8a1c34903c
Summary: Add a function to allow users to reset internal stats without restarting the DB. Closes https://github.com/facebook/rocksdb/pull/2167 Differential Revision: D4907939 Pulled By: siying fbshipit-source-id: ab2dd85b88aabe9380da7485320a1d460d3e1f68
582 lines
20 KiB
C++
582 lines
20 KiB
C++
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
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// This source code is licensed under the BSD-style license found in the
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// LICENSE file in the root directory of this source tree. An additional grant
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// of patent rights can be found in the PATENTS file in the same directory.
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//
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// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file. See the AUTHORS file for names of contributors.
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//
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#pragma once
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#include <map>
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#include <string>
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#include <vector>
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#include "db/version_set.h"
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class ColumnFamilyData;
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namespace rocksdb {
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class MemTableList;
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class DBImpl;
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// Config for retrieving a property's value.
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struct DBPropertyInfo {
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bool need_out_of_mutex;
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// gcc had an internal error for initializing union of pointer-to-member-
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// functions. Workaround is to populate exactly one of the following function
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// pointers with a non-nullptr value.
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// @param value Value-result argument for storing the property's string value
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// @param suffix Argument portion of the property. For example, suffix would
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// be "5" for the property "rocksdb.num-files-at-level5". So far, only
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// certain string properties take an argument.
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bool (InternalStats::*handle_string)(std::string* value, Slice suffix);
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// @param value Value-result argument for storing the property's uint64 value
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// @param db Many of the int properties rely on DBImpl methods.
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// @param version Version is needed in case the property is retrieved without
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// holding db mutex, which is only supported for int properties.
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bool (InternalStats::*handle_int)(uint64_t* value, DBImpl* db,
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Version* version);
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bool (InternalStats::*handle_map)(
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std::map<std::string, double>* compaction_stats);
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};
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extern const DBPropertyInfo* GetPropertyInfo(const Slice& property);
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#ifndef ROCKSDB_LITE
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enum class LevelStatType {
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INVALID = 0,
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NUM_FILES,
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COMPACTED_FILES,
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SIZE_BYTES,
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SCORE,
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READ_GB,
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RN_GB,
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RNP1_GB,
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WRITE_GB,
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W_NEW_GB,
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MOVED_GB,
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WRITE_AMP,
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READ_MBPS,
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WRITE_MBPS,
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COMP_SEC,
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COMP_COUNT,
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AVG_SEC,
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KEY_IN,
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KEY_DROP,
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TOTAL // total number of types
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};
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struct LevelStat {
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// This what will be L?.property_name in the flat map returned to the user
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std::string property_name;
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// This will be what we will print in the header in the cli
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std::string header_name;
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};
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class InternalStats {
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public:
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static const std::map<LevelStatType, LevelStat> compaction_level_stats;
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enum InternalCFStatsType {
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LEVEL0_SLOWDOWN_TOTAL,
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LEVEL0_SLOWDOWN_WITH_COMPACTION,
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MEMTABLE_COMPACTION,
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MEMTABLE_SLOWDOWN,
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LEVEL0_NUM_FILES_TOTAL,
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LEVEL0_NUM_FILES_WITH_COMPACTION,
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SOFT_PENDING_COMPACTION_BYTES_LIMIT,
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HARD_PENDING_COMPACTION_BYTES_LIMIT,
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WRITE_STALLS_ENUM_MAX,
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BYTES_FLUSHED,
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BYTES_INGESTED_ADD_FILE,
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INGESTED_NUM_FILES_TOTAL,
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INGESTED_LEVEL0_NUM_FILES_TOTAL,
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INGESTED_NUM_KEYS_TOTAL,
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INTERNAL_CF_STATS_ENUM_MAX,
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};
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enum InternalDBStatsType {
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WAL_FILE_BYTES,
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WAL_FILE_SYNCED,
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BYTES_WRITTEN,
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NUMBER_KEYS_WRITTEN,
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WRITE_DONE_BY_OTHER,
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WRITE_DONE_BY_SELF,
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WRITE_WITH_WAL,
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WRITE_STALL_MICROS,
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INTERNAL_DB_STATS_ENUM_MAX,
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};
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InternalStats(int num_levels, Env* env, ColumnFamilyData* cfd)
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: db_stats_{},
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cf_stats_value_{},
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cf_stats_count_{},
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comp_stats_(num_levels),
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file_read_latency_(num_levels),
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bg_error_count_(0),
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number_levels_(num_levels),
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env_(env),
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cfd_(cfd),
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started_at_(env->NowMicros()) {}
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// Per level compaction stats. comp_stats_[level] stores the stats for
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// compactions that produced data for the specified "level".
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struct CompactionStats {
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uint64_t micros;
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// The number of bytes read from all non-output levels
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uint64_t bytes_read_non_output_levels;
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// The number of bytes read from the compaction output level.
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uint64_t bytes_read_output_level;
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// Total number of bytes written during compaction
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uint64_t bytes_written;
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// Total number of bytes moved to the output level
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uint64_t bytes_moved;
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// The number of compaction input files in all non-output levels.
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int num_input_files_in_non_output_levels;
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// The number of compaction input files in the output level.
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int num_input_files_in_output_level;
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// The number of compaction output files.
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int num_output_files;
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// Total incoming entries during compaction between levels N and N+1
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uint64_t num_input_records;
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// Accumulated diff number of entries
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// (num input entries - num output entires) for compaction levels N and N+1
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uint64_t num_dropped_records;
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// Number of compactions done
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int count;
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explicit CompactionStats(int _count = 0)
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: micros(0),
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bytes_read_non_output_levels(0),
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bytes_read_output_level(0),
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bytes_written(0),
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bytes_moved(0),
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num_input_files_in_non_output_levels(0),
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num_input_files_in_output_level(0),
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num_output_files(0),
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num_input_records(0),
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num_dropped_records(0),
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count(_count) {}
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explicit CompactionStats(const CompactionStats& c)
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: micros(c.micros),
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bytes_read_non_output_levels(c.bytes_read_non_output_levels),
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bytes_read_output_level(c.bytes_read_output_level),
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bytes_written(c.bytes_written),
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bytes_moved(c.bytes_moved),
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num_input_files_in_non_output_levels(
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c.num_input_files_in_non_output_levels),
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num_input_files_in_output_level(
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c.num_input_files_in_output_level),
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num_output_files(c.num_output_files),
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num_input_records(c.num_input_records),
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num_dropped_records(c.num_dropped_records),
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count(c.count) {}
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void Clear() {
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this->micros = 0;
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this->bytes_read_non_output_levels = 0;
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this->bytes_read_output_level = 0;
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this->bytes_written = 0;
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this->bytes_moved = 0;
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this->num_input_files_in_non_output_levels = 0;
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this->num_input_files_in_output_level = 0;
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this->num_output_files = 0;
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this->num_input_records = 0;
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this->num_dropped_records = 0;
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this->count = 0;
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}
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void Add(const CompactionStats& c) {
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this->micros += c.micros;
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this->bytes_read_non_output_levels += c.bytes_read_non_output_levels;
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this->bytes_read_output_level += c.bytes_read_output_level;
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this->bytes_written += c.bytes_written;
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this->bytes_moved += c.bytes_moved;
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this->num_input_files_in_non_output_levels +=
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c.num_input_files_in_non_output_levels;
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this->num_input_files_in_output_level +=
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c.num_input_files_in_output_level;
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this->num_output_files += c.num_output_files;
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this->num_input_records += c.num_input_records;
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this->num_dropped_records += c.num_dropped_records;
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this->count += c.count;
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}
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void Subtract(const CompactionStats& c) {
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this->micros -= c.micros;
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this->bytes_read_non_output_levels -= c.bytes_read_non_output_levels;
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this->bytes_read_output_level -= c.bytes_read_output_level;
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this->bytes_written -= c.bytes_written;
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this->bytes_moved -= c.bytes_moved;
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this->num_input_files_in_non_output_levels -=
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c.num_input_files_in_non_output_levels;
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this->num_input_files_in_output_level -=
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c.num_input_files_in_output_level;
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this->num_output_files -= c.num_output_files;
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this->num_input_records -= c.num_input_records;
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this->num_dropped_records -= c.num_dropped_records;
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this->count -= c.count;
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}
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};
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void Clear() {
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for (int i = 0; i < INTERNAL_DB_STATS_ENUM_MAX; i++) {
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db_stats_[i].store(0);
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}
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for (int i = 0; i < INTERNAL_CF_STATS_ENUM_MAX; i++) {
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cf_stats_count_[i] = 0;
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cf_stats_value_[i] = 0;
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}
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for (auto& comp_stat : comp_stats_) {
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comp_stat.Clear();
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}
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for (auto& h : file_read_latency_) {
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h.Clear();
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}
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cf_stats_snapshot_.Clear();
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db_stats_snapshot_.Clear();
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bg_error_count_ = 0;
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started_at_ = env_->NowMicros();
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}
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void AddCompactionStats(int level, const CompactionStats& stats) {
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comp_stats_[level].Add(stats);
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}
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void IncBytesMoved(int level, uint64_t amount) {
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comp_stats_[level].bytes_moved += amount;
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}
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void AddCFStats(InternalCFStatsType type, uint64_t value) {
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cf_stats_value_[type] += value;
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++cf_stats_count_[type];
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}
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void AddDBStats(InternalDBStatsType type, uint64_t value) {
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auto& v = db_stats_[type];
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v.store(v.load(std::memory_order_relaxed) + value,
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std::memory_order_relaxed);
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}
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uint64_t GetDBStats(InternalDBStatsType type) {
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return db_stats_[type].load(std::memory_order_relaxed);
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}
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HistogramImpl* GetFileReadHist(int level) {
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return &file_read_latency_[level];
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}
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uint64_t GetBackgroundErrorCount() const { return bg_error_count_; }
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uint64_t BumpAndGetBackgroundErrorCount() { return ++bg_error_count_; }
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bool GetStringProperty(const DBPropertyInfo& property_info,
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const Slice& property, std::string* value);
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bool GetMapProperty(const DBPropertyInfo& property_info,
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const Slice& property,
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std::map<std::string, double>* value);
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bool GetIntProperty(const DBPropertyInfo& property_info, uint64_t* value,
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DBImpl* db);
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bool GetIntPropertyOutOfMutex(const DBPropertyInfo& property_info,
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Version* version, uint64_t* value);
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// Store a mapping from the user-facing DB::Properties string to our
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// DBPropertyInfo struct used internally for retrieving properties.
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static const std::unordered_map<std::string, DBPropertyInfo> ppt_name_to_info;
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private:
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void DumpDBStats(std::string* value);
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void DumpCFMapStats(std::map<std::string, double>* cf_stats);
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void DumpCFMapStats(
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std::map<int, std::map<LevelStatType, double>>* level_stats,
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CompactionStats* compaction_stats_sum);
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void DumpCFStats(std::string* value);
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void DumpCFStatsNoFileHistogram(std::string* value);
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void DumpCFFileHistogram(std::string* value);
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// Per-DB stats
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std::atomic<uint64_t> db_stats_[INTERNAL_DB_STATS_ENUM_MAX];
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// Per-ColumnFamily stats
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uint64_t cf_stats_value_[INTERNAL_CF_STATS_ENUM_MAX];
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uint64_t cf_stats_count_[INTERNAL_CF_STATS_ENUM_MAX];
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// Per-ColumnFamily/level compaction stats
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std::vector<CompactionStats> comp_stats_;
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std::vector<HistogramImpl> file_read_latency_;
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// Used to compute per-interval statistics
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struct CFStatsSnapshot {
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// ColumnFamily-level stats
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CompactionStats comp_stats;
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uint64_t ingest_bytes_flush; // Bytes written to L0 (Flush)
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uint64_t stall_count; // Stall count
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// Stats from compaction jobs - bytes written, bytes read, duration.
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uint64_t compact_bytes_write;
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uint64_t compact_bytes_read;
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uint64_t compact_micros;
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double seconds_up;
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// AddFile specific stats
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uint64_t ingest_bytes_addfile; // Total Bytes ingested
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uint64_t ingest_files_addfile; // Total number of files ingested
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uint64_t ingest_l0_files_addfile; // Total number of files ingested to L0
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uint64_t ingest_keys_addfile; // Total number of keys ingested
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CFStatsSnapshot()
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: comp_stats(0),
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ingest_bytes_flush(0),
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stall_count(0),
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compact_bytes_write(0),
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compact_bytes_read(0),
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compact_micros(0),
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seconds_up(0),
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ingest_bytes_addfile(0),
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ingest_files_addfile(0),
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ingest_l0_files_addfile(0),
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ingest_keys_addfile(0) {}
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void Clear() {
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comp_stats.Clear();
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ingest_bytes_flush = 0;
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stall_count = 0;
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compact_bytes_write = 0;
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compact_bytes_read = 0;
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compact_micros = 0;
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seconds_up = 0;
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ingest_bytes_addfile = 0;
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ingest_files_addfile = 0;
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ingest_l0_files_addfile = 0;
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ingest_keys_addfile = 0;
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}
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} cf_stats_snapshot_;
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struct DBStatsSnapshot {
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// DB-level stats
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uint64_t ingest_bytes; // Bytes written by user
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uint64_t wal_bytes; // Bytes written to WAL
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uint64_t wal_synced; // Number of times WAL is synced
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uint64_t write_with_wal; // Number of writes that request WAL
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// These count the number of writes processed by the calling thread or
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// another thread.
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uint64_t write_other;
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uint64_t write_self;
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// Total number of keys written. write_self and write_other measure number
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// of write requests written, Each of the write request can contain updates
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// to multiple keys. num_keys_written is total number of keys updated by all
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// those writes.
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uint64_t num_keys_written;
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// Total time writes delayed by stalls.
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uint64_t write_stall_micros;
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double seconds_up;
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DBStatsSnapshot()
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: ingest_bytes(0),
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wal_bytes(0),
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wal_synced(0),
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write_with_wal(0),
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write_other(0),
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write_self(0),
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num_keys_written(0),
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write_stall_micros(0),
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seconds_up(0) {}
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void Clear() {
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ingest_bytes = 0;
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wal_bytes = 0;
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wal_synced = 0;
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write_with_wal = 0;
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write_other = 0;
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write_self = 0;
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num_keys_written = 0;
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write_stall_micros = 0;
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seconds_up = 0;
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}
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} db_stats_snapshot_;
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// Handler functions for getting property values. They use "value" as a value-
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// result argument, and return true upon successfully setting "value".
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bool HandleNumFilesAtLevel(std::string* value, Slice suffix);
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bool HandleCompressionRatioAtLevelPrefix(std::string* value, Slice suffix);
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bool HandleLevelStats(std::string* value, Slice suffix);
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bool HandleStats(std::string* value, Slice suffix);
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bool HandleCFMapStats(std::map<std::string, double>* compaction_stats);
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bool HandleCFStats(std::string* value, Slice suffix);
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bool HandleCFStatsNoFileHistogram(std::string* value, Slice suffix);
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bool HandleCFFileHistogram(std::string* value, Slice suffix);
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bool HandleDBStats(std::string* value, Slice suffix);
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bool HandleSsTables(std::string* value, Slice suffix);
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bool HandleAggregatedTableProperties(std::string* value, Slice suffix);
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bool HandleAggregatedTablePropertiesAtLevel(std::string* value, Slice suffix);
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bool HandleNumImmutableMemTable(uint64_t* value, DBImpl* db,
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Version* version);
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bool HandleNumImmutableMemTableFlushed(uint64_t* value, DBImpl* db,
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Version* version);
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bool HandleMemTableFlushPending(uint64_t* value, DBImpl* db,
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Version* version);
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bool HandleNumRunningFlushes(uint64_t* value, DBImpl* db, Version* version);
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bool HandleCompactionPending(uint64_t* value, DBImpl* db, Version* version);
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bool HandleNumRunningCompactions(uint64_t* value, DBImpl* db,
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Version* version);
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bool HandleBackgroundErrors(uint64_t* value, DBImpl* db, Version* version);
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bool HandleCurSizeActiveMemTable(uint64_t* value, DBImpl* db,
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Version* version);
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bool HandleCurSizeAllMemTables(uint64_t* value, DBImpl* db, Version* version);
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bool HandleSizeAllMemTables(uint64_t* value, DBImpl* db, Version* version);
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bool HandleNumEntriesActiveMemTable(uint64_t* value, DBImpl* db,
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Version* version);
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bool HandleNumEntriesImmMemTables(uint64_t* value, DBImpl* db,
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Version* version);
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bool HandleNumDeletesActiveMemTable(uint64_t* value, DBImpl* db,
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Version* version);
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bool HandleNumDeletesImmMemTables(uint64_t* value, DBImpl* db,
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Version* version);
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bool HandleEstimateNumKeys(uint64_t* value, DBImpl* db, Version* version);
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bool HandleNumSnapshots(uint64_t* value, DBImpl* db, Version* version);
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bool HandleOldestSnapshotTime(uint64_t* value, DBImpl* db, Version* version);
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bool HandleNumLiveVersions(uint64_t* value, DBImpl* db, Version* version);
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bool HandleCurrentSuperVersionNumber(uint64_t* value, DBImpl* db,
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Version* version);
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bool HandleIsFileDeletionsEnabled(uint64_t* value, DBImpl* db,
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Version* version);
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bool HandleBaseLevel(uint64_t* value, DBImpl* db, Version* version);
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bool HandleTotalSstFilesSize(uint64_t* value, DBImpl* db, Version* version);
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bool HandleEstimatePendingCompactionBytes(uint64_t* value, DBImpl* db,
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Version* version);
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bool HandleEstimateTableReadersMem(uint64_t* value, DBImpl* db,
|
|
Version* version);
|
|
bool HandleEstimateLiveDataSize(uint64_t* value, DBImpl* db,
|
|
Version* version);
|
|
bool HandleMinLogNumberToKeep(uint64_t* value, DBImpl* db, Version* version);
|
|
bool HandleActualDelayedWriteRate(uint64_t* value, DBImpl* db,
|
|
Version* version);
|
|
bool HandleIsWriteStopped(uint64_t* value, DBImpl* db, Version* version);
|
|
|
|
// Total number of background errors encountered. Every time a flush task
|
|
// or compaction task fails, this counter is incremented. The failure can
|
|
// be caused by any possible reason, including file system errors, out of
|
|
// resources, or input file corruption. Failing when retrying the same flush
|
|
// or compaction will cause the counter to increase too.
|
|
uint64_t bg_error_count_;
|
|
|
|
const int number_levels_;
|
|
Env* env_;
|
|
ColumnFamilyData* cfd_;
|
|
uint64_t started_at_;
|
|
};
|
|
|
|
#else
|
|
|
|
class InternalStats {
|
|
public:
|
|
enum InternalCFStatsType {
|
|
LEVEL0_SLOWDOWN_TOTAL,
|
|
LEVEL0_SLOWDOWN_WITH_COMPACTION,
|
|
MEMTABLE_COMPACTION,
|
|
MEMTABLE_SLOWDOWN,
|
|
LEVEL0_NUM_FILES_TOTAL,
|
|
LEVEL0_NUM_FILES_WITH_COMPACTION,
|
|
SOFT_PENDING_COMPACTION_BYTES_LIMIT,
|
|
HARD_PENDING_COMPACTION_BYTES_LIMIT,
|
|
WRITE_STALLS_ENUM_MAX,
|
|
BYTES_FLUSHED,
|
|
BYTES_INGESTED_ADD_FILE,
|
|
INGESTED_NUM_FILES_TOTAL,
|
|
INGESTED_LEVEL0_NUM_FILES_TOTAL,
|
|
INGESTED_NUM_KEYS_TOTAL,
|
|
INTERNAL_CF_STATS_ENUM_MAX,
|
|
};
|
|
|
|
enum InternalDBStatsType {
|
|
WAL_FILE_BYTES,
|
|
WAL_FILE_SYNCED,
|
|
BYTES_WRITTEN,
|
|
NUMBER_KEYS_WRITTEN,
|
|
WRITE_DONE_BY_OTHER,
|
|
WRITE_DONE_BY_SELF,
|
|
WRITE_WITH_WAL,
|
|
WRITE_STALL_MICROS,
|
|
INTERNAL_DB_STATS_ENUM_MAX,
|
|
};
|
|
|
|
InternalStats(int num_levels, Env* env, ColumnFamilyData* cfd) {}
|
|
|
|
struct CompactionStats {
|
|
uint64_t micros;
|
|
uint64_t bytes_read_non_output_levels;
|
|
uint64_t bytes_read_output_level;
|
|
uint64_t bytes_written;
|
|
uint64_t bytes_moved;
|
|
int num_input_files_in_non_output_levels;
|
|
int num_input_files_in_output_level;
|
|
int num_output_files;
|
|
uint64_t num_input_records;
|
|
uint64_t num_dropped_records;
|
|
int count;
|
|
|
|
explicit CompactionStats(int _count = 0) {}
|
|
|
|
explicit CompactionStats(const CompactionStats& c) {}
|
|
|
|
void Add(const CompactionStats& c) {}
|
|
|
|
void Subtract(const CompactionStats& c) {}
|
|
};
|
|
|
|
void AddCompactionStats(int level, const CompactionStats& stats) {}
|
|
|
|
void IncBytesMoved(int level, uint64_t amount) {}
|
|
|
|
void AddCFStats(InternalCFStatsType type, uint64_t value) {}
|
|
|
|
void AddDBStats(InternalDBStatsType type, uint64_t value) {}
|
|
|
|
HistogramImpl* GetFileReadHist(int level) { return nullptr; }
|
|
|
|
uint64_t GetBackgroundErrorCount() const { return 0; }
|
|
|
|
uint64_t BumpAndGetBackgroundErrorCount() { return 0; }
|
|
|
|
bool GetStringProperty(const DBPropertyInfo& property_info,
|
|
const Slice& property, std::string* value) {
|
|
return false;
|
|
}
|
|
|
|
bool GetMapProperty(const DBPropertyInfo& property_info,
|
|
const Slice& property,
|
|
std::map<std::string, double>* value) {
|
|
return false;
|
|
}
|
|
|
|
bool GetIntProperty(const DBPropertyInfo& property_info, uint64_t* value,
|
|
DBImpl* db) const {
|
|
return false;
|
|
}
|
|
|
|
bool GetIntPropertyOutOfMutex(const DBPropertyInfo& property_info,
|
|
Version* version, uint64_t* value) const {
|
|
return false;
|
|
}
|
|
};
|
|
#endif // !ROCKSDB_LITE
|
|
|
|
} // namespace rocksdb
|