66a2c44ef4
Summary: With FIFO compaction we would like to get the oldest data time for monitoring. The problem is we don't have timestamp for each key in the DB. As an approximation, we expose the earliest of sst file "creation_time" property. My plan is to override the property with a more accurate value with blob db, where we actually have timestamp. Closes https://github.com/facebook/rocksdb/pull/2842 Differential Revision: D5770600 Pulled By: yiwu-arbug fbshipit-source-id: 03833c8f10bbfbee62f8ea5c0d03c0cafb5d853a
593 lines
20 KiB
C++
593 lines
20 KiB
C++
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
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// This source code is licensed under both the GPLv2 (found in the
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// COPYING file in the root directory) and Apache 2.0 License
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// (found in the LICENSE.Apache file in the root 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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// @param props Map of general properties to populate
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bool (InternalStats::*handle_map)(std::map<std::string, std::string>* props);
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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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#undef SCORE
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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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L0_FILE_COUNT_LIMIT_SLOWDOWNS,
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LOCKED_L0_FILE_COUNT_LIMIT_SLOWDOWNS,
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MEMTABLE_LIMIT_STOPS,
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MEMTABLE_LIMIT_SLOWDOWNS,
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L0_FILE_COUNT_LIMIT_STOPS,
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LOCKED_L0_FILE_COUNT_LIMIT_STOPS,
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PENDING_COMPACTION_BYTES_LIMIT_SLOWDOWNS,
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PENDING_COMPACTION_BYTES_LIMIT_STOPS,
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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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bool concurrent = false) {
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auto& v = db_stats_[type];
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if (concurrent) {
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v.fetch_add(value, std::memory_order_relaxed);
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} else {
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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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}
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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, std::string>* 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, std::string>* 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 DumpCFMapStatsIOStalls(std::map<std::string, std::string>* cf_stats);
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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, std::string>* 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);
|
|
bool HandleNumLiveVersions(uint64_t* value, DBImpl* db, Version* version);
|
|
bool HandleCurrentSuperVersionNumber(uint64_t* value, DBImpl* db,
|
|
Version* version);
|
|
bool HandleIsFileDeletionsEnabled(uint64_t* value, DBImpl* db,
|
|
Version* version);
|
|
bool HandleBaseLevel(uint64_t* value, DBImpl* db, Version* version);
|
|
bool HandleTotalSstFilesSize(uint64_t* value, DBImpl* db, Version* version);
|
|
bool HandleEstimatePendingCompactionBytes(uint64_t* value, DBImpl* db,
|
|
Version* version);
|
|
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);
|
|
bool HandleEstimateOldestKeyTime(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 {
|
|
L0_FILE_COUNT_LIMIT_SLOWDOWNS,
|
|
LOCKED_L0_FILE_COUNT_LIMIT_SLOWDOWNS,
|
|
MEMTABLE_LIMIT_STOPS,
|
|
MEMTABLE_LIMIT_SLOWDOWNS,
|
|
L0_FILE_COUNT_LIMIT_STOPS,
|
|
LOCKED_L0_FILE_COUNT_LIMIT_STOPS,
|
|
PENDING_COMPACTION_BYTES_LIMIT_SLOWDOWNS,
|
|
PENDING_COMPACTION_BYTES_LIMIT_STOPS,
|
|
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,
|
|
bool concurrent = false) {}
|
|
|
|
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, std::string>* 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
|