a291f3a1e5
Summary: In order to better understand compaction done by different priority thread pool, we now collect compaction stats by priority and also print them to info LOG through stats dump. ``` ** Compaction Stats [default] ** Priority Files Size Score Read(GB) Rn(GB) Rnp1(GB) Write(GB) Wnew(GB) Moved(GB) W-Amp Rd(MB/s) Wr(MB/s) Comp(sec) CompMergeCPU(sec) Comp(cnt) Avg(sec) KeyIn KeyDrop ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Low 0/0 0.00 KB 0.0 16.8 11.3 5.5 5.6 0.1 0.0 0.0 406.4 136.1 42.24 34.96 45 0.939 13M 8865K High 0/0 0.00 KB 0.0 0.0 0.0 0.0 11.4 11.4 0.0 0.0 0.0 76.2 153.00 35.74 12185 0.013 0 0 ``` Pull Request resolved: https://github.com/facebook/rocksdb/pull/5050 Differential Revision: D14408583 Pulled By: miasantreble fbshipit-source-id: e53746586ea27cb8abc9fec35805bd80ed30f608
145 lines
5.3 KiB
C++
145 lines
5.3 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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#pragma once
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#include <atomic>
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#include <deque>
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#include <limits>
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#include <set>
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#include <utility>
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#include <vector>
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#include <string>
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#include "db/column_family.h"
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#include "db/dbformat.h"
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#include "db/flush_scheduler.h"
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#include "db/internal_stats.h"
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#include "db/job_context.h"
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#include "db/log_writer.h"
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#include "db/logs_with_prep_tracker.h"
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#include "db/memtable_list.h"
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#include "db/snapshot_impl.h"
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#include "db/version_edit.h"
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#include "db/write_controller.h"
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#include "db/write_thread.h"
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#include "monitoring/instrumented_mutex.h"
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#include "options/db_options.h"
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#include "port/port.h"
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#include "rocksdb/db.h"
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#include "rocksdb/env.h"
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#include "rocksdb/memtablerep.h"
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#include "rocksdb/transaction_log.h"
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#include "table/scoped_arena_iterator.h"
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#include "util/autovector.h"
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#include "util/event_logger.h"
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#include "util/stop_watch.h"
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#include "util/thread_local.h"
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namespace rocksdb {
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class DBImpl;
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class MemTable;
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class SnapshotChecker;
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class TableCache;
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class Version;
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class VersionEdit;
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class VersionSet;
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class Arena;
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class FlushJob {
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public:
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// TODO(icanadi) make effort to reduce number of parameters here
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// IMPORTANT: mutable_cf_options needs to be alive while FlushJob is alive
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FlushJob(const std::string& dbname, ColumnFamilyData* cfd,
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const ImmutableDBOptions& db_options,
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const MutableCFOptions& mutable_cf_options,
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const uint64_t* max_memtable_id, const EnvOptions& env_options,
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VersionSet* versions, InstrumentedMutex* db_mutex,
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std::atomic<bool>* shutting_down,
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std::vector<SequenceNumber> existing_snapshots,
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SequenceNumber earliest_write_conflict_snapshot,
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SnapshotChecker* snapshot_checker, JobContext* job_context,
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LogBuffer* log_buffer, Directory* db_directory,
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Directory* output_file_directory, CompressionType output_compression,
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Statistics* stats, EventLogger* event_logger, bool measure_io_stats,
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const bool sync_output_directory, const bool write_manifest,
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Env::Priority thread_pri);
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~FlushJob();
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// Require db_mutex held.
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// Once PickMemTable() is called, either Run() or Cancel() has to be called.
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void PickMemTable();
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Status Run(LogsWithPrepTracker* prep_tracker = nullptr,
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FileMetaData* file_meta = nullptr);
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void Cancel();
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TableProperties GetTableProperties() const { return table_properties_; }
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const autovector<MemTable*>& GetMemTables() const { return mems_; }
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private:
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void ReportStartedFlush();
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void ReportFlushInputSize(const autovector<MemTable*>& mems);
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void RecordFlushIOStats();
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Status WriteLevel0Table();
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const std::string& dbname_;
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ColumnFamilyData* cfd_;
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const ImmutableDBOptions& db_options_;
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const MutableCFOptions& mutable_cf_options_;
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// Pointer to a variable storing the largest memtable id to flush in this
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// flush job. RocksDB uses this variable to select the memtables to flush in
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// this job. All memtables in this column family with an ID smaller than or
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// equal to *max_memtable_id_ will be selected for flush. If null, then all
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// memtables in the column family will be selected.
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const uint64_t* max_memtable_id_;
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const EnvOptions env_options_;
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VersionSet* versions_;
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InstrumentedMutex* db_mutex_;
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std::atomic<bool>* shutting_down_;
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std::vector<SequenceNumber> existing_snapshots_;
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SequenceNumber earliest_write_conflict_snapshot_;
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SnapshotChecker* snapshot_checker_;
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JobContext* job_context_;
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LogBuffer* log_buffer_;
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Directory* db_directory_;
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Directory* output_file_directory_;
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CompressionType output_compression_;
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Statistics* stats_;
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EventLogger* event_logger_;
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TableProperties table_properties_;
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bool measure_io_stats_;
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// True if this flush job should call fsync on the output directory. False
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// otherwise.
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// Usually sync_output_directory_ is true. A flush job needs to call sync on
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// the output directory before committing to the MANIFEST.
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// However, an individual flush job does not have to call sync on the output
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// directory if it is part of an atomic flush. After all flush jobs in the
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// atomic flush succeed, call sync once on each distinct output directory.
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const bool sync_output_directory_;
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// True if this flush job should write to MANIFEST after successfully
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// flushing memtables. False otherwise.
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// Usually write_manifest_ is true. A flush job commits to the MANIFEST after
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// flushing the memtables.
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// However, an individual flush job cannot rashly write to the MANIFEST
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// immediately after it finishes the flush if it is part of an atomic flush.
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// In this case, only after all flush jobs succeed in flush can RocksDB
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// commit to the MANIFEST.
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const bool write_manifest_;
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// Variables below are set by PickMemTable():
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FileMetaData meta_;
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autovector<MemTable*> mems_;
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VersionEdit* edit_;
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Version* base_;
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bool pick_memtable_called;
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Env::Priority thread_pri_;
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};
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} // namespace rocksdb
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