[Rocksdb] measure table open io in a histogram
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
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@ -742,6 +742,7 @@ class Benchmark {
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"COMPACTION OUT FILE SYNC MICROS");
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"COMPACTION OUT FILE SYNC MICROS");
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PrintHistogram(WAL_FILE_SYNC_MICROS, "WAL FILE SYNC MICROS");
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PrintHistogram(WAL_FILE_SYNC_MICROS, "WAL FILE SYNC MICROS");
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PrintHistogram(MANIFEST_FILE_SYNC_MICROS, "Manifest SYNC MICROS");
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PrintHistogram(MANIFEST_FILE_SYNC_MICROS, "Manifest SYNC MICROS");
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PrintHistogram(TABLE_OPEN_IO_MICROS, "Table Open IO Micros");
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}
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}
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}
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}
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@ -9,6 +9,7 @@
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#include "leveldb/statistics.h"
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#include "leveldb/statistics.h"
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#include "table/table.h"
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#include "table/table.h"
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#include "util/coding.h"
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#include "util/coding.h"
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#include "util/stop_watch.h"
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namespace leveldb {
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namespace leveldb {
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@ -57,6 +58,7 @@ Status TableCache::FindTable(const EnvOptions& toptions,
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if (options_->advise_random_on_open) {
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if (options_->advise_random_on_open) {
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file->Hint(RandomAccessFile::RANDOM);
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file->Hint(RandomAccessFile::RANDOM);
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}
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}
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StopWatch sw(env_, options_->statistics, TABLE_OPEN_IO_MICROS);
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s = Table::Open(*options_, toptions, std::move(file), file_size, &table);
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s = Table::Open(*options_, toptions, std::move(file), file_size, &table);
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}
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}
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@ -73,8 +73,10 @@ enum Histograms {
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COMPACTION_OUTFILE_SYNC_MICROS = 4,
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COMPACTION_OUTFILE_SYNC_MICROS = 4,
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WAL_FILE_SYNC_MICROS = 5,
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WAL_FILE_SYNC_MICROS = 5,
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MANIFEST_FILE_SYNC_MICROS = 6,
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MANIFEST_FILE_SYNC_MICROS = 6,
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DB_MULTIGET = 7,
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// TIME SPENT IN IO DURING TABLE OPEN
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HISTOGRAM_ENUM_MAX = 8
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TABLE_OPEN_IO_MICROS = 7,
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DB_MULTIGET = 8,
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HISTOGRAM_ENUM_MAX = 9
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};
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};
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struct HistogramData {
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struct HistogramData {
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