diff options
author | James Wahlin <james.wahlin@10gen.com> | 2015-06-14 16:13:57 -0400 |
---|---|---|
committer | James Wahlin <james.wahlin@10gen.com> | 2015-09-03 16:20:17 -0400 |
commit | ae9df7fb11cf359686699aeb9539cb6dc35de675 (patch) | |
tree | 239705229d7cfc7d06089a007e2d746ce235287d /src/mongo/db/collection_index_usage_tracker.cpp | |
parent | 2e205e7ee08004436a3f5f1750eb253b15e9027e (diff) | |
download | mongo-ae9df7fb11cf359686699aeb9539cb6dc35de675.tar.gz |
SERVER-2227 Addition of index usage statistics
Diffstat (limited to 'src/mongo/db/collection_index_usage_tracker.cpp')
-rw-r--r-- | src/mongo/db/collection_index_usage_tracker.cpp | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/src/mongo/db/collection_index_usage_tracker.cpp b/src/mongo/db/collection_index_usage_tracker.cpp new file mode 100644 index 00000000000..10894bcfe6e --- /dev/null +++ b/src/mongo/db/collection_index_usage_tracker.cpp @@ -0,0 +1,70 @@ +/** + * Copyright (C) 2014 MongoDB 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. + */ + +#define MONGO_LOG_DEFAULT_COMPONENT ::mongo::logger::LogComponent::kStorage + +#include "mongo/platform/basic.h" + +#include "mongo/db/collection_index_usage_tracker.h" +#include "mongo/util/assert_util.h" +#include "mongo/util/clock_source.h" +#include "mongo/util/log.h" + +namespace mongo { + +CollectionIndexUsageTracker::CollectionIndexUsageTracker(ClockSource* clockSource) + : _clockSource(clockSource) { + invariant(_clockSource); +} + +void CollectionIndexUsageTracker::recordIndexAccess(StringData indexName) { + invariant(!indexName.empty()); + dassert(_indexUsageMap.find(indexName) != _indexUsageMap.end()); + + _indexUsageMap[indexName].accesses.fetchAndAdd(1); +} + +void CollectionIndexUsageTracker::registerIndex(StringData indexName) { + invariant(!indexName.empty()); + dassert(_indexUsageMap.find(indexName) == _indexUsageMap.end()); + + // Create map entry. + _indexUsageMap[indexName] = IndexUsageStats(_clockSource->now()); +} + +void CollectionIndexUsageTracker::unregisterIndex(StringData indexName) { + invariant(!indexName.empty()); + + _indexUsageMap.erase(indexName); +} + +CollectionIndexUsageMap CollectionIndexUsageTracker::getUsageStats() const { + return _indexUsageMap; +} + +} // namespace mongo |