95b0e89b5d
Summary: Improve write buffer manager in several ways: 1. Size is tracked when arena block is allocated, rather than every allocation, so that it can better track actual memory usage and the tracking overhead is slightly lower. 2. We start to trigger memtable flush when 7/8 of the memory cap hits, instead of 100%, and make 100% much harder to hit. 3. Allow a cache object to be passed into buffer manager and the size allocated by memtable can be costed there. This can help users have one single memory cap across block cache and memtable. Closes https://github.com/facebook/rocksdb/pull/2350 Differential Revision: D5110648 Pulled By: siying fbshipit-source-id: b4238113094bf22574001e446b5d88523ba00017
50 lines
1.9 KiB
C++
50 lines
1.9 KiB
C++
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
|
|
// This source code is licensed under the BSD-style license found in the
|
|
// LICENSE file in the root directory of this source tree. An additional grant
|
|
// of patent rights can be found in the PATENTS file in the same 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
|
|
#ifndef ROCKSDB_LITE
|
|
#include "rocksdb/slice_transform.h"
|
|
#include "rocksdb/memtablerep.h"
|
|
|
|
namespace rocksdb {
|
|
|
|
class HashLinkListRepFactory : public MemTableRepFactory {
|
|
public:
|
|
explicit HashLinkListRepFactory(size_t bucket_count,
|
|
uint32_t threshold_use_skiplist,
|
|
size_t huge_page_tlb_size,
|
|
int bucket_entries_logging_threshold,
|
|
bool if_log_bucket_dist_when_flash)
|
|
: bucket_count_(bucket_count),
|
|
threshold_use_skiplist_(threshold_use_skiplist),
|
|
huge_page_tlb_size_(huge_page_tlb_size),
|
|
bucket_entries_logging_threshold_(bucket_entries_logging_threshold),
|
|
if_log_bucket_dist_when_flash_(if_log_bucket_dist_when_flash) {}
|
|
|
|
virtual ~HashLinkListRepFactory() {}
|
|
|
|
using MemTableRepFactory::CreateMemTableRep;
|
|
virtual MemTableRep* CreateMemTableRep(
|
|
const MemTableRep::KeyComparator& compare, Allocator* allocator,
|
|
const SliceTransform* transform, Logger* logger) override;
|
|
|
|
virtual const char* Name() const override {
|
|
return "HashLinkListRepFactory";
|
|
}
|
|
|
|
private:
|
|
const size_t bucket_count_;
|
|
const uint32_t threshold_use_skiplist_;
|
|
const size_t huge_page_tlb_size_;
|
|
int bucket_entries_logging_threshold_;
|
|
bool if_log_bucket_dist_when_flash_;
|
|
};
|
|
|
|
}
|
|
#endif // ROCKSDB_LITE
|