fe5c6321cb
Summary:
Allow EventListener::OnCompactionCompleted to return CompactionJobStats,
which contains useful information about a compaction.
Example CompactionJobStats returned by OnCompactionCompleted():
smallest_output_key_prefix 05000000
largest_output_key_prefix 06990000
elapsed_time 42419
num_input_records 300
num_input_files 3
num_input_files_at_output_level 2
num_output_records 200
num_output_files 1
actual_bytes_input 167200
actual_bytes_output 110688
total_input_raw_key_bytes 5400
total_input_raw_value_bytes 300000
num_records_replaced 100
is_manual_compaction 1
Test Plan: Developed a mega test in db_test which covers 20 variables in CompactionJobStats.
Reviewers: rven, igor, anthony, sdong
Reviewed By: sdong
Subscribers: tnovak, dhruba, leveldb
Differential Revision: https://reviews.facebook.net/D38463
52 lines
1.6 KiB
C++
52 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.
|
|
|
|
#pragma once
|
|
#include <stddef.h>
|
|
#include <stdint.h>
|
|
|
|
namespace rocksdb {
|
|
struct CompactionJobStats {
|
|
CompactionJobStats() { Reset(); }
|
|
void Reset();
|
|
|
|
// the elapsed time in micro of this compaction.
|
|
uint64_t elapsed_micros;
|
|
|
|
// the number of compaction input records.
|
|
uint64_t num_input_records;
|
|
// the number of compaction input files.
|
|
size_t num_input_files;
|
|
// the number of compaction input files at the output level.
|
|
size_t num_input_files_at_output_level;
|
|
|
|
// the number of compaction output records.
|
|
uint64_t num_output_records;
|
|
// the number of compaction output files.
|
|
size_t num_output_files;
|
|
|
|
// true if the compaction is a manual compaction
|
|
bool is_manual_compaction;
|
|
|
|
// the size of the compaction input in bytes.
|
|
uint64_t total_input_bytes;
|
|
// the size of the compaction output in bytes.
|
|
uint64_t total_output_bytes;
|
|
|
|
// number of records being replaced by newer record associated with same key
|
|
uint64_t num_records_replaced;
|
|
|
|
// the sum of the uncompressed input keys in bytes.
|
|
uint64_t total_input_raw_key_bytes;
|
|
// the sum of the uncompressed input values in bytes.
|
|
uint64_t total_input_raw_value_bytes;
|
|
|
|
// 0-terminated strings storing the first 8 bytes of the smallest and
|
|
// largest key in the output.
|
|
char smallest_output_key_prefix[9];
|
|
char largest_output_key_prefix[9];
|
|
};
|
|
} // namespace rocksdb
|