", level, vstorage->NumLevelFiles(level), vstorage->NumLevelBytes(level) / kMB); value->append(buf); } return true; } bool InternalStats::HandleStats(std::string* value, Slice suffix) { if (!HandleCFStats(value, suffix)) { return false; } if (!HandleDBStats(value, suffix)) { return false; } return true; } bool InternalStats::HandleCFMapStats( std::map* cf_stats) { DumpCFMapStats(cf_stats); return true; } bool InternalStats::HandleCFStats(std::string* value, Slice suffix) { DumpCFStats(value); return true; } bool InternalStats::HandleCFStatsNoFileHistogram(std::string* value, Slice suffix) { DumpCFStatsNoFileHistogram(value); return true; } bool InternalStats::HandleCFFileHistogram(std::string* value, Slice suffix) { DumpCFFileHistogram(value); return true; } bool InternalStats::HandleDBStats(std::string* value, Slice suffix) { DumpDBStats(value); return true; } bool InternalStats::HandleSsTables(std::string* value, Slice suffix) { auto* current = cfd_->current(); *value = current->DebugString(true, true); return true; } bool InternalStats::HandleAggregatedTableProperties(std::string* value, Slice suffix) { std::shared_ptr tp; auto s = cfd_->current()->GetAggregatedTableProperties(&tp); if (!s.ok()) { return false; } *value = tp->ToString(); return true; } bool InternalStats::HandleAggregatedTablePropertiesAtLevel(std::string* value, Slice suffix) { uint64_t level; bool ok = ConsumeDecimalNumber(&suffix, &level) && suffix.empty(); if (!ok || static_cast(level) >= number_levels_) { return false; } std::shared_ptr tp; auto s = cfd_->current()->GetAggregatedTableProperties( &tp, static_cast(level)); if (!s.ok()) { return false; } *value = tp->ToString(); return true; } bool InternalStats::HandleNumImmutableMemTable(uint64_t* value, DBImpl* db, Version* version) { *value = cfd_->imm()->NumNotFlushed(); return true; } bool InternalStats::HandleNumImmutableMemTableFlushed(uint64_t* value, DBImpl* db, Version* version) { *value = cfd_->imm()->NumFlushed(); return true; } bool InternalStats::HandleMemTableFlushPending(uint64_t* value, DBImpl* db, Version* version) { // Return number of mem tables that are ready to flush (made immutable) *value = (cfd_->imm()->IsFlushPending() ? 1 : 0); return true; } bool InternalStats::HandleNumRunningFlushes(uint64_t* value, DBImpl* db, Version* version) { *value = db->num_running_flushes(); return true; } bool InternalStats::HandleCompactionPending(uint64_t* value, DBImpl* db, Version* version) { // 1 if the system already determines at least one compaction is needed. // 0 otherwise, const auto* vstorage = cfd_->current()->storage_info(); *value = (cfd_->compaction_picker()->NeedsCompaction(vstorage) ? 1 : 0); return true; } bool InternalStats::HandleNumRunningCompactions(uint64_t* value, DBImpl* db, Version* version) { *value = db->num_running_compactions_; return true; } bool InternalStats::HandleBackgroundErrors(uint64_t* value, DBImpl* db, Version* version) { // Accumulated number of errors in background flushes or compactions. *value = GetBackgroundErrorCount(); return true; } bool InternalStats::HandleCurSizeActiveMemTable(uint64_t* value, DBImpl* db, Version* version) { // Current size of the active memtable *value = cfd_->mem()->ApproximateMemoryUsage(); return true; } bool InternalStats::HandleCurSizeAllMemTables(uint64_t* value, DBImpl* db, Version* version) { // Current size of the active memtable + immutable memtables *value = cfd_->mem()->ApproximateMemoryUsage() + cfd_->imm()->ApproximateUnflushedMemTablesMemoryUsage(); return true; } bool InternalStats::HandleSizeAllMemTables(uint64_t* value, DBImpl* db, Version* version) { *value = cfd_->mem()->ApproximateMemoryUsage() + cfd_->imm()->ApproximateMemoryUsage(); return true; } bool InternalStats::HandleNumEntriesActiveMemTable(uint64_t* value, DBImpl* db, Version* version) { // Current number of entires in the active memtable *value = cfd_->mem()->num_entries(); return true; } bool InternalStats::HandleNumEntriesImmMemTables(uint64_t* value, DBImpl* db, Version* version) { // Current number of entries in the immutable memtables *value = cfd_->imm()->current()->GetTotalNumEntries(); return true; } bool InternalStats::HandleNumDeletesActiveMemTable(uint64_t* value, DBImpl* db, Version* version) { // Current number of entires in the active memtable *value = cfd_->mem()->num_deletes(); return true; } bool InternalStats::HandleNumDeletesImmMemTables(uint64_t* value, DBImpl* db, Version* version) { // Current number of entries in the immutable memtables *value = cfd_->imm()->current()->GetTotalNumDeletes(); return true; } bool InternalStats::HandleEstimateNumKeys(uint64_t* value, DBImpl* db, Version* version) { // Estimate number of entries in the column family: // Use estimated entries in tables + total entries in memtables. const auto* vstorage = cfd_->current()->storage_info(); uint64_t estimate_keys = cfd_->mem()->num_entries() + cfd_->imm()->current()->GetTotalNumEntries() + vstorage->GetEstimatedActiveKeys(); uint64_t estimate_deletes = cfd_->mem()->num_deletes() + cfd_->imm()->current()->GetTotalNumDeletes(); *value = estimate_keys > estimate_deletes * 2 ? estimate_keys - (estimate_deletes * 2) : 0; return true; } bool InternalStats::HandleNumSnapshots(uint64_t* value, DBImpl* db, Version* version) { *value = db->snapshots().count(); return true; } bool InternalStats::HandleOldestSnapshotTime(uint64_t* value, DBImpl* db, Version* version) { *value = static_cast(db->snapshots().GetOldestSnapshotTime()); return true; } bool InternalStats::HandleNumLiveVersions(uint64_t* value, DBImpl* db, Version* version) { *value = cfd_->GetNumLiveVersions(); return true; } bool InternalStats::HandleCurrentSuperVersionNumber(uint64_t* value, DBImpl* db, Version* version) { *value = cfd_->GetSuperVersionNumber(); return true; } bool InternalStats::HandleIsFileDeletionsEnabled(uint64_t* value, DBImpl* db, Version* version) { *value = db->IsFileDeletionsEnabled(); return true; } bool InternalStats::HandleBaseLevel(uint64_t* value, DBImpl* db, Version* version) { const auto* vstorage = cfd_->current()->storage_info(); *value = vstorage->base_level(); return true; } bool InternalStats::HandleTotalSstFilesSize(uint64_t* value, DBImpl* db, Version* version) { *value = cfd_->GetTotalSstFilesSize(); return true; } bool InternalStats::HandleEstimatePendingCompactionBytes(uint64_t* value, DBImpl* db, Version* version) { const auto* vstorage = cfd_->current()->storage_info(); *value = vstorage->estimated_compaction_needed_bytes(); return true; } bool InternalStats::HandleEstimateTableReadersMem(uint64_t* value, DBImpl* db, Version* version) { *value = (version == nullptr) ? 0 : version->GetMemoryUsageByTableReaders(); return true; } bool InternalStats::HandleEstimateLiveDataSize(uint64_t* value, DBImpl* db, Version* version) { const auto* vstorage = cfd_->current()->storage_info(); *value = vstorage->EstimateLiveDataSize(); return true; } bool InternalStats::HandleMinLogNumberToKeep(uint64_t* value, DBImpl* db, Version* version) { *value = db->MinLogNumberToKeep(); return true; } bool InternalStats::HandleActualDelayedWriteRate(uint64_t* value, DBImpl* db, Version* version) { const WriteController& wc = db->write_controller(); if (!wc.NeedsDelay()) { *value = 0; } else { *value = wc.delayed_write_rate(); } return true; } bool InternalStats::HandleIsWriteStopped(uint64_t* value, DBImpl* db, Version* version) { *value = db->write_controller().IsStopped() ? 1 : 0; return true; } void InternalStats::DumpDBStats(std::string* value) { char buf[1000]; // DB-level stats, only available from default column family double seconds_up = (env_->NowMicros() - started_at_ + 1) / kMicrosInSec; double interval_seconds_up = seconds_up - db_stats_snapshot_.seconds_up; snprintf(buf, sizeof(buf), "\n** DB Stats **\nUptime(secs): %.1f total, %.1f interval\n", seconds_up, interval_seconds_up); value->append(buf); // Cumulative uint64_t user_bytes_written = GetDBStats(InternalStats::BYTES_WRITTEN); uint64_t num_keys_written = GetDBStats(InternalStats::NUMBER_KEYS_WRITTEN); uint64_t write_other = GetDBStats(InternalStats::WRITE_DONE_BY_OTHER); uint64_t write_self = GetDBStats(InternalStats::WRITE_DONE_BY_SELF); uint64_t wal_bytes = GetDBStats(InternalStats::WAL_FILE_BYTES); uint64_t wal_synced = GetDBStats(InternalStats::WAL_FILE_SYNCED); uint64_t write_with_wal = GetDBStats(InternalStats::WRITE_WITH_WAL); uint64_t write_stall_micros = GetDBStats(InternalStats::WRITE_STALL_MICROS); const int kHumanMicrosLen = 32; char human_micros[kHumanMicrosLen]; // Data // writes: total number of write requests. // keys: total number of key updates issued by all the write requests // commit groups: number of group commits issued to the DB. Each group can // contain one or more writes. // so writes/keys is the average number of put in multi-put or put // writes/groups is the average group commit size. // // The format is the same for interval stats. snprintf(buf, sizeof(buf), "Cumulative writes: %s writes, %s keys, %s commit groups, " "%.1f writes per commit group, ingest: %.2f GB, %.2f MB/s\n", NumberToHumanString(write_other + write_self).c_str(), NumberToHumanString(num_keys_written).c_str(), NumberToHumanString(write_self).c_str(), (write_other + write_self) / static_cast(write_self + 1), user_bytes_written / kGB, user_bytes_written / kMB / seconds_up); value->append(buf); // WAL snprintf(buf, sizeof(buf), "Cumulative WAL: %s writes, %s syncs, " "%.2f writes per sync, written: %.2f GB, %.2f MB/s\n", NumberToHumanString(write_with_wal).c_str(), NumberToHumanString(wal_synced).c_str(), write_with_wal / static_cast(wal_synced + 1), wal_bytes / kGB, wal_bytes / kMB / seconds_up); value->append(buf); // Stall AppendHumanMicros(write_stall_micros, human_micros, kHumanMicrosLen, true); snprintf(buf, sizeof(buf), "Cumulative stall: %s, %.1f percent\n", human_micros, // 10000 = divide by 1M to get secs, then multiply by 100 for pct write_stall_micros / 10000.0 / std::max(seconds_up, 0.001)); value->append(buf); // Interval uint64_t interval_write_other = write_other - db_stats_snapshot_.write_other; uint64_t interval_write_self = write_self - db_stats_snapshot_.write_self; uint64_t interval_num_keys_written = num_keys_written - db_stats_snapshot_.num_keys_written; snprintf(buf, sizeof(buf), "Interval writes: %s writes, %s keys, %s commit groups, " "%.1f writes per commit group, ingest: %.2f MB, %.2f MB/s\n", NumberToHumanString( interval_write_other + interval_write_self).c_str(), NumberToHumanString(interval_num_keys_written).c_str(), NumberToHumanString(interval_write_self).c_str(), static_cast(interval_write_other + interval_write_self) / (interval_write_self + 1), (user_bytes_written - db_stats_snapshot_.ingest_bytes) / kMB, (user_bytes_written - db_stats_snapshot_.ingest_bytes) / kMB / std::max(interval_seconds_up, 0.001)), value->append(buf); uint64_t interval_write_with_wal = write_with_wal - db_stats_snapshot_.write_with_wal; uint64_t interval_wal_synced = wal_synced - db_stats_snapshot_.wal_synced; uint64_t interval_wal_bytes = wal_bytes - db_stats_snapshot_.wal_bytes; snprintf(buf, sizeof(buf), "Interval WAL: %s writes, %s syncs, " "%.2f writes per sync, written: %.2f MB, %.2f MB/s\n", NumberToHumanString(interval_write_with_wal).c_str(), NumberToHumanString(interval_wal_synced).c_str(), interval_write_with_wal / static_cast(interval_wal_synced + 1), interval_wal_bytes / kGB, interval_wal_bytes / kMB / std::max(interval_seconds_up, 0.001)); value->append(buf); // Stall AppendHumanMicros( write_stall_micros - db_stats_snapshot_.write_stall_micros, human_micros, kHumanMicrosLen, true); snprintf(buf, sizeof(buf), "Interval stall: %s, %.1f percent\n", human_micros, // 10000 = divide by 1M to get secs, then multiply by 100 for pct (write_stall_micros - db_stats_snapshot_.write_stall_micros) / 10000.0 / std::max(interval_seconds_up, 0.001)); value->append(buf); db_stats_snapshot_.seconds_up = seconds_up; db_stats_snapshot_.ingest_bytes = user_bytes_written; db_stats_snapshot_.write_other = write_other; db_stats_snapshot_.write_self = write_self; db_stats_snapshot_.num_keys_written = num_keys_written; db_stats_snapshot_.wal_bytes = wal_bytes; db_stats_snapshot_.wal_synced = wal_synced; db_stats_snapshot_.write_with_wal = write_with_wal; db_stats_snapshot_.write_stall_micros = write_stall_micros; } /** * Dump Compaction Level stats to a map of stat name with "compaction." prefix * to value in double as string. The level in stat name is represented with * a prefix "Lx" where "x" is the level number. A special level "Sum" * represents the sum of a stat for all levels. * The result also contains IO stall counters which keys start with "io_stalls." * and values represent uint64 encoded as strings. */ void InternalStats::DumpCFMapStats( std::map* cf_stats) { CompactionStats compaction_stats_sum(0); std::map> levels_stats; DumpCFMapStats(&levels_stats, &compaction_stats_sum); for (auto const& level_ent : levels_stats) { auto level_str = level_ent.first == -1 ? "Sum" : "L" + ToString(level_ent.first); for (auto const& stat_ent : level_ent.second) { auto stat_type = stat_ent.first; auto key_str = "compaction." + level_str + "." + InternalStats::compaction_level_stats.at(stat_type).property_name; (*cf_stats)[key_str] = std::to_string(stat_ent.second); } } DumpCFMapStatsIOStalls(cf_stats); } void InternalStats::DumpCFMapStats( std::map>* levels_stats, CompactionStats* compaction_stats_sum) { const VersionStorageInfo* vstorage = cfd_->current()->storage_info(); int num_levels_to_check = (cfd_->ioptions()->compaction_style != kCompactionStyleFIFO) ? vstorage->num_levels() - 1 : 1; // Compaction scores are sorted based on its value. Restore them to the // level order std::vector compaction_score(number_levels_, 0); for (int i = 0; i < num_levels_to_check; ++i) { compaction_score[vstorage->CompactionScoreLevel(i)] = vstorage->CompactionScore(i); } // Count # of files being compacted for each level std::vector files_being_compacted(number_levels_, 0); for (int level = 0; level < number_levels_; ++level) { for (auto* f : vstorage->LevelFiles(level)) { if (f->being_compacted) { ++files_being_compacted[level]; } } } int total_files = 0; int total_files_being_compacted = 0; double total_file_size = 0; uint64_t flush_ingest = cf_stats_value_[BYTES_FLUSHED]; uint64_t add_file_ingest = cf_stats_value_[BYTES_INGESTED_ADD_FILE]; uint64_t curr_ingest = flush_ingest + add_file_ingest; for (int level = 0; level < number_levels_; level++) { int files = vstorage->NumLevelFiles(level); total_files += files; total_files_being_compacted += files_being_compacted[level]; if (comp_stats_[level].micros > 0 || files > 0) { compaction_stats_sum->Add(comp_stats_[level]); total_file_size += vstorage->NumLevelBytes(level); uint64_t input_bytes; if (level == 0) { input_bytes = curr_ingest; } else { input_bytes = comp_stats_[level].bytes_read_non_output_levels; } double w_amp = (input_bytes == 0) ? 0.0 : static_cast(comp_stats_[level].bytes_written) / input_bytes; std::map level_stats; PrepareLevelStats(&level_stats, files, files_being_compacted[level], static_cast(vstorage->NumLevelBytes(level)), compaction_score[level], w_amp, comp_stats_[level]); (*levels_stats)[level] = level_stats; } } // Cumulative summary double w_amp = compaction_stats_sum->bytes_written / static_cast(curr_ingest + 1); // Stats summary across levels std::map sum_stats; PrepareLevelStats(&sum_stats, total_files, total_files_being_compacted, total_file_size, 0, w_amp, *compaction_stats_sum); (*levels_stats)[-1] = sum_stats; // -1 is for the Sum level } void InternalStats::DumpCFMapStatsIOStalls( std::map* cf_stats) { (*cf_stats)["io_stalls.level0_slowdown"] = std::to_string(cf_stats_count_[LEVEL0_SLOWDOWN_TOTAL]); (*cf_stats)["io_stalls.level0_slowdown_with_compaction"] = std::to_string(cf_stats_count_[LEVEL0_SLOWDOWN_WITH_COMPACTION]); (*cf_stats)["io_stalls.level0_numfiles"] = std::to_string(cf_stats_count_[LEVEL0_NUM_FILES_TOTAL]); (*cf_stats)["io_stalls.level0_numfiles_with_compaction"] = std::to_string(cf_stats_count_[LEVEL0_NUM_FILES_WITH_COMPACTION]); (*cf_stats)["io_stalls.stop_for_pending_compaction_bytes"] = std::to_string(cf_stats_count_[HARD_PENDING_COMPACTION_BYTES_LIMIT]); (*cf_stats)["io_stalls.slowdown_for_pending_compaction_bytes"] = std::to_string(cf_stats_count_[SOFT_PENDING_COMPACTION_BYTES_LIMIT]); (*cf_stats)["io_stalls.memtable_compaction"] = std::to_string(cf_stats_count_[MEMTABLE_COMPACTION]); (*cf_stats)["io_stalls.memtable_slowdown"] = std::to_string(cf_stats_count_[MEMTABLE_SLOWDOWN]); uint64_t total_stop = cf_stats_count_[LEVEL0_NUM_FILES_TOTAL] + cf_stats_count_[HARD_PENDING_COMPACTION_BYTES_LIMIT] + cf_stats_count_[MEMTABLE_COMPACTION]; uint64_t total_slowdown = cf_stats_count_[LEVEL0_SLOWDOWN_TOTAL] + cf_stats_count_[SOFT_PENDING_COMPACTION_BYTES_LIMIT] + cf_stats_count_[MEMTABLE_SLOWDOWN]; (*cf_stats)["io_stalls.total_stop"] = std::to_string(total_stop); (*cf_stats)["io_stalls.total_slowdown"] = std::to_string(total_slowdown); } void InternalStats::DumpCFStats(std::string* value) { DumpCFStatsNoFileHistogram(value); DumpCFFileHistogram(value); } void InternalStats::DumpCFStatsNoFileHistogram(std::string* value) { char buf[2000]; // Per-ColumnFamily stats PrintLevelStatsHeader(buf, sizeof(buf), cfd_->GetName()); value->append(buf); // Print stats for each level std::map> levels_stats; CompactionStats compaction_stats_sum(0); DumpCFMapStats(&levels_stats, &compaction_stats_sum); for (int l = 0; l < number_levels_; ++l) { if (levels_stats.find(l) != levels_stats.end()) { PrintLevelStats(buf, sizeof(buf), "L" + ToString(l), levels_stats[l]); value->append(buf); } } // Print sum of level stats PrintLevelStats(buf, sizeof(buf), "Sum", levels_stats[-1]); value->append(buf); uint64_t flush_ingest = cf_stats_value_[BYTES_FLUSHED]; uint64_t add_file_ingest = cf_stats_value_[BYTES_INGESTED_ADD_FILE]; uint64_t ingest_files_addfile = cf_stats_value_[INGESTED_NUM_FILES_TOTAL]; uint64_t ingest_l0_files_addfile = cf_stats_value_[INGESTED_LEVEL0_NUM_FILES_TOTAL]; uint64_t ingest_keys_addfile = cf_stats_value_[INGESTED_NUM_KEYS_TOTAL]; // Cumulative summary uint64_t total_stall_count = cf_stats_count_[LEVEL0_SLOWDOWN_TOTAL] + cf_stats_count_[LEVEL0_NUM_FILES_TOTAL] + cf_stats_count_[SOFT_PENDING_COMPACTION_BYTES_LIMIT] + cf_stats_count_[HARD_PENDING_COMPACTION_BYTES_LIMIT] + cf_stats_count_[MEMTABLE_COMPACTION] + cf_stats_count_[MEMTABLE_SLOWDOWN]; // Interval summary uint64_t interval_flush_ingest = flush_ingest - cf_stats_snapshot_.ingest_bytes_flush; uint64_t interval_add_file_inget = add_file_ingest - cf_stats_snapshot_.ingest_bytes_addfile; uint64_t interval_ingest = interval_flush_ingest + interval_add_file_inget + 1; CompactionStats interval_stats(compaction_stats_sum); interval_stats.Subtract(cf_stats_snapshot_.comp_stats); double w_amp = interval_stats.bytes_written / static_cast(interval_ingest); PrintLevelStats(buf, sizeof(buf), "Int", 0, 0, 0, 0, w_amp, interval_stats); value->append(buf); double seconds_up = (env_->NowMicros() - started_at_ + 1) / kMicrosInSec; double interval_seconds_up = seconds_up - cf_stats_snapshot_.seconds_up; snprintf(buf, sizeof(buf), "Uptime(secs): %.1f total, %.1f interval\n", seconds_up, interval_seconds_up); value->append(buf); snprintf(buf, sizeof(buf), "Flush(GB): cumulative %.3f, interval %.3f\n", flush_ingest / kGB, interval_flush_ingest / kGB); value->append(buf); snprintf(buf, sizeof(buf), "AddFile(GB): cumulative %.3f, interval %.3f\n", add_file_ingest / kGB, interval_add_file_inget / kGB); value->append(buf); uint64_t interval_ingest_files_addfile = ingest_files_addfile - cf_stats_snapshot_.ingest_files_addfile; snprintf(buf, sizeof(buf), "AddFile(Total Files): cumulative %" PRIu64 ", interval %" PRIu64 "\n", ingest_files_addfile, interval_ingest_files_addfile); value->append(buf); uint64_t interval_ingest_l0_files_addfile = ingest_l0_files_addfile - cf_stats_snapshot_.ingest_l0_files_addfile; snprintf(buf, sizeof(buf), "AddFile(L0 Files): cumulative %" PRIu64 ", interval %" PRIu64 "\n", ingest_l0_files_addfile, interval_ingest_l0_files_addfile); value->append(buf); uint64_t interval_ingest_keys_addfile = ingest_keys_addfile - cf_stats_snapshot_.ingest_keys_addfile; snprintf(buf, sizeof(buf), "AddFile(Keys): cumulative %" PRIu64 ", interval %" PRIu64 "\n", ingest_keys_addfile, interval_ingest_keys_addfile); value->append(buf); // Compact uint64_t compact_bytes_read = 0; uint64_t compact_bytes_write = 0; uint64_t compact_micros = 0; for (int level = 0; level < number_levels_; level++) { compact_bytes_read += comp_stats_[level].bytes_read_output_level + comp_stats_[level].bytes_read_non_output_levels; compact_bytes_write += comp_stats_[level].bytes_written; compact_micros += comp_stats_[level].micros; } snprintf(buf, sizeof(buf), "Cumulative compaction: %.2f GB write, %.2f MB/s write, " "%.2f GB read, %.2f MB/s read, %.1f seconds\n", compact_bytes_write / kGB, compact_bytes_write / kMB / seconds_up, compact_bytes_read / kGB, compact_bytes_read / kMB / seconds_up, compact_micros / kMicrosInSec); value->append(buf); // Compaction interval uint64_t interval_compact_bytes_write = compact_bytes_write - cf_stats_snapshot_.compact_bytes_write; uint64_t interval_compact_bytes_read = compact_bytes_read - cf_stats_snapshot_.compact_bytes_read; uint64_t interval_compact_micros = compact_micros - cf_stats_snapshot_.compact_micros; snprintf( buf, sizeof(buf), "Interval compaction: %.2f GB write, %.2f MB/s write, " "%.2f GB read, %.2f MB/s read, %.1f seconds\n", interval_compact_bytes_write / kGB, interval_compact_bytes_write / kMB / std::max(interval_seconds_up, 0.001), interval_compact_bytes_read / kGB, interval_compact_bytes_read / kMB / std::max(interval_seconds_up, 0.001), interval_compact_micros / kMicrosInSec); value->append(buf); cf_stats_snapshot_.compact_bytes_write = compact_bytes_write; cf_stats_snapshot_.compact_bytes_read = compact_bytes_read; cf_stats_snapshot_.compact_micros = compact_micros; snprintf(buf, sizeof(buf), "Stalls(count): %" PRIu64 " level0_slowdown, " "%" PRIu64 " level0_slowdown_with_compaction, " "%" PRIu64 " level0_numfiles, " "%" PRIu64 " level0_numfiles_with_compaction, " "%" PRIu64 " stop for pending_compaction_bytes, " "%" PRIu64 " slowdown for pending_compaction_bytes, " "%" PRIu64 " memtable_compaction, " "%" PRIu64 " memtable_slowdown, " "interval %" PRIu64 " total count\n", cf_stats_count_[LEVEL0_SLOWDOWN_TOTAL], cf_stats_count_[LEVEL0_SLOWDOWN_WITH_COMPACTION], cf_stats_count_[LEVEL0_NUM_FILES_TOTAL], cf_stats_count_[LEVEL0_NUM_FILES_WITH_COMPACTION], cf_stats_count_[HARD_PENDING_COMPACTION_BYTES_LIMIT], cf_stats_count_[SOFT_PENDING_COMPACTION_BYTES_LIMIT], cf_stats_count_[MEMTABLE_COMPACTION], cf_stats_count_[MEMTABLE_SLOWDOWN], total_stall_count - cf_stats_snapshot_.stall_count); value->append(buf); cf_stats_snapshot_.seconds_up = seconds_up; cf_stats_snapshot_.ingest_bytes_flush = flush_ingest; cf_stats_snapshot_.ingest_bytes_addfile = add_file_ingest; cf_stats_snapshot_.ingest_files_addfile = ingest_files_addfile; cf_stats_snapshot_.ingest_l0_files_addfile = ingest_l0_files_addfile; cf_stats_snapshot_.ingest_keys_addfile = ingest_keys_addfile; cf_stats_snapshot_.comp_stats = compaction_stats_sum; cf_stats_snapshot_.stall_count = total_stall_count; } void InternalStats::DumpCFFileHistogram(std::string* value) { char buf[2000]; snprintf(buf, sizeof(buf), "\n** File Read Latency Histogram By Level [%s] **\n", cfd_->GetName().c_str()); value->append(buf); for (int level = 0; level < number_levels_; level++) { if (!file_read_latency_[level].Empty()) { char buf2[5000]; snprintf(buf2, sizeof(buf2), "** Level %d read latency histogram (micros):\n%s\n", level, file_read_latency_[level].ToString().c_str()); value->append(buf2); } } } #else const DBPropertyInfo* GetPropertyInfo(const Slice& property) { return nullptr; } #endif // !ROCKSDB_LITE } // namespace rocksdb