mirror of https://gitee.com/bigwinds/arangodb
101 lines
3.5 KiB
C++
101 lines
3.5 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// DISCLAIMER
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///
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/// Copyright 2014-2016 ArangoDB GmbH, Cologne, Germany
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/// Copyright 2004-2014 triAGENS GmbH, Cologne, Germany
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///
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/// Licensed under the Apache License, Version 2.0 (the "License");
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/// you may not use this file except in compliance with the License.
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/// You may obtain a copy of the License at
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///
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/// http://www.apache.org/licenses/LICENSE-2.0
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///
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/// Unless required by applicable law or agreed to in writing, software
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/// distributed under the License is distributed on an "AS IS" BASIS,
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/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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/// See the License for the specific language governing permissions and
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/// limitations under the License.
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///
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/// Copyright holder is ArangoDB GmbH, Cologne, Germany
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///
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/// @author Jan Steemann
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////////////////////////////////////////////////////////////////////////////////
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#ifndef ARANGOD_MMFILES_MMFILES_DATAFILE_STATISTICS_H
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#define ARANGOD_MMFILES_MMFILES_DATAFILE_STATISTICS_H 1
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#include "Basics/Common.h"
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#include "Basics/ReadWriteLock.h"
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#include "MMFiles/MMFilesDatafileStatisticsContainer.h"
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#include "VocBase/voc-types.h"
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namespace arangodb {
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/// @brief datafile statistics manager for a single collection
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class MMFilesDatafileStatistics {
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public:
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struct CompactionStats {
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uint64_t _compactionCount;
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uint64_t _compactionBytesRead;
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uint64_t _compactionBytesWritten;
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uint64_t _filesCombined;
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};
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public:
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MMFilesDatafileStatistics(MMFilesDatafileStatistics const&) = delete;
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MMFilesDatafileStatistics& operator=(MMFilesDatafileStatistics const&) = delete;
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MMFilesDatafileStatistics();
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~MMFilesDatafileStatistics();
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public:
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// @brief increase collection statistics
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void compactionRun(uint64_t noCombined, uint64_t read, uint64_t written);
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// @brief get current collection statistics
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MMFilesDatafileStatistics::CompactionStats getStats();
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/// @brief create (empty) statistics for a datafile
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void create(TRI_voc_fid_t);
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/// @brief create statistics for a datafile, using the stats provided
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void create(TRI_voc_fid_t, MMFilesDatafileStatisticsContainer const&);
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/// @brief remove statistics for a datafile
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void remove(TRI_voc_fid_t);
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/// @brief merge statistics for a datafile
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void update(TRI_voc_fid_t, MMFilesDatafileStatisticsContainer const&, bool warn);
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/// @brief merge statistics for a datafile, by copying the stats from another
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void update(TRI_voc_fid_t fid, TRI_voc_fid_t src, bool warn);
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/// @brief replace statistics for a datafile
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void replace(TRI_voc_fid_t, MMFilesDatafileStatisticsContainer const&, bool warn);
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/// @brief increase dead stats for a datafile, if it exists
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void increaseDead(TRI_voc_fid_t, int64_t, int64_t);
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/// @brief increase number of uncollected entries
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void increaseUncollected(TRI_voc_fid_t, int64_t);
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/// @brief return a copy of the datafile statistics for a file
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MMFilesDatafileStatisticsContainer get(TRI_voc_fid_t);
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/// @brief return aggregated datafile statistics for all files
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MMFilesDatafileStatisticsContainer all();
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private:
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/// @brief lock to protect the statistics
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arangodb::basics::ReadWriteLock _lock;
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/// @brief per-file statistics
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std::unordered_map<TRI_voc_fid_t, MMFilesDatafileStatisticsContainer*> _stats;
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// @brief per-collection runtime statistics
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arangodb::basics::ReadWriteLock _statisticsLock;
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MMFilesDatafileStatistics::CompactionStats _localStats;
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};
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} // namespace arangodb
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#endif
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