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28e5a9a9fb
Summary: When measure_io_stats_ is enabled, the volume of logging is beyond the default limit of 512 size. The patch allows the EventLoggerStream to change the limit, and also sets it to 1024 for FlushJob. Pull Request resolved: https://github.com/facebook/rocksdb/pull/6258 Differential Revision: D19279269 Pulled By: maysamyabandeh fbshipit-source-id: 3fb5d468dad488f289ac99d713378177eb7504d6
57 lines
1.8 KiB
C++
57 lines
1.8 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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#pragma once
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#include <ctime>
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#include "memory/arena.h"
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#include "port/sys_time.h"
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#include "rocksdb/env.h"
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#include "util/autovector.h"
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namespace rocksdb {
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class Logger;
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// A class to buffer info log entries and flush them in the end.
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class LogBuffer {
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public:
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// log_level: the log level for all the logs
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// info_log: logger to write the logs to
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LogBuffer(const InfoLogLevel log_level, Logger* info_log);
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// Add a log entry to the buffer. Use default max_log_size.
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// max_log_size indicates maximize log size, including some metadata.
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void AddLogToBuffer(size_t max_log_size, const char* format, va_list ap);
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size_t IsEmpty() const { return logs_.empty(); }
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// Flush all buffered log to the info log.
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void FlushBufferToLog();
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static const size_t kDefaultMaxLogSize = 512;
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private:
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// One log entry with its timestamp
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struct BufferedLog {
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struct timeval now_tv; // Timestamp of the log
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char message[1]; // Beginning of log message
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};
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const InfoLogLevel log_level_;
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Logger* info_log_;
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Arena arena_;
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autovector<BufferedLog*> logs_;
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};
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// Add log to the LogBuffer for a delayed info logging. It can be used when
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// we want to add some logs inside a mutex.
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// max_log_size indicates maximize log size, including some metadata.
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extern void LogToBuffer(LogBuffer* log_buffer, size_t max_log_size,
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const char* format, ...);
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// Same as previous function, but with default max log size.
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extern void LogToBuffer(LogBuffer* log_buffer, const char* format, ...);
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} // namespace rocksdb
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