fork of https://github.com/oxigraph/rocksdb and https://github.com/facebook/rocksdb for nextgraph and oxigraph
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
70 lines
2.3 KiB
70 lines
2.3 KiB
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
|
|
// This source code is licensed under both the GPLv2 (found in the
|
|
// COPYING file in the root directory) and Apache 2.0 License
|
|
// (found in the LICENSE.Apache file in the root directory).
|
|
|
|
#pragma once
|
|
|
|
#ifndef ROCKSDB_LITE
|
|
|
|
#include "db/db_impl/db_impl.h"
|
|
#include "util/timer.h"
|
|
|
|
namespace ROCKSDB_NAMESPACE {
|
|
|
|
// PeriodicWorkScheduler is a singleton object, which is scheduling/running
|
|
// DumpStats(), PersistStats(), and FlushInfoLog() for all DB instances. All DB
|
|
// instances use the same object from `Default()`.
|
|
//
|
|
// Internally, it uses a single threaded timer object to run the periodic work
|
|
// functions. Timer thread will always be started since the info log flushing
|
|
// cannot be disabled.
|
|
class PeriodicWorkScheduler {
|
|
public:
|
|
static PeriodicWorkScheduler* Default();
|
|
|
|
PeriodicWorkScheduler() = delete;
|
|
PeriodicWorkScheduler(const PeriodicWorkScheduler&) = delete;
|
|
PeriodicWorkScheduler(PeriodicWorkScheduler&&) = delete;
|
|
PeriodicWorkScheduler& operator=(const PeriodicWorkScheduler&) = delete;
|
|
PeriodicWorkScheduler& operator=(PeriodicWorkScheduler&&) = delete;
|
|
|
|
void Register(DBImpl* dbi, unsigned int stats_dump_period_sec,
|
|
unsigned int stats_persist_period_sec);
|
|
|
|
void Unregister(DBImpl* dbi);
|
|
|
|
// Periodically flush info log out of application buffer at a low frequency.
|
|
// This improves debuggability in case of RocksDB hanging since it ensures the
|
|
// log messages leading up to the hang will eventually become visible in the
|
|
// log.
|
|
static const uint64_t kDefaultFlushInfoLogPeriodSec = 10;
|
|
|
|
protected:
|
|
std::unique_ptr<Timer> timer;
|
|
|
|
explicit PeriodicWorkScheduler(Env* env);
|
|
|
|
private:
|
|
std::string GetTaskName(DBImpl* dbi, const std::string& func_name);
|
|
};
|
|
|
|
#ifndef NDEBUG
|
|
// PeriodicWorkTestScheduler is for unittest, which can specify the Env like
|
|
// SafeMockTimeEnv. It also contains functions for unittest.
|
|
class PeriodicWorkTestScheduler : public PeriodicWorkScheduler {
|
|
public:
|
|
static PeriodicWorkTestScheduler* Default(Env* env);
|
|
|
|
void TEST_WaitForRun(std::function<void()> callback) const;
|
|
|
|
size_t TEST_GetValidTaskNum() const;
|
|
|
|
private:
|
|
explicit PeriodicWorkTestScheduler(Env* env);
|
|
};
|
|
#endif // !NDEBUG
|
|
|
|
} // namespace ROCKSDB_NAMESPACE
|
|
|
|
#endif // ROCKSDB_LITE
|
|
|