rocksdb/db/flush_job.h
Yueh-Hsuan Chiang 181191a1e4 Add a counter for collecting the wait time on db mutex.
Summary:
Add a counter for collecting the wait time on db mutex.
Also add MutexWrapper and CondVarWrapper for measuring wait time.

Test Plan:
./db_test
export ROCKSDB_TESTS=MutexWaitStats
./db_test

verify stats output using db_bench
make clean
make release
./db_bench --statistics=1 --benchmarks=fillseq,readwhilewriting --num=10000 --threads=10

Sample output:
    rocksdb.db.mutex.wait.micros COUNT : 7546866

Reviewers: MarkCallaghan, rven, sdong, igor

Reviewed By: igor

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D32787
2015-02-04 21:39:45 -08:00

88 lines
2.7 KiB
C++

// Copyright (c) 2013, Facebook, Inc. All rights reserved.
// This source code is licensed under the BSD-style license found in the
// LICENSE file in the root directory of this source tree. An additional grant
// of patent rights can be found in the PATENTS file in the same directory.
//
// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file. See the AUTHORS file for names of contributors.
#pragma once
#include <atomic>
#include <deque>
#include <limits>
#include <set>
#include <utility>
#include <vector>
#include <string>
#include "db/dbformat.h"
#include "db/log_writer.h"
#include "db/snapshot.h"
#include "db/column_family.h"
#include "db/version_edit.h"
#include "db/memtable_list.h"
#include "port/port.h"
#include "rocksdb/db.h"
#include "rocksdb/env.h"
#include "rocksdb/memtablerep.h"
#include "rocksdb/transaction_log.h"
#include "util/autovector.h"
#include "util/instrumented_mutex.h"
#include "util/stop_watch.h"
#include "util/thread_local.h"
#include "util/scoped_arena_iterator.h"
#include "db/internal_stats.h"
#include "db/write_controller.h"
#include "db/flush_scheduler.h"
#include "db/write_thread.h"
#include "db/job_context.h"
namespace rocksdb {
class MemTable;
class TableCache;
class Version;
class VersionEdit;
class VersionSet;
class Arena;
class FlushJob {
public:
// TODO(icanadi) make effort to reduce number of parameters here
// IMPORTANT: mutable_cf_options needs to be alive while FlushJob is alive
FlushJob(const std::string& dbname, ColumnFamilyData* cfd,
const DBOptions& db_options,
const MutableCFOptions& mutable_cf_options,
const EnvOptions& env_options, VersionSet* versions,
InstrumentedMutex* db_mutex, std::atomic<bool>* shutting_down,
SequenceNumber newest_snapshot, JobContext* job_context,
LogBuffer* log_buffer, Directory* db_directory,
Directory* output_file_directory, CompressionType output_compression,
Statistics* stats);
~FlushJob() {}
Status Run(uint64_t* file_number = nullptr);
private:
Status WriteLevel0Table(const autovector<MemTable*>& mems, VersionEdit* edit,
uint64_t* filenumber);
const std::string& dbname_;
ColumnFamilyData* cfd_;
const DBOptions& db_options_;
const MutableCFOptions& mutable_cf_options_;
const EnvOptions& env_options_;
VersionSet* versions_;
InstrumentedMutex* db_mutex_;
std::atomic<bool>* shutting_down_;
SequenceNumber newest_snapshot_;
JobContext* job_context_;
LogBuffer* log_buffer_;
Directory* db_directory_;
Directory* output_file_directory_;
CompressionType output_compression_;
Statistics* stats_;
};
} // namespace rocksdb