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rocksdb/db/internal_stats.cc
mrambacher 12f1137355 Add a SystemClock class to capture the time functions of an Env (#7858) 
Summary:
Introduces and uses a SystemClock class to RocksDB.  This class contains the time-related functions of an Env and these functions can be redirected from the Env to the SystemClock.

Many of the places that used an Env (Timer, PerfStepTimer, RepeatableThread, RateLimiter, WriteController) for time-related functions have been changed to use SystemClock instead.  There are likely more places that can be changed, but this is a start to show what can/should be done.  Over time it would be nice to migrate most (if not all) of the uses of the time functions from the Env to the SystemClock.

There are several Env classes that implement these functions.  Most of these have not been converted yet to SystemClock implementations; that will come in a subsequent PR.  It would be good to unify many of the Mock Timer implementations, so that they behave similarly and be tested similarly (some override Sleep, some use a MockSleep, etc).

Additionally, this change will allow new methods to be introduced to the SystemClock (like https://github.com/facebook/rocksdb/issues/7101 WaitFor) in a consistent manner across a smaller number of classes.

Pull Request resolved: https://github.com/facebook/rocksdb/pull/7858

Reviewed By: pdillinger

Differential Revision: D26006406

Pulled By: mrambacher

fbshipit-source-id: ed10a8abbdab7ff2e23d69d85bd25b3e7e899e90
2021-01-25 22:09:11 -08:00

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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 <limits>
#include <sstream>
#include <string>
#include <utility>
#include <vector>
#include "db/column_family.h"
#include "db/db_impl/db_impl.h"
#include "rocksdb/table.h"
#include "util/string_util.h"
namespace ROCKSDB_NAMESPACE {
#ifndef ROCKSDB_LITE
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"}},
};
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\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));
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) {
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_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);
}
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\n", /* KeyDrop */
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());
}
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 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 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";
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::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::unordered_map<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}},
{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, nullptr, 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::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,
{false, nullptr, nullptr, nullptr,
&DBImpl::GetPropertyHandleOptionsStatistics}},
};
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,
Slice suffix) {
uint64_t level;
const auto* vstorage = cfd_->current()->storage_info();
bool ok = ConsumeDecimalNumber(&suffix, &level) && suffix.empty();
if (!ok || level >= static_cast<uint64_t>(number_levels_)) {
return false;
}
*value = ToString(
vstorage->GetEstimatedCompressionRatioAtLevel(static_cast<int>(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<std::string, std::string>* cf_stats, Slice /*suffix*/) {
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<const TableProperties> tp;
auto s = cfd_->current()->GetAggregatedTableProperties(&tp);
if (!s.ok()) {
return false;
}
*value = tp->ToString();
return true;
}
static std::map<std::string, std::string> MapUint64ValuesToString(
const std::map<std::string, uint64_t>& from) {
std::map<std::string, std::string> to;
for (const auto& e : from) {
to[e.first] = ToString(e.second);
}
return to;
}
bool InternalStats::HandleAggregatedTablePropertiesMap(
std::map<std::string, std::string>* values, Slice /*suffix*/) {
std::shared_ptr<const TableProperties> tp;
auto s = cfd_->current()->GetAggregatedTableProperties(&tp);
if (!s.ok()) {
return false;
}
*values = MapUint64ValuesToString(tp->GetAggregatablePropertiesAsMap());
return true;
}
bool InternalStats::HandleAggregatedTablePropertiesAtLevel(std::string* values,
Slice suffix) {
uint64_t level;
bool ok = ConsumeDecimalNumber(&suffix, &level) && suffix.empty();
if (!ok || static_cast<int>(level) >= number_levels_) {
return false;
}
std::shared_ptr<const TableProperties> tp;
auto s = cfd_->current()->GetAggregatedTableProperties(
&tp, static_cast<int>(level));
if (!s.ok()) {
return false;
}
*values = tp->ToString();
return true;
}
bool InternalStats::HandleAggregatedTablePropertiesAtLevelMap(
std::map<std::string, std::string>* values, Slice suffix) {
uint64_t level;
bool ok = ConsumeDecimalNumber(&suffix, &level) && suffix.empty();
if (!ok || static_cast<int>(level) >= number_levels_) {
return false;
}
std::shared_ptr<const TableProperties> tp;
auto s = cfd_->current()->GetAggregatedTableProperties(
&tp, static_cast<int>(level));
if (!s.ok()) {
return false;
}
*values = MapUint64ValuesToString(tp->GetAggregatablePropertiesAsMap());
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*/) {
*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<uint64_t>(db->snapshots().GetOldestSnapshotTime());
return true;
}
bool InternalStats::HandleOldestSnapshotSequence(uint64_t* value, DBImpl* db,
Version* /*version*/) {
*value = static_cast<uint64_t>(db->snapshots().GetOldestSnapshotSequence());
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() ? 1 : 0;
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::HandleLiveSstFilesSize(uint64_t* value, DBImpl* /*db*/,
Version* /*version*/) {
*value = cfd_->GetLiveSstFilesSize();
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 = version->storage_info();
*value = vstorage->EstimateLiveDataSize();
return true;
}
bool InternalStats::HandleMinLogNumberToKeep(uint64_t* value, DBImpl* db,
Version* /*version*/) {
*value = db->MinLogNumberToKeep();
return true;
}
bool InternalStats::HandleMinObsoleteSstNumberToKeep(uint64_t* value,
DBImpl* db,
Version* /*version*/) {
*value = db->MinObsoleteSstNumberToKeep();
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;
}
bool InternalStats::HandleEstimateOldestKeyTime(uint64_t* value, DBImpl* /*db*/,
Version* /*version*/) {
// TODO(yiwu): The property is currently available for fifo compaction
// with allow_compaction = false. This is because we don't propagate
// oldest_key_time on compaction.
if (cfd_->ioptions()->compaction_style != kCompactionStyleFIFO ||
cfd_->GetCurrentMutableCFOptions()
->compaction_options_fifo.allow_compaction) {
return false;
}
TablePropertiesCollection collection;
auto s = cfd_->current()->GetPropertiesOfAllTables(&collection);
if (!s.ok()) {
return false;
}
*value = std::numeric_limits<uint64_t>::max();
for (auto& p : collection) {
*value = std::min(*value, p.second->oldest_key_time);
if (*value == 0) {
break;
}
}
if (*value > 0) {
*value = std::min({cfd_->mem()->ApproximateOldestKeyTime(),
cfd_->imm()->ApproximateOldestKeyTime(), *value});
}
return *value > 0 && *value < std::numeric_limits<uint64_t>::max();
}
bool InternalStats::HandleBlockCacheStat(Cache** block_cache) {
assert(block_cache != nullptr);
auto* table_factory = cfd_->ioptions()->table_factory;
assert(table_factory != nullptr);
*block_cache =
table_factory->GetOptions<Cache>(TableFactory::kBlockCacheOpts());
return *block_cache != nullptr;
}
bool InternalStats::HandleBlockCacheCapacity(uint64_t* value, DBImpl* /*db*/,
Version* /*version*/) {
Cache* block_cache;
bool ok = HandleBlockCacheStat(&block_cache);
if (!ok) {
return false;
}
*value = static_cast<uint64_t>(block_cache->GetCapacity());
return true;
}
bool InternalStats::HandleBlockCacheUsage(uint64_t* value, DBImpl* /*db*/,
Version* /*version*/) {
Cache* block_cache;
bool ok = HandleBlockCacheStat(&block_cache);
if (!ok) {
return false;
}
*value = static_cast<uint64_t>(block_cache->GetUsage());
return true;
}
bool InternalStats::HandleBlockCachePinnedUsage(uint64_t* value, DBImpl* /*db*/,
Version* /*version*/) {
Cache* block_cache;
bool ok = HandleBlockCacheStat(&block_cache);
if (!ok) {
return false;
}
*value = static_cast<uint64_t>(block_cache->GetPinnedUsage());
return true;
}
void InternalStats::DumpDBStats(std::string* value) {
char buf[1000];
// DB-level stats, only available from default column family
double seconds_up = (clock_->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::kIntStatsBytesWritten);
uint64_t num_keys_written =
GetDBStats(InternalStats::kIntStatsNumKeysWritten);
uint64_t write_other = GetDBStats(InternalStats::kIntStatsWriteDoneByOther);
uint64_t write_self = GetDBStats(InternalStats::kIntStatsWriteDoneBySelf);
uint64_t wal_bytes = GetDBStats(InternalStats::kIntStatsWalFileBytes);
uint64_t wal_synced = GetDBStats(InternalStats::kIntStatsWalFileSynced);
uint64_t write_with_wal = GetDBStats(InternalStats::kIntStatsWriteWithWal);
uint64_t write_stall_micros =
GetDBStats(InternalStats::kIntStatsWriteStallMicros);
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<double>(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<double>(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<double>(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<double>(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<std::string, std::string>* cf_stats) {
CompactionStats compaction_stats_sum;
std::map<int, std::map<LevelStatType, double>> 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<int, std::map<LevelStatType, double>>* 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<double> 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<int> 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<double>(comp_stats_[level].bytes_written) /
input_bytes;
std::map<LevelStatType, double> level_stats;
PrepareLevelStats(&level_stats, files, files_being_compacted[level],
static_cast<double>(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<double>(curr_ingest + 1);
// Stats summary across levels
std::map<LevelStatType, double> 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::DumpCFMapStatsByPriority(
std::map<int, std::map<LevelStatType, double>>* priorities_stats) {
for (size_t priority = 0; priority < comp_stats_by_pri_.size(); priority++) {
if (comp_stats_by_pri_[priority].micros > 0) {
std::map<LevelStatType, double> priority_stats;
PrepareLevelStats(&priority_stats, 0 /* num_files */,
0 /* being_compacted */, 0 /* total_file_size */,
0 /* compaction_score */, 0 /* w_amp */,
comp_stats_by_pri_[priority]);
(*priorities_stats)[static_cast<int>(priority)] = priority_stats;
}
}
}
void InternalStats::DumpCFMapStatsIOStalls(
std::map<std::string, std::string>* cf_stats) {
(*cf_stats)["io_stalls.level0_slowdown"] =
std::to_string(cf_stats_count_[L0_FILE_COUNT_LIMIT_SLOWDOWNS]);
(*cf_stats)["io_stalls.level0_slowdown_with_compaction"] =
std::to_string(cf_stats_count_[LOCKED_L0_FILE_COUNT_LIMIT_SLOWDOWNS]);
(*cf_stats)["io_stalls.level0_numfiles"] =
std::to_string(cf_stats_count_[L0_FILE_COUNT_LIMIT_STOPS]);
(*cf_stats)["io_stalls.level0_numfiles_with_compaction"] =
std::to_string(cf_stats_count_[LOCKED_L0_FILE_COUNT_LIMIT_STOPS]);
(*cf_stats)["io_stalls.stop_for_pending_compaction_bytes"] =
std::to_string(cf_stats_count_[PENDING_COMPACTION_BYTES_LIMIT_STOPS]);
(*cf_stats)["io_stalls.slowdown_for_pending_compaction_bytes"] =
std::to_string(cf_stats_count_[PENDING_COMPACTION_BYTES_LIMIT_SLOWDOWNS]);
(*cf_stats)["io_stalls.memtable_compaction"] =
std::to_string(cf_stats_count_[MEMTABLE_LIMIT_STOPS]);
(*cf_stats)["io_stalls.memtable_slowdown"] =
std::to_string(cf_stats_count_[MEMTABLE_LIMIT_SLOWDOWNS]);
uint64_t total_stop = cf_stats_count_[L0_FILE_COUNT_LIMIT_STOPS] +
cf_stats_count_[PENDING_COMPACTION_BYTES_LIMIT_STOPS] +
cf_stats_count_[MEMTABLE_LIMIT_STOPS];
uint64_t total_slowdown =
cf_stats_count_[L0_FILE_COUNT_LIMIT_SLOWDOWNS] +
cf_stats_count_[PENDING_COMPACTION_BYTES_LIMIT_SLOWDOWNS] +
cf_stats_count_[MEMTABLE_LIMIT_SLOWDOWNS];
(*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(), "Level");
value->append(buf);
// Print stats for each level
std::map<int, std::map<LevelStatType, double>> levels_stats;
CompactionStats compaction_stats_sum;
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_[L0_FILE_COUNT_LIMIT_SLOWDOWNS] +
cf_stats_count_[L0_FILE_COUNT_LIMIT_STOPS] +
cf_stats_count_[PENDING_COMPACTION_BYTES_LIMIT_SLOWDOWNS] +
cf_stats_count_[PENDING_COMPACTION_BYTES_LIMIT_STOPS] +
cf_stats_count_[MEMTABLE_LIMIT_STOPS] +
cf_stats_count_[MEMTABLE_LIMIT_SLOWDOWNS];
// 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<double>(interval_ingest);
PrintLevelStats(buf, sizeof(buf), "Int", 0, 0, 0, 0, w_amp, interval_stats);
value->append(buf);
PrintLevelStatsHeader(buf, sizeof(buf), cfd_->GetName(), "Priority");
value->append(buf);
std::map<int, std::map<LevelStatType, double>> priorities_stats;
DumpCFMapStatsByPriority(&priorities_stats);
for (size_t priority = 0; priority < comp_stats_by_pri_.size(); ++priority) {
if (priorities_stats.find(static_cast<int>(priority)) !=
priorities_stats.end()) {
PrintLevelStats(
buf, sizeof(buf),
Env::PriorityToString(static_cast<Env::Priority>(priority)),
priorities_stats[static_cast<int>(priority)]);
value->append(buf);
}
}
double seconds_up = (clock_->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_[L0_FILE_COUNT_LIMIT_SLOWDOWNS],
cf_stats_count_[LOCKED_L0_FILE_COUNT_LIMIT_SLOWDOWNS],
cf_stats_count_[L0_FILE_COUNT_LIMIT_STOPS],
cf_stats_count_[LOCKED_L0_FILE_COUNT_LIMIT_STOPS],
cf_stats_count_[PENDING_COMPACTION_BYTES_LIMIT_STOPS],
cf_stats_count_[PENDING_COMPACTION_BYTES_LIMIT_SLOWDOWNS],
cf_stats_count_[MEMTABLE_LIMIT_STOPS],
cf_stats_count_[MEMTABLE_LIMIT_SLOWDOWNS],
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) {
assert(value);
assert(cfd_);
std::ostringstream oss;
oss << "\n** File Read Latency Histogram By Level [" << cfd_->GetName()
<< "] **\n";
for (int level = 0; level < number_levels_; level++) {
if (!file_read_latency_[level].Empty()) {
oss << "** Level " << level << " read latency histogram (micros):\n"
<< file_read_latency_[level].ToString() << '\n';
}
}
if (!blob_file_read_latency_.Empty()) {
oss << "** Blob file read latency histogram (micros):\n"
<< blob_file_read_latency_.ToString() << '\n';
}
value->append(oss.str());
}
#else
const DBPropertyInfo* GetPropertyInfo(const Slice& /*property*/) {
return nullptr;
}
#endif // !ROCKSDB_LITE
} // namespace ROCKSDB_NAMESPACE
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