7d7ee2b654
Summary: This patch introduces utilities/memory, which currently includes GetApproximateMemoryUsageByType that reports different types of rocksdb memory usage given a list of input DBs. The API also take care of the case where Cache could be shared across multiple column families / multiple db instances. Currently, it reports memory usage of memtable, table-readers and cache. Test Plan: utilities/memory/memory_test.cc Reviewers: igor, anthony, IslamAbdelRahman, sdong Reviewed By: sdong Subscribers: dhruba, leveldb Differential Revision: https://reviews.facebook.net/D49257
53 lines
1.5 KiB
C++
53 lines
1.5 KiB
C++
// Copyright (c) 2013, Facebook, Inc. All rights reserved.
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// This source code is licensed under the BSD-style license found in the
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// LICENSE file in the root directory of this source tree. An additional grant
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// of patent rights can be found in the PATENTS file in the same directory.
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#ifndef ROCKSDB_LITE
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#include "rocksdb/utilities/memory_util.h"
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#include "db/db_impl.h"
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namespace rocksdb {
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Status MemoryUtil::GetApproximateMemoryUsageByType(
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const std::vector<DB*>& dbs,
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const std::unordered_set<const Cache*> cache_set,
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std::map<MemoryUtil::UsageType, uint64_t>* usage_by_type) {
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usage_by_type->clear();
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// MemTable
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for (auto* db : dbs) {
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uint64_t usage = 0;
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if (db->GetAggregatedIntProperty(DB::Properties::kSizeAllMemTables,
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&usage)) {
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(*usage_by_type)[MemoryUtil::kMemTableTotal] += usage;
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}
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if (db->GetAggregatedIntProperty(DB::Properties::kCurSizeAllMemTables,
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&usage)) {
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(*usage_by_type)[MemoryUtil::kMemTableUnFlushed] += usage;
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}
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}
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// Table Readers
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for (auto* db : dbs) {
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uint64_t usage = 0;
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if (db->GetAggregatedIntProperty(DB::Properties::kEstimateTableReadersMem,
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&usage)) {
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(*usage_by_type)[MemoryUtil::kTableReadersTotal] += usage;
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}
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}
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// Cache
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for (const auto* cache : cache_set) {
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if (cache != nullptr) {
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(*usage_by_type)[MemoryUtil::kCacheTotal] += cache->GetUsage();
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}
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}
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return Status::OK();
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}
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} // namespace rocksdb
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#endif // !ROCKSDB_LITE
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