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// 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).
#pragma once
#include <stddef.h>
#include <stdint.h>
#include <string>
namespace rocksdb {
struct CompactionJobStats {
CompactionJobStats() { Reset(); }
void Reset();
// Aggregate the CompactionJobStats from another instance with this one
void Add(const CompactionJobStats& stats);
// the elapsed time of this compaction in microseconds.
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.
// this could be a new value or a deletion entry for that key so this field
// sums up all updated and deleted keys
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;
// the number of deletion entries before compaction. Deletion entries
// can disappear after compaction because they expired
uint64_t num_input_deletion_records;
// number of deletion records that were found obsolete and discarded
// because it is not possible to delete any more keys with this entry
// (i.e. all possible deletions resulting from it have been completed)
uint64_t num_expired_deletion_records;
// number of corrupt keys (ParseInternalKey returned false when applied to
// the key) encountered and written out.
uint64_t num_corrupt_keys;
// Following counters are only populated if
// options.report_bg_io_stats = true;
// Time spent on file's Append() call.
uint64_t file_write_nanos;
// Time spent on sync file range.
uint64_t file_range_sync_nanos;
// Time spent on file fsync.
uint64_t file_fsync_nanos;
// Time spent on preparing file write (falocate, etc)
uint64_t file_prepare_write_nanos;
// 0-terminated strings storing the first 8 bytes of the smallest and
// largest key in the output.
static const size_t kMaxPrefixLength = 8;
std::string smallest_output_key_prefix;
std::string largest_output_key_prefix;
// number of single-deletes which do not meet a put
uint64_t num_single_del_fallthru;
// number of single-deletes which meet something other than a put
uint64_t num_single_del_mismatch;
} // namespace rocksdb