mirror of
https://github.com/facebook/rocksdb.git
synced 2024-11-27 11:43:49 +00:00
8c265c08f1
Summary: Add two parameters of hash linked list to log distribution of number of entries across all buckets, and a sample row when there are too many entries in one single bucket. Test Plan: Turn it on in plain_table_db_test and see the logs. Reviewers: haobo, ljin Reviewed By: ljin Subscribers: leveldb, nkg-, dhruba, yhchiang Differential Revision: https://reviews.facebook.net/D19095
46 lines
1.6 KiB
C++
46 lines
1.6 KiB
C++
// Copyright (c) 2013, 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.
|
|
|
|
#ifndef ROCKSDB_LITE
|
|
#pragma once
|
|
#include "rocksdb/slice_transform.h"
|
|
#include "rocksdb/memtablerep.h"
|
|
|
|
namespace rocksdb {
|
|
|
|
class HashLinkListRepFactory : public MemTableRepFactory {
|
|
public:
|
|
explicit HashLinkListRepFactory(size_t bucket_count,
|
|
size_t huge_page_tlb_size,
|
|
int bucket_entries_logging_threshold,
|
|
bool if_log_bucket_dist_when_flash)
|
|
: bucket_count_(bucket_count),
|
|
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() {}
|
|
|
|
virtual MemTableRep* CreateMemTableRep(
|
|
const MemTableRep::KeyComparator& compare, Arena* arena,
|
|
const SliceTransform* transform, Logger* logger) override;
|
|
|
|
virtual const char* Name() const override {
|
|
return "HashLinkListRepFactory";
|
|
}
|
|
|
|
private:
|
|
const size_t bucket_count_;
|
|
const size_t huge_page_tlb_size_;
|
|
int bucket_entries_logging_threshold_;
|
|
bool if_log_bucket_dist_when_flash_;
|
|
};
|
|
|
|
}
|
|
#endif // ROCKSDB_LITE
|