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internal_stats.cc
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internal_stats.cc
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// 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) Facebook, Inc. and its affiliates. All Rights Reserved.
//
// 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"
#include <algorithm>
#include <cinttypes>
#include <cstddef>
#include <limits>
#include <sstream>
#include <string>
#include <utility>
#include <vector>
#include "cache/cache_entry_roles.h"
#include "cache/cache_entry_stats.h"
#include "db/column_family.h"
#include "db/db_impl/db_impl.h"
#include "port/port.h"
#include "rocksdb/system_clock.h"
#include "rocksdb/table.h"
#include "table/block_based/cachable_entry.h"
#include "util/hash_containers.h"
#include "util/string_util.h"
namespace ROCKSDB_NAMESPACE {
const std::map<LevelStatType, LevelStat> 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_CPU_SEC,
LevelStat{"CompMergeCPU", "CompMergeCPU(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"}},
{LevelStatType::R_BLOB_GB, LevelStat{"RblobGB", "Rblob(GB)"}},
{LevelStatType::W_BLOB_GB, LevelStat{"WblobGB", "Wblob(GB)"}},
};
const std::map<InternalStats::InternalDBStatsType, DBStatInfo>
InternalStats::db_stats_type_to_info = {
{InternalStats::kIntStatsWalFileBytes,
DBStatInfo{"db.wal_bytes_written"}},
{InternalStats::kIntStatsWalFileSynced, DBStatInfo{"db.wal_syncs"}},
{InternalStats::kIntStatsBytesWritten,
DBStatInfo{"db.user_bytes_written"}},
{InternalStats::kIntStatsNumKeysWritten,
DBStatInfo{"db.user_keys_written"}},
{InternalStats::kIntStatsWriteDoneByOther,
DBStatInfo{"db.user_writes_by_other"}},
{InternalStats::kIntStatsWriteDoneBySelf,
DBStatInfo{"db.user_writes_by_self"}},
{InternalStats::kIntStatsWriteWithWal,
DBStatInfo{"db.user_writes_with_wal"}},
{InternalStats::kIntStatsWriteStallMicros,
DBStatInfo{"db.user_write_stall_micros"}},
};
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,
const std::string& group_by) {
int written_size =
snprintf(buf, len, "\n** Compaction Stats [%s] **\n", cf_name.c_str());
written_size = std::min(written_size, static_cast<int>(len));
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,
"%s %s %s %s %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
group_by.c_str(), 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_CPU_SEC), hdr(LevelStatType::COMP_COUNT),
hdr(LevelStatType::AVG_SEC), hdr(LevelStatType::KEY_IN),
hdr(LevelStatType::KEY_DROP), hdr(LevelStatType::R_BLOB_GB),
hdr(LevelStatType::W_BLOB_GB));
written_size += line_size;
written_size = std::min(written_size, static_cast<int>(len));
snprintf(buf + written_size, len - written_size, "%s\n",
std::string(line_size, '-').c_str());
}
void PrepareLevelStats(std::map<LevelStatType, double>* level_stats,
int num_files, int being_compacted,
double total_file_size, double score, double w_amp,
const InternalStats::CompactionStats& stats) {
const uint64_t bytes_read = stats.bytes_read_non_output_levels +
stats.bytes_read_output_level +
stats.bytes_read_blob;
const uint64_t bytes_written = stats.bytes_written + stats.bytes_written_blob;
const int64_t bytes_new = stats.bytes_written - stats.bytes_read_output_level;
const 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] = bytes_written / kMB / elapsed;
(*level_stats)[LevelStatType::COMP_SEC] = stats.micros / kMicrosInSec;
(*level_stats)[LevelStatType::COMP_CPU_SEC] = stats.cpu_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<double>(stats.num_input_records);
(*level_stats)[LevelStatType::KEY_DROP] =
static_cast<double>(stats.num_dropped_records);
(*level_stats)[LevelStatType::R_BLOB_GB] = stats.bytes_read_blob / kGB;
(*level_stats)[LevelStatType::W_BLOB_GB] = stats.bytes_written_blob / kGB;
}
void PrintLevelStats(char* buf, size_t len, const std::string& name,
const std::map<LevelStatType, double>& 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) */
"%9.2f " /* Comp(sec) */
"%17.2f " /* CompMergeCPU(sec) */
"%9d " /* Comp(cnt) */
"%8.3f " /* Avg(sec) */
"%7s " /* KeyIn */
"%6s " /* KeyDrop */
"%9.1f " /* Rblob(GB) */
"%9.1f\n", /* Wblob(GB) */
name.c_str(), static_cast<int>(stat_value.at(LevelStatType::NUM_FILES)),
static_cast<int>(stat_value.at(LevelStatType::COMPACTED_FILES)),
BytesToHumanString(
static_cast<uint64_t>(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),
stat_value.at(LevelStatType::COMP_CPU_SEC),
static_cast<int>(stat_value.at(LevelStatType::COMP_COUNT)),
stat_value.at(LevelStatType::AVG_SEC),
NumberToHumanString(
static_cast<std::int64_t>(stat_value.at(LevelStatType::KEY_IN)))
.c_str(),
NumberToHumanString(
static_cast<std::int64_t>(stat_value.at(LevelStatType::KEY_DROP)))
.c_str(),
stat_value.at(LevelStatType::R_BLOB_GB),
stat_value.at(LevelStatType::W_BLOB_GB));
}
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<LevelStatType, double> 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<Slice, Slice> 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 block_cache_entry_stats = "block-cache-entry-stats";
static const std::string fast_block_cache_entry_stats =
"fast-block-cache-entry-stats";
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 oldest_snapshot_sequence = "oldest-snapshot-sequence";
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_str = "min-log-number-to-keep";
static const std::string min_obsolete_sst_number_to_keep_str =
"min-obsolete-sst-number-to-keep";
static const std::string base_level_str = "base-level";
static const std::string total_sst_files_size = "total-sst-files-size";
static const std::string live_sst_files_size = "live-sst-files-size";
static const std::string live_sst_files_size_at_temperature =
"live-sst-files-size-at-temperature";
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";
static const std::string estimate_oldest_key_time = "estimate-oldest-key-time";
static const std::string block_cache_capacity = "block-cache-capacity";
static const std::string block_cache_usage = "block-cache-usage";
static const std::string block_cache_pinned_usage = "block-cache-pinned-usage";
static const std::string options_statistics = "options-statistics";
static const std::string num_blob_files = "num-blob-files";
static const std::string blob_stats = "blob-stats";
static const std::string total_blob_file_size = "total-blob-file-size";
static const std::string live_blob_file_size = "live-blob-file-size";
static const std::string live_blob_file_garbage_size =
"live-blob-file-garbage-size";
static const std::string blob_cache_capacity = "blob-cache-capacity";
static const std::string blob_cache_usage = "blob-cache-usage";
static const std::string blob_cache_pinned_usage = "blob-cache-pinned-usage";
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::kBlockCacheEntryStats =
rocksdb_prefix + block_cache_entry_stats;
const std::string DB::Properties::kFastBlockCacheEntryStats =
rocksdb_prefix + fast_block_cache_entry_stats;
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::kOldestSnapshotSequence =
rocksdb_prefix + oldest_snapshot_sequence;
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_str;
const std::string DB::Properties::kMinObsoleteSstNumberToKeep =
rocksdb_prefix + min_obsolete_sst_number_to_keep_str;
const std::string DB::Properties::kTotalSstFilesSize =
rocksdb_prefix + total_sst_files_size;
const std::string DB::Properties::kLiveSstFilesSize =
rocksdb_prefix + live_sst_files_size;
const std::string DB::Properties::kBaseLevel = rocksdb_prefix + base_level_str;
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::string DB::Properties::kEstimateOldestKeyTime =
rocksdb_prefix + estimate_oldest_key_time;
const std::string DB::Properties::kBlockCacheCapacity =
rocksdb_prefix + block_cache_capacity;
const std::string DB::Properties::kBlockCacheUsage =
rocksdb_prefix + block_cache_usage;
const std::string DB::Properties::kBlockCachePinnedUsage =
rocksdb_prefix + block_cache_pinned_usage;
const std::string DB::Properties::kOptionsStatistics =
rocksdb_prefix + options_statistics;
const std::string DB::Properties::kLiveSstFilesSizeAtTemperature =
rocksdb_prefix + live_sst_files_size_at_temperature;
const std::string DB::Properties::kNumBlobFiles =
rocksdb_prefix + num_blob_files;
const std::string DB::Properties::kBlobStats = rocksdb_prefix + blob_stats;
const std::string DB::Properties::kTotalBlobFileSize =
rocksdb_prefix + total_blob_file_size;
const std::string DB::Properties::kLiveBlobFileSize =
rocksdb_prefix + live_blob_file_size;
const std::string DB::Properties::kLiveBlobFileGarbageSize =
rocksdb_prefix + live_blob_file_garbage_size;
const std::string DB::Properties::kBlobCacheCapacity =
rocksdb_prefix + blob_cache_capacity;
const std::string DB::Properties::kBlobCacheUsage =
rocksdb_prefix + blob_cache_usage;
const std::string DB::Properties::kBlobCachePinnedUsage =
rocksdb_prefix + blob_cache_pinned_usage;
const std::string InternalStats::kPeriodicCFStats =
DB::Properties::kCFStats + ".periodic";
const int InternalStats::kMaxNoChangePeriodSinceDump = 8;
const UnorderedMap<std::string, DBPropertyInfo>
InternalStats::ppt_name_to_info = {
{DB::Properties::kNumFilesAtLevelPrefix,
{false, &InternalStats::HandleNumFilesAtLevel, nullptr, nullptr,
nullptr}},
{DB::Properties::kCompressionRatioAtLevelPrefix,
{false, &InternalStats::HandleCompressionRatioAtLevelPrefix, nullptr,
nullptr, nullptr}},
{DB::Properties::kLevelStats,
{false, &InternalStats::HandleLevelStats, nullptr, nullptr, nullptr}},
{DB::Properties::kStats,
{false, &InternalStats::HandleStats, nullptr, nullptr, nullptr}},
{DB::Properties::kCFStats,
{false, &InternalStats::HandleCFStats, nullptr,
&InternalStats::HandleCFMapStats, nullptr}},
{InternalStats::kPeriodicCFStats,
{false, &InternalStats::HandleCFStatsPeriodic, nullptr, nullptr,
nullptr}},
{DB::Properties::kCFStatsNoFileHistogram,
{false, &InternalStats::HandleCFStatsNoFileHistogram, nullptr, nullptr,
nullptr}},
{DB::Properties::kCFFileHistogram,
{false, &InternalStats::HandleCFFileHistogram, nullptr, nullptr,
nullptr}},
{DB::Properties::kDBStats,
{false, &InternalStats::HandleDBStats, nullptr,
&InternalStats::HandleDBMapStats, nullptr}},
{DB::Properties::kBlockCacheEntryStats,
{true, &InternalStats::HandleBlockCacheEntryStats, nullptr,
&InternalStats::HandleBlockCacheEntryStatsMap, nullptr}},
{DB::Properties::kFastBlockCacheEntryStats,
{true, &InternalStats::HandleFastBlockCacheEntryStats, nullptr,
&InternalStats::HandleFastBlockCacheEntryStatsMap, nullptr}},
{DB::Properties::kSSTables,
{false, &InternalStats::HandleSsTables, nullptr, nullptr, nullptr}},
{DB::Properties::kAggregatedTableProperties,
{false, &InternalStats::HandleAggregatedTableProperties, nullptr,
&InternalStats::HandleAggregatedTablePropertiesMap, nullptr}},
{DB::Properties::kAggregatedTablePropertiesAtLevel,
{false, &InternalStats::HandleAggregatedTablePropertiesAtLevel,
nullptr, &InternalStats::HandleAggregatedTablePropertiesAtLevelMap,
nullptr}},
{DB::Properties::kNumImmutableMemTable,
{false, nullptr, &InternalStats::HandleNumImmutableMemTable, nullptr,
nullptr}},
{DB::Properties::kNumImmutableMemTableFlushed,
{false, nullptr, &InternalStats::HandleNumImmutableMemTableFlushed,
nullptr, nullptr}},
{DB::Properties::kMemTableFlushPending,
{false, nullptr, &InternalStats::HandleMemTableFlushPending, nullptr,
nullptr}},
{DB::Properties::kCompactionPending,
{false, nullptr, &InternalStats::HandleCompactionPending, nullptr,
nullptr}},
{DB::Properties::kBackgroundErrors,
{false, nullptr, &InternalStats::HandleBackgroundErrors, nullptr,
nullptr}},
{DB::Properties::kCurSizeActiveMemTable,
{false, nullptr, &InternalStats::HandleCurSizeActiveMemTable, nullptr,
nullptr}},
{DB::Properties::kCurSizeAllMemTables,
{false, nullptr, &InternalStats::HandleCurSizeAllMemTables, nullptr,
nullptr}},
{DB::Properties::kSizeAllMemTables,
{false, nullptr, &InternalStats::HandleSizeAllMemTables, nullptr,
nullptr}},
{DB::Properties::kNumEntriesActiveMemTable,
{false, nullptr, &InternalStats::HandleNumEntriesActiveMemTable,
nullptr, nullptr}},
{DB::Properties::kNumEntriesImmMemTables,
{false, nullptr, &InternalStats::HandleNumEntriesImmMemTables, nullptr,
nullptr}},
{DB::Properties::kNumDeletesActiveMemTable,
{false, nullptr, &InternalStats::HandleNumDeletesActiveMemTable,
nullptr, nullptr}},
{DB::Properties::kNumDeletesImmMemTables,
{false, nullptr, &InternalStats::HandleNumDeletesImmMemTables, nullptr,
nullptr}},
{DB::Properties::kEstimateNumKeys,
{false, nullptr, &InternalStats::HandleEstimateNumKeys, nullptr,
nullptr}},
{DB::Properties::kEstimateTableReadersMem,
{true, nullptr, &InternalStats::HandleEstimateTableReadersMem, nullptr,
nullptr}},
{DB::Properties::kIsFileDeletionsEnabled,
{false, nullptr, &InternalStats::HandleIsFileDeletionsEnabled, nullptr,
nullptr}},
{DB::Properties::kNumSnapshots,
{false, nullptr, &InternalStats::HandleNumSnapshots, nullptr,
nullptr}},
{DB::Properties::kOldestSnapshotTime,
{false, nullptr, &InternalStats::HandleOldestSnapshotTime, nullptr,
nullptr}},
{DB::Properties::kOldestSnapshotSequence,
{false, nullptr, &InternalStats::HandleOldestSnapshotSequence, nullptr,
nullptr}},
{DB::Properties::kNumLiveVersions,
{false, nullptr, &InternalStats::HandleNumLiveVersions, nullptr,
nullptr}},
{DB::Properties::kCurrentSuperVersionNumber,
{false, nullptr, &InternalStats::HandleCurrentSuperVersionNumber,
nullptr, nullptr}},
{DB::Properties::kEstimateLiveDataSize,
{true, nullptr, &InternalStats::HandleEstimateLiveDataSize, nullptr,
nullptr}},
{DB::Properties::kMinLogNumberToKeep,
{false, nullptr, &InternalStats::HandleMinLogNumberToKeep, nullptr,
nullptr}},
{DB::Properties::kMinObsoleteSstNumberToKeep,
{false, nullptr, &InternalStats::HandleMinObsoleteSstNumberToKeep,
nullptr, nullptr}},
{DB::Properties::kBaseLevel,
{false, nullptr, &InternalStats::HandleBaseLevel, nullptr, nullptr}},
{DB::Properties::kTotalSstFilesSize,
{false, nullptr, &InternalStats::HandleTotalSstFilesSize, nullptr,
nullptr}},
{DB::Properties::kLiveSstFilesSize,
{false, nullptr, &InternalStats::HandleLiveSstFilesSize, nullptr,
nullptr}},
{DB::Properties::kLiveSstFilesSizeAtTemperature,
{false, &InternalStats::HandleLiveSstFilesSizeAtTemperature, nullptr,
nullptr, nullptr}},
{DB::Properties::kEstimatePendingCompactionBytes,
{false, nullptr, &InternalStats::HandleEstimatePendingCompactionBytes,
nullptr, nullptr}},
{DB::Properties::kNumRunningFlushes,
{false, nullptr, &InternalStats::HandleNumRunningFlushes, nullptr,
nullptr}},
{DB::Properties::kNumRunningCompactions,
{false, nullptr, &InternalStats::HandleNumRunningCompactions, nullptr,
nullptr}},
{DB::Properties::kActualDelayedWriteRate,
{false, nullptr, &InternalStats::HandleActualDelayedWriteRate, nullptr,
nullptr}},
{DB::Properties::kIsWriteStopped,
{false, nullptr, &InternalStats::HandleIsWriteStopped, nullptr,
nullptr}},
{DB::Properties::kEstimateOldestKeyTime,
{false, nullptr, &InternalStats::HandleEstimateOldestKeyTime, nullptr,
nullptr}},
{DB::Properties::kBlockCacheCapacity,
{false, nullptr, &InternalStats::HandleBlockCacheCapacity, nullptr,
nullptr}},
{DB::Properties::kBlockCacheUsage,
{false, nullptr, &InternalStats::HandleBlockCacheUsage, nullptr,
nullptr}},
{DB::Properties::kBlockCachePinnedUsage,
{false, nullptr, &InternalStats::HandleBlockCachePinnedUsage, nullptr,
nullptr}},
{DB::Properties::kOptionsStatistics,
{true, nullptr, nullptr, nullptr,
&DBImpl::GetPropertyHandleOptionsStatistics}},
{DB::Properties::kNumBlobFiles,
{false, nullptr, &InternalStats::HandleNumBlobFiles, nullptr,
nullptr}},
{DB::Properties::kBlobStats,
{false, &InternalStats::HandleBlobStats, nullptr, nullptr, nullptr}},
{DB::Properties::kTotalBlobFileSize,
{false, nullptr, &InternalStats::HandleTotalBlobFileSize, nullptr,
nullptr}},
{DB::Properties::kLiveBlobFileSize,
{false, nullptr, &InternalStats::HandleLiveBlobFileSize, nullptr,
nullptr}},
{DB::Properties::kLiveBlobFileGarbageSize,
{false, nullptr, &InternalStats::HandleLiveBlobFileGarbageSize,
nullptr, nullptr}},
{DB::Properties::kBlobCacheCapacity,
{false, nullptr, &InternalStats::HandleBlobCacheCapacity, nullptr,
nullptr}},
{DB::Properties::kBlobCacheUsage,
{false, nullptr, &InternalStats::HandleBlobCacheUsage, nullptr,
nullptr}},
{DB::Properties::kBlobCachePinnedUsage,
{false, nullptr, &InternalStats::HandleBlobCachePinnedUsage, nullptr,
nullptr}},
};
InternalStats::InternalStats(int num_levels, SystemClock* clock,
ColumnFamilyData* cfd)
: db_stats_{},
cf_stats_value_{},
cf_stats_count_{},
comp_stats_(num_levels),
comp_stats_by_pri_(Env::Priority::TOTAL),
file_read_latency_(num_levels),
has_cf_change_since_dump_(true),
bg_error_count_(0),
number_levels_(num_levels),
clock_(clock),
cfd_(cfd),
started_at_(clock->NowMicros()) {
Cache* block_cache = GetBlockCacheForStats();
if (block_cache) {
// Extract or create stats collector. Could fail in rare cases.
Status s = CacheEntryStatsCollector<CacheEntryRoleStats>::GetShared(
block_cache, clock_, &cache_entry_stats_collector_);
if (s.ok()) {
assert(cache_entry_stats_collector_);
} else {
assert(!cache_entry_stats_collector_);
}
}
}
void InternalStats::TEST_GetCacheEntryRoleStats(CacheEntryRoleStats* stats,
bool foreground) {
CollectCacheEntryStats(foreground);
if (cache_entry_stats_collector_) {
cache_entry_stats_collector_->GetStats(stats);
}
}
void InternalStats::CollectCacheEntryStats(bool foreground) {
// This function is safe to call from any thread because
// cache_entry_stats_collector_ field is const after constructor
// and ->GetStats does its own synchronization, which also suffices for
// cache_entry_stats_.
if (!cache_entry_stats_collector_) {
return; // nothing to do (e.g. no block cache)
}
// For "background" collections, strictly cap the collection time by
// expanding effective cache TTL. For foreground, be more aggressive about
// getting latest data.
int min_interval_seconds = foreground ? 10 : 180;
// 1/500 = max of 0.2% of one CPU thread
int min_interval_factor = foreground ? 10 : 500;
cache_entry_stats_collector_->CollectStats(min_interval_seconds,
min_interval_factor);
}
std::function<void()> Blah() {
static int x = 42;
return [&]() { ++x; };
}
std::function<void(const Slice& key, Cache::ObjectPtr value, size_t charge,
const Cache::CacheItemHelper* helper)>
InternalStats::CacheEntryRoleStats::GetEntryCallback() {
return [&](const Slice& /*key*/, Cache::ObjectPtr /*value*/, size_t charge,
const Cache::CacheItemHelper* helper) -> void {
size_t role_idx =
static_cast<size_t>(helper ? helper->role : CacheEntryRole::kMisc);
entry_counts[role_idx]++;
total_charges[role_idx] += charge;
};
}
void InternalStats::CacheEntryRoleStats::BeginCollection(
Cache* cache, SystemClock*, uint64_t start_time_micros) {
Clear();
last_start_time_micros_ = start_time_micros;
++collection_count;
std::ostringstream str;
str << cache->Name() << "@" << static_cast<void*>(cache) << "#"
<< port::GetProcessID();
cache_id = str.str();
cache_capacity = cache->GetCapacity();
cache_usage = cache->GetUsage();
table_size = cache->GetTableAddressCount();
occupancy = cache->GetOccupancyCount();
}
void InternalStats::CacheEntryRoleStats::EndCollection(
Cache*, SystemClock*, uint64_t end_time_micros) {
last_end_time_micros_ = end_time_micros;
}
void InternalStats::CacheEntryRoleStats::SkippedCollection() {
++copies_of_last_collection;
}
uint64_t InternalStats::CacheEntryRoleStats::GetLastDurationMicros() const {
if (last_end_time_micros_ > last_start_time_micros_) {
return last_end_time_micros_ - last_start_time_micros_;
} else {
return 0U;
}
}
std::string InternalStats::CacheEntryRoleStats::ToString(
SystemClock* clock) const {
std::ostringstream str;
str << "Block cache " << cache_id
<< " capacity: " << BytesToHumanString(cache_capacity)
<< " usage: " << BytesToHumanString(cache_usage)
<< " table_size: " << table_size << " occupancy: " << occupancy
<< " collections: " << collection_count
<< " last_copies: " << copies_of_last_collection
<< " last_secs: " << (GetLastDurationMicros() / 1000000.0)
<< " secs_since: "
<< ((clock->NowMicros() - last_end_time_micros_) / 1000000U) << "\n";
str << "Block cache entry stats(count,size,portion):";
for (size_t i = 0; i < kNumCacheEntryRoles; ++i) {
if (entry_counts[i] > 0) {
str << " " << kCacheEntryRoleToCamelString[i] << "(" << entry_counts[i]
<< "," << BytesToHumanString(total_charges[i]) << ","
<< (100.0 * total_charges[i] / cache_capacity) << "%)";
}
}
str << "\n";
return str.str();
}
void InternalStats::CacheEntryRoleStats::ToMap(
std::map<std::string, std::string>* values, SystemClock* clock) const {
values->clear();
auto& v = *values;
v[BlockCacheEntryStatsMapKeys::CacheId()] = cache_id;
v[BlockCacheEntryStatsMapKeys::CacheCapacityBytes()] =
std::to_string(cache_capacity);
v[BlockCacheEntryStatsMapKeys::LastCollectionDurationSeconds()] =
std::to_string(GetLastDurationMicros() / 1000000.0);
v[BlockCacheEntryStatsMapKeys::LastCollectionAgeSeconds()] =
std::to_string((clock->NowMicros() - last_end_time_micros_) / 1000000U);
for (size_t i = 0; i < kNumCacheEntryRoles; ++i) {
auto role = static_cast<CacheEntryRole>(i);
v[BlockCacheEntryStatsMapKeys::EntryCount(role)] =
std::to_string(entry_counts[i]);
v[BlockCacheEntryStatsMapKeys::UsedBytes(role)] =
std::to_string(total_charges[i]);
v[BlockCacheEntryStatsMapKeys::UsedPercent(role)] =
std::to_string(100.0 * total_charges[i] / cache_capacity);
}
}
bool InternalStats::HandleBlockCacheEntryStatsInternal(std::string* value,
bool fast) {
if (!cache_entry_stats_collector_) {
return false;
}
CollectCacheEntryStats(!fast /* foreground */);
CacheEntryRoleStats stats;
cache_entry_stats_collector_->GetStats(&stats);
*value = stats.ToString(clock_);
return true;
}
bool InternalStats::HandleBlockCacheEntryStatsMapInternal(
std::map<std::string, std::string>* values, bool fast) {
if (!cache_entry_stats_collector_) {
return false;
}
CollectCacheEntryStats(!fast /* foreground */);
CacheEntryRoleStats stats;
cache_entry_stats_collector_->GetStats(&stats);
stats.ToMap(values, clock_);
return true;
}
bool InternalStats::HandleBlockCacheEntryStats(std::string* value,
Slice /*suffix*/) {
return HandleBlockCacheEntryStatsInternal(value, false /* fast */);
}
bool InternalStats::HandleBlockCacheEntryStatsMap(
std::map<std::string, std::string>* values, Slice /*suffix*/) {
return HandleBlockCacheEntryStatsMapInternal(values, false /* fast */);
}
bool InternalStats::HandleFastBlockCacheEntryStats(std::string* value,
Slice /*suffix*/) {
return HandleBlockCacheEntryStatsInternal(value, true /* fast */);
}
bool InternalStats::HandleFastBlockCacheEntryStatsMap(
std::map<std::string, std::string>* values, Slice /*suffix*/) {
return HandleBlockCacheEntryStatsMapInternal(values, true /* fast */);
}
bool InternalStats::HandleLiveSstFilesSizeAtTemperature(std::string* value,
Slice suffix) {
uint64_t temperature;
bool ok = ConsumeDecimalNumber(&suffix, &temperature) && suffix.empty();
if (!ok) {
return false;
}
uint64_t size = 0;
const auto* vstorage = cfd_->current()->storage_info();
for (int level = 0; level < vstorage->num_levels(); level++) {
for (const auto& file_meta : vstorage->LevelFiles(level)) {
if (static_cast<uint8_t>(file_meta->temperature) == temperature) {
size += file_meta->fd.GetFileSize();
}
}
}
*value = std::to_string(size);
return true;
}
bool InternalStats::HandleNumBlobFiles(uint64_t* value, DBImpl* /*db*/,
Version* /*version*/) {
assert(value);
assert(cfd_);
const auto* current = cfd_->current();
assert(current);
const auto* vstorage = current->storage_info();
assert(vstorage);
const auto& blob_files = vstorage->GetBlobFiles();
*value = blob_files.size();
return true;
}
bool InternalStats::HandleBlobStats(std::string* value, Slice /*suffix*/) {
assert(value);
assert(cfd_);
const auto* current = cfd_->current();
assert(current);
const auto* vstorage = current->storage_info();
assert(vstorage);
const auto blob_st = vstorage->GetBlobStats();
std::ostringstream oss;
oss << "Number of blob files: " << vstorage->GetBlobFiles().size()
<< "\nTotal size of blob files: " << blob_st.total_file_size
<< "\nTotal size of garbage in blob files: " << blob_st.total_garbage_size
<< "\nBlob file space amplification: " << blob_st.space_amp << '\n';
value->append(oss.str());
return true;
}
bool InternalStats::HandleTotalBlobFileSize(uint64_t* value, DBImpl* /*db*/,
Version* /*version*/) {
assert(value);
assert(cfd_);
*value = cfd_->GetTotalBlobFileSize();
return true;
}
bool InternalStats::HandleLiveBlobFileSize(uint64_t* value, DBImpl* /*db*/,
Version* /*version*/) {
assert(value);
assert(cfd_);
const auto* current = cfd_->current();
assert(current);
const auto* vstorage = current->storage_info();
assert(vstorage);
*value = vstorage->GetBlobStats().total_file_size;
return true;
}
bool InternalStats::HandleLiveBlobFileGarbageSize(uint64_t* value,
DBImpl* /*db*/,
Version* /*version*/) {
assert(value);
assert(cfd_);
const auto* current = cfd_->current();
assert(current);
const auto* vstorage = current->storage_info();
assert(vstorage);
*value = vstorage->GetBlobStats().total_garbage_size;
return true;
}
Cache* InternalStats::GetBlobCacheForStats() {
return cfd_->ioptions()->blob_cache.get();
}
bool InternalStats::HandleBlobCacheCapacity(uint64_t* value, DBImpl* /*db*/,
Version* /*version*/) {
Cache* blob_cache = GetBlobCacheForStats();
if (blob_cache) {
*value = static_cast<uint64_t>(blob_cache->GetCapacity());
return true;
}
return false;
}
bool InternalStats::HandleBlobCacheUsage(uint64_t* value, DBImpl* /*db*/,
Version* /*version*/) {
Cache* blob_cache = GetBlobCacheForStats();
if (blob_cache) {
*value = static_cast<uint64_t>(blob_cache->GetUsage());
return true;
}
return false;
}
bool InternalStats::HandleBlobCachePinnedUsage(uint64_t* value, DBImpl* /*db*/,
Version* /*version*/) {
Cache* blob_cache = GetBlobCacheForStats();
if (blob_cache) {
*value = static_cast<uint64_t>(blob_cache->GetPinnedUsage());
return true;
}
return false;
}
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<std::string, std::string>* value) {
assert(value != nullptr);
assert(property_info.handle_map != nullptr);
Slice arg = GetPropertyNameAndArg(property).second;
return (this->*(property_info.handle_map))(value, arg);
}
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<int>(level) >= number_levels_) {
return false;
} else {
char buf[100];
snprintf(buf, sizeof(buf), "%d",
vstorage->NumLevelFiles(static_cast<int>(level)));
*value = buf;
return true;
}
}
bool InternalStats::HandleCompressionRatioAtLevelPrefix(std::string* value,