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// @file dur_stats.h
/**
* Copyright (C) 2012 10gen Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the GNU Affero General Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#include "mongo/db/jsobj.h"
namespace mongo {
namespace dur {
/** journaling stats. the model here is that the commit thread is the only writer, and that reads
* are uncommon (from a serverStatus command and such). Thus, there should not be multicore chatter
* overhead.
*/
struct Stats {
struct S {
std::string _CSVHeader() const;
std::string _asCSV() const;
void _asObj(BSONObjBuilder* builder) const;
void reset();
uint64_t getCurrentDurationMillis() const {
return ((curTimeMicros64() - _startTimeMicros) / 1000);
}
// Not reported. Internal use only.
uint64_t _startTimeMicros;
// Reported statistics
unsigned _durationMillis;
unsigned _commits;
unsigned _commitsInWriteLock;
uint64_t _journaledBytes;
uint64_t _uncompressedBytes;
uint64_t _writeToDataFilesBytes;
uint64_t _prepLogBufferMicros;
uint64_t _writeToJournalMicros;
uint64_t _writeToDataFilesMicros;
uint64_t _remapPrivateViewMicros;
uint64_t _commitsMicros;
uint64_t _commitsInWriteLockMicros;
};
Stats();
void reset();
BSONObj asObj() const;
const S* curr() const {
return &_stats[_currIdx];
}
S* curr() {
return &_stats[_currIdx];
}
private:
S _stats[5];
unsigned _currIdx;
};
extern Stats stats;
}
}
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