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/**
* Copyright (C) 2018-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#include "mongo/platform/basic.h"
#include "mongo/db/transaction_metrics_observer.h"
#include "mongo/db/server_transactions_metrics.h"
#include "mongo/db/transaction_participant.h"
namespace mongo {
void TransactionMetricsObserver::onStart(ServerTransactionsMetrics* serverTransactionsMetrics,
bool isAutoCommit,
TickSource* tickSource,
Date_t curWallClockTime,
Date_t expireDate) {
//
// Per transaction metrics.
//
_singleTransactionStats.setStartTime(tickSource->getTicks(), curWallClockTime);
_singleTransactionStats.setAutoCommit(isAutoCommit);
_singleTransactionStats.setExpireDate(expireDate);
//
// Server wide transactions metrics.
//
serverTransactionsMetrics->incrementTotalStarted();
serverTransactionsMetrics->incrementCurrentOpen();
serverTransactionsMetrics->incrementCurrentInactive();
}
void TransactionMetricsObserver::onChooseReadTimestamp(Timestamp readTimestamp) {
_singleTransactionStats.setReadTimestamp(readTimestamp);
}
void TransactionMetricsObserver::onStash(ServerTransactionsMetrics* serverTransactionsMetrics,
TickSource* tickSource) {
//
// Per transaction metrics.
//
invariant(_singleTransactionStats.isActive());
_singleTransactionStats.setInactive(tickSource, tickSource->getTicks());
//
// Server wide transactions metrics.
//
// We accept possible slight inaccuracies in these counters from non-atomicity.
serverTransactionsMetrics->decrementCurrentActive();
serverTransactionsMetrics->incrementCurrentInactive();
}
void TransactionMetricsObserver::onUnstash(ServerTransactionsMetrics* serverTransactionsMetrics,
TickSource* tickSource) {
//
// Per transaction metrics.
//
invariant(!_singleTransactionStats.isActive());
_singleTransactionStats.setActive(tickSource->getTicks());
//
// Server wide transactions metrics.
//
// We accept possible slight inaccuracies in these counters from non-atomicity.
serverTransactionsMetrics->incrementCurrentActive();
serverTransactionsMetrics->decrementCurrentInactive();
}
void TransactionMetricsObserver::onCommit(ServerTransactionsMetrics* serverTransactionsMetrics,
TickSource* tickSource,
Top* top) {
//
// Per transaction metrics.
//
// After the transaction has been committed, we must update the end time and mark it as
// inactive. We use the same "now" time to prevent skew in the time-related metrics.
auto curTick = tickSource->getTicks();
_singleTransactionStats.setEndTime(curTick);
invariant(_singleTransactionStats.isActive());
_singleTransactionStats.setInactive(tickSource, curTick);
//
// Server wide transactions metrics.
//
serverTransactionsMetrics->incrementTotalCommitted();
serverTransactionsMetrics->decrementCurrentOpen();
serverTransactionsMetrics->decrementCurrentActive();
if (_singleTransactionStats.isPrepared()) {
serverTransactionsMetrics->incrementTotalPreparedThenCommitted();
serverTransactionsMetrics->decrementCurrentPrepared();
}
auto duration =
durationCount<Microseconds>(_singleTransactionStats.getDuration(tickSource, curTick));
top->incrementGlobalTransactionLatencyStats(static_cast<uint64_t>(duration));
}
void TransactionMetricsObserver::_onAbortActive(
ServerTransactionsMetrics* serverTransactionsMetrics, TickSource* tickSource, Top* top) {
auto curTick = tickSource->getTicks();
invariant(_singleTransactionStats.isActive());
_onAbort(serverTransactionsMetrics, curTick, tickSource, top);
//
// Per transaction metrics.
//
_singleTransactionStats.setInactive(tickSource, curTick);
//
// Server wide transactions metrics.
//
serverTransactionsMetrics->decrementCurrentActive();
if (_singleTransactionStats.isPrepared()) {
serverTransactionsMetrics->incrementTotalPreparedThenAborted();
serverTransactionsMetrics->decrementCurrentPrepared();
}
}
void TransactionMetricsObserver::_onAbortInactive(
ServerTransactionsMetrics* serverTransactionsMetrics, TickSource* tickSource, Top* top) {
auto curTick = tickSource->getTicks();
invariant(!_singleTransactionStats.isActive());
invariant(!_singleTransactionStats.isPrepared());
_onAbort(serverTransactionsMetrics, curTick, tickSource, top);
//
// Server wide transactions metrics.
//
serverTransactionsMetrics->decrementCurrentInactive();
}
void TransactionMetricsObserver::onAbort(ServerTransactionsMetrics* serverTransactionsMetrics,
TickSource* tickSource,
Top* top) {
if (_singleTransactionStats.isActive()) {
_onAbortActive(serverTransactionsMetrics, tickSource, top);
} else {
_onAbortInactive(serverTransactionsMetrics, tickSource, top);
}
}
void TransactionMetricsObserver::onTransactionOperation(OperationContext* opCtx,
OpDebug::AdditiveMetrics additiveMetrics,
bool isPrepared) {
// Add the latest operation stats to the aggregate OpDebug::AdditiveMetrics object stored in the
// SingleTransactionStats instance on the TransactionMetricsObserver.
_singleTransactionStats.getOpDebug()->additiveMetrics.add(additiveMetrics);
// If there are valid storage statistics for this operation, put those in the
// SingleTransactionStats instance either by creating a new storageStats instance or by adding
// into an existing storageStats instance stored in SingleTransactionStats.
// WiredTiger doesn't let storage statistics be collected when transaction is prepared.
if (!isPrepared) {
std::shared_ptr<StorageStats> storageStats =
opCtx->recoveryUnit()->getOperationStatistics();
if (storageStats) {
CurOp::get(opCtx)->debug().storageStats = storageStats;
if (!_singleTransactionStats.getOpDebug()->storageStats) {
_singleTransactionStats.getOpDebug()->storageStats = storageStats->getCopy();
} else {
*_singleTransactionStats.getOpDebug()->storageStats += *storageStats;
}
}
}
// Update the LastClientInfo object stored in the SingleTransactionStats instance on the
// TransactionMetricsObserver with this Client's information. This is the last client that ran a
// transaction operation on the txnParticipant.
_singleTransactionStats.updateLastClientInfo(opCtx->getClient());
}
void TransactionMetricsObserver::_onAbort(ServerTransactionsMetrics* serverTransactionsMetrics,
TickSource::Tick curTick,
TickSource* tickSource,
Top* top) {
//
// Per transaction metrics.
//
_singleTransactionStats.setEndTime(curTick);
//
// Server wide transactions metrics.
//
serverTransactionsMetrics->incrementTotalAborted();
serverTransactionsMetrics->decrementCurrentOpen();
auto latency =
durationCount<Microseconds>(_singleTransactionStats.getDuration(tickSource, curTick));
top->incrementGlobalTransactionLatencyStats(static_cast<uint64_t>(latency));
}
void TransactionMetricsObserver::onPrepare(ServerTransactionsMetrics* serverTransactionsMetrics,
TickSource::Tick curTick) {
//
// Per transaction metrics.
//
_singleTransactionStats.setPreparedStartTime(curTick);
serverTransactionsMetrics->incrementCurrentPrepared();
serverTransactionsMetrics->incrementTotalPrepared();
}
} // namespace mongo
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