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[Rocksdb] measure table open io in a histogram

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Summary: as title

Test Plan: db_bench --statistics=1 check for statistic.

Reviewers: dhruba, haobo

Reviewed By: dhruba

CC: leveldb

Differential Revision: https://reviews.facebook.net/D11109
This commit is contained in:
Abhishek Kona 2013-06-07 10:02:28 -07:00
parent 8ef328ee6a
commit e982b5a489
3 changed files with 7 additions and 2 deletions
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1
db/db_bench.cc
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@ -742,6 +742,7 @@ class Benchmark {
"COMPACTION OUT FILE SYNC MICROS");
PrintHistogram(WAL_FILE_SYNC_MICROS, "WAL FILE SYNC MICROS");
PrintHistogram(MANIFEST_FILE_SYNC_MICROS, "Manifest SYNC MICROS");
PrintHistogram(TABLE_OPEN_IO_MICROS, "Table Open IO Micros");
}
}

2
db/table_cache.cc
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@ -9,6 +9,7 @@
#include "leveldb/statistics.h"
#include "table/table.h"
#include "util/coding.h"
#include "util/stop_watch.h"
namespace leveldb {
@ -57,6 +58,7 @@ Status TableCache::FindTable(const EnvOptions& toptions,
if (options_->advise_random_on_open) {
file->Hint(RandomAccessFile::RANDOM);
}
StopWatch sw(env_, options_->statistics, TABLE_OPEN_IO_MICROS);
s = Table::Open(*options_, toptions, std::move(file), file_size, &table);
}

6
include/leveldb/statistics.h
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@ -73,8 +73,10 @@ enum Histograms {
COMPACTION_OUTFILE_SYNC_MICROS = 4,
WAL_FILE_SYNC_MICROS = 5,
MANIFEST_FILE_SYNC_MICROS = 6,
DB_MULTIGET = 7,
HISTOGRAM_ENUM_MAX = 8
// TIME SPENT IN IO DURING TABLE OPEN
TABLE_OPEN_IO_MICROS = 7,
DB_MULTIGET = 8,
HISTOGRAM_ENUM_MAX = 9
};
struct HistogramData {