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[rocksdb] names for all metrics provided in statistics.h

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Summary: Provide a  map of histograms and ticker vs strings. Fb303 libraries can use this to provide the mapping. We will not have to duplicate the code during release.

Test Plan: db_bench with statistics=1

Reviewers: dhruba, haobo

Reviewed By: dhruba

CC: leveldb

Differential Revision: https://reviews.facebook.net/D11145
This commit is contained in:
Abhishek Kona 2013-06-10 11:57:55 -07:00
parent 184343a061
commit a4913c5170
1 changed files with 42 additions and 1 deletions
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41
include/leveldb/statistics.h
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@ -6,10 +6,12 @@
#define STORAGE_LEVELDB_INCLUDE_STATISTICS_H_
#include <atomic>
#include <cassert>
#include <cstddef>
#include <cstdint>
#include <string>
#include <memory>
#include <vector>
namespace leveldb {
@ -17,6 +19,7 @@ namespace leveldb {
* Keep adding ticker's here.
* Any ticker should have a value less than TICKER_ENUM_MAX.
* Add a new ticker by assigning it the current value of TICKER_ENUM_MAX
* Add a string representation in TickersNameMap below.
* And incrementing TICKER_ENUM_MAX.
*/
enum Tickers {
@ -58,11 +61,35 @@ enum Tickers {
TICKER_ENUM_MAX = 21
};
const std::vector<std::pair<Tickers, std::string>> TickersNameMap = {
std::make_pair(BLOCK_CACHE_MISS, "levledb.block.cache.miss"),
std::make_pair(BLOCK_CACHE_HIT, "rocksdb.block.cache.hit"),
std::make_pair(BLOOM_FILTER_USEFUL, "rocksdb.bloom.filter.useful"),
std::make_pair(COMPACTION_KEY_DROP_NEWER_ENTRY, "rocksdb.compaction.key.drop.new"),
std::make_pair(COMPACTION_KEY_DROP_OBSOLETE, "rocksdb.compaction.key.drop.obsolete"),
std::make_pair(COMPACTION_KEY_DROP_USER, "rocksdb.compaction.key.drop.user"),
std::make_pair(NUMBER_KEYS_WRITTEN, "rocksdb.number.keys.written"),
std::make_pair(NUMBER_KEYS_READ, "rocksdb.number.keys.read"),
std::make_pair(BYTES_WRITTEN, "rocksdb.bytes.written"),
std::make_pair(BYTES_READ, "rocksdb.bytes.read"),
std::make_pair(NO_FILE_CLOSES, "rocksdb.no.file.closes"),
std::make_pair(NO_FILE_OPENS, "rocksdb.no.file.opens"),
std::make_pair(NO_FILE_ERRORS, "rocksdb.no.file.errors"),
std::make_pair(STALL_L0_SLOWDOWN_MICROS, "rocksdb.l0.slowdown.micros"),
std::make_pair(STALL_MEMTABLE_COMPACTION_MICROS, "rocksdb.memtable.compaction.micros"),
std::make_pair(STALL_L0_NUM_FILES_MICROS, "rocksdb.l0.num.files.stall.micros"),
std::make_pair(RATE_LIMIT_DELAY_MILLIS, "rocksdb.rate.limit.dleay.millis"),
std::make_pair(NO_ITERATORS, "rocksdb.num.iterators"),
std::make_pair(NUMBER_MULTIGET_CALLS, "rocksdb.number.multiget.get"),
std::make_pair(NUMBER_MULTIGET_KEYS_READ, "rocksdb.number.multiget.keys.read"),
std::make_pair(NUMBER_MULTIGET_BYTES_READ, "rocksdb.number.multiget.bytes.read")
};
/**
* Keep adding histogram's here.
* Any histogram whould have value less than HISTOGRAM_ENUM_MAX
* Add a new Histogram by assigning it the current value of HISTOGRAM_ENUM_MAX
* Add a string representation in HistogramsNameMap below
* And increment HISTOGRAM_ENUM_MAX
*/
enum Histograms {
@ -79,6 +106,18 @@ enum Histograms {
HISTOGRAM_ENUM_MAX = 9
};
const std::vector<std::pair<Histograms, std::string>> HistogramsNameMap = {
std::make_pair(DB_GET, "rocksdb.db.get.micros"),
std::make_pair(DB_WRITE, "rocksdb.db.write.micros"),
std::make_pair(COMPACTION_TIME, "rocksdb.compaction.times.micros"),
std::make_pair(TABLE_SYNC_MICROS, "rocksdb.table.sync.micros"),
std::make_pair(COMPACTION_OUTFILE_SYNC_MICROS, "rocksdb.compaction.outfile.sync.micros"),
std::make_pair(WAL_FILE_SYNC_MICROS, "rocksdb.wal.file.sync.micros"),
std::make_pair(MANIFEST_FILE_SYNC_MICROS, "rocksdb.manifest.file.sync.micros"),
std::make_pair(TABLE_OPEN_IO_MICROS, "rocksdb.table.open.io.micros"),
std::make_pair(DB_MULTIGET, "rocksdb.db.multiget.micros")
};
struct HistogramData {
double median;
double percentile95;
@ -150,6 +189,8 @@ std::shared_ptr<Statistics> CreateDBStatistics();
inline void RecordTick(std::shared_ptr<Statistics> statistics,
Tickers ticker,
uint64_t count = 1) {
assert(HistogramsNameMap.size() == HISTOGRAM_ENUM_MAX - 1);
assert(TickersNameMap.size() == TICKER_ENUM_MAX -1);
if (statistics) {
statistics->recordTick(ticker, count);
}