mirror of
https://github.com/facebook/rocksdb.git
synced 2024-11-26 16:30:56 +00:00
d665afdbf3
Summary: **Context/Summary:** As revealed by heap profiling, allocation of `FileMetaData` for [newly created file added to a Version](https://github.com/facebook/rocksdb/pull/9924/files#diff-a6aa385940793f95a2c5b39cc670bd440c4547fa54fd44622f756382d5e47e43R774) can consume significant heap memory. This PR is to account that toward our global memory limit based on block cache capacity. Pull Request resolved: https://github.com/facebook/rocksdb/pull/9924 Test Plan: - Previous `make check` verified there are only 2 places where the memory of the allocated `FileMetaData` can be released - New unit test `TEST_P(ChargeFileMetadataTestWithParam, Basic)` - db bench (CPU cost of `charge_file_metadata` in write and compact) - **write micros/op: -0.24%** : `TEST_TMPDIR=/dev/shm/testdb ./db_bench -benchmarks=fillseq -db=$TEST_TMPDIR -charge_file_metadata=1 (remove this option for pre-PR) -disable_auto_compactions=1 -write_buffer_size=100000 -num=4000000 | egrep 'fillseq'` - **compact micros/op -0.87%** : `TEST_TMPDIR=/dev/shm/testdb ./db_bench -benchmarks=fillseq -db=$TEST_TMPDIR -charge_file_metadata=1 -disable_auto_compactions=1 -write_buffer_size=100000 -num=4000000 -numdistinct=1000 && ./db_bench -benchmarks=compact -db=$TEST_TMPDIR -use_existing_db=1 -charge_file_metadata=1 -disable_auto_compactions=1 | egrep 'compact'` table 1 - write #-run | (pre-PR) avg micros/op | std micros/op | (post-PR) micros/op | std micros/op | change (%) -- | -- | -- | -- | -- | -- 10 | 3.9711 | 0.264408 | 3.9914 | 0.254563 | 0.5111933721 20 | 3.83905 | 0.0664488 | 3.8251 | 0.0695456 | -0.3633711465 40 | 3.86625 | 0.136669 | 3.8867 | 0.143765 | 0.5289363078 80 | 3.87828 | 0.119007 | 3.86791 | 0.115674 | **-0.2673865734** 160 | 3.87677 | 0.162231 | 3.86739 | 0.16663 | **-0.2419539978** table 2 - compact #-run | (pre-PR) avg micros/op | std micros/op | (post-PR) micros/op | std micros/op | change (%) -- | -- | -- | -- | -- | -- 10 | 2,399,650.00 | 96,375.80 | 2,359,537.00 | 53,243.60 | -1.67 20 | 2,410,480.00 | 89,988.00 | 2,433,580.00 | 91,121.20 | 0.96 40 | 2.41E+06 | 121811 | 2.39E+06 | 131525 | **-0.96** 80 | 2.40E+06 | 134503 | 2.39E+06 | 108799 | **-0.78** - stress test: `python3 tools/db_crashtest.py blackbox --charge_file_metadata=1 --cache_size=1` killed as normal Reviewed By: ajkr Differential Revision: D36055583 Pulled By: hx235 fbshipit-source-id: b60eab94707103cb1322cf815f05810ef0232625
73 lines
2.5 KiB
C++
73 lines
2.5 KiB
C++
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
|
|
// This source code is licensed under both the GPLv2 (found in the
|
|
// COPYING file in the root directory) and Apache 2.0 License
|
|
// (found in the LICENSE.Apache file in the root directory).
|
|
//
|
|
// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style license that can be
|
|
// found in the LICENSE file. See the AUTHORS file for names of contributors.
|
|
//
|
|
#pragma once
|
|
|
|
#include <memory>
|
|
|
|
#include "rocksdb/file_system.h"
|
|
#include "rocksdb/slice_transform.h"
|
|
|
|
namespace ROCKSDB_NAMESPACE {
|
|
|
|
struct ImmutableCFOptions;
|
|
class TableCache;
|
|
class VersionStorageInfo;
|
|
class VersionEdit;
|
|
struct FileMetaData;
|
|
class InternalStats;
|
|
class Version;
|
|
class VersionSet;
|
|
class ColumnFamilyData;
|
|
class CacheReservationManager;
|
|
|
|
// A helper class so we can efficiently apply a whole sequence
|
|
// of edits to a particular state without creating intermediate
|
|
// Versions that contain full copies of the intermediate state.
|
|
class VersionBuilder {
|
|
public:
|
|
VersionBuilder(const FileOptions& file_options,
|
|
const ImmutableCFOptions* ioptions, TableCache* table_cache,
|
|
VersionStorageInfo* base_vstorage, VersionSet* version_set,
|
|
std::shared_ptr<CacheReservationManager>
|
|
file_metadata_cache_res_mgr = nullptr);
|
|
~VersionBuilder();
|
|
|
|
bool CheckConsistencyForNumLevels();
|
|
Status Apply(const VersionEdit* edit);
|
|
Status SaveTo(VersionStorageInfo* vstorage) const;
|
|
Status LoadTableHandlers(
|
|
InternalStats* internal_stats, int max_threads,
|
|
bool prefetch_index_and_filter_in_cache, bool is_initial_load,
|
|
const std::shared_ptr<const SliceTransform>& prefix_extractor,
|
|
size_t max_file_size_for_l0_meta_pin);
|
|
uint64_t GetMinOldestBlobFileNumber() const;
|
|
|
|
private:
|
|
class Rep;
|
|
std::unique_ptr<Rep> rep_;
|
|
};
|
|
|
|
// A wrapper of version builder which references the current version in
|
|
// constructor and unref it in the destructor.
|
|
// Both of the constructor and destructor need to be called inside DB Mutex.
|
|
class BaseReferencedVersionBuilder {
|
|
public:
|
|
explicit BaseReferencedVersionBuilder(ColumnFamilyData* cfd);
|
|
BaseReferencedVersionBuilder(ColumnFamilyData* cfd, Version* v);
|
|
~BaseReferencedVersionBuilder();
|
|
VersionBuilder* version_builder() const { return version_builder_.get(); }
|
|
|
|
private:
|
|
std::unique_ptr<VersionBuilder> version_builder_;
|
|
Version* version_;
|
|
};
|
|
|
|
} // namespace ROCKSDB_NAMESPACE
|