Revision 86a0133d0527a1005ebd9b517fa973c1a4a0a1ae authored by sdong on 23 April 2014, 01:31:55 UTC, committed by sdong on 23 April 2014, 02:29:05 UTC
Summary: This is a temp solution to expose index sizes to users from PlainTableReader before we persistent them to files. In this patch, the memory consumption of indexes used by PlainTableReader will be reported as two user defined properties, so that users can monitor them. Test Plan: Add a unit test. make all check` Reviewers: haobo, ljin Reviewed By: haobo CC: nkg-, yhchiang, igor, ljin, dhruba, leveldb Differential Revision: https://reviews.facebook.net/D18195
1 parent 1068d2f
statistics.cc
// 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.
//
#include "util/statistics.h"
#include "rocksdb/statistics.h"
#include <algorithm>
#include <cstdio>
namespace rocksdb {
std::shared_ptr<Statistics> CreateDBStatistics() {
return std::make_shared<StatisticsImpl>();
}
StatisticsImpl::StatisticsImpl() {}
StatisticsImpl::~StatisticsImpl() {}
long StatisticsImpl::getTickerCount(Tickers tickerType) {
assert(tickerType < TICKER_ENUM_MAX);
return tickers_[tickerType].value;
}
void StatisticsImpl::setTickerCount(Tickers tickerType, uint64_t count) {
assert(tickerType < TICKER_ENUM_MAX);
tickers_[tickerType].value = count;
}
void StatisticsImpl::recordTick(Tickers tickerType, uint64_t count) {
assert(tickerType < TICKER_ENUM_MAX);
tickers_[tickerType].value += count;
}
void StatisticsImpl::measureTime(Histograms histogramType, uint64_t value) {
assert(histogramType < HISTOGRAM_ENUM_MAX);
histograms_[histogramType].Add(value);
}
void StatisticsImpl::histogramData(Histograms histogramType,
HistogramData* const data) {
assert(histogramType < HISTOGRAM_ENUM_MAX);
histograms_[histogramType].Data(data);
}
namespace {
// a buffer size used for temp string buffers
const int kBufferSize = 200;
std::string HistogramToString (
Statistics* dbstats,
const Histograms& histogram_type,
const std::string& name) {
char buffer[kBufferSize];
HistogramData histogramData;
dbstats->histogramData(histogram_type, &histogramData);
snprintf(
buffer,
kBufferSize,
"%s statistics Percentiles :=> 50 : %f 95 : %f 99 : %f\n",
name.c_str(),
histogramData.median,
histogramData.percentile95,
histogramData.percentile99
);
return std::string(buffer);
};
std::string TickerToString(Statistics* dbstats, const Tickers& ticker,
const std::string& name) {
char buffer[kBufferSize];
snprintf(buffer, kBufferSize, "%s COUNT : %ld\n",
name.c_str(), dbstats->getTickerCount(ticker));
return std::string(buffer);
};
} // namespace
std::string Statistics::ToString() {
std::string res;
res.reserve(20000);
for (const auto& t : TickersNameMap) {
res.append(TickerToString(this, t.first, t.second));
}
for (const auto& h : HistogramsNameMap) {
res.append(HistogramToString(this, h.first, h.second));
}
res.shrink_to_fit();
return res;
}
} // namespace rocksdb
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