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/**
* Copyright (C) 2023-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/s/query_analysis_sample_tracker.h"
#include "mongo/logv2/log.h"
#include "mongo/s/analyze_shard_key_common_gen.h"
#include "mongo/s/is_mongos.h"
#define MONGO_LOGV2_DEFAULT_COMPONENT ::mongo::logv2::LogComponent::kSharding
namespace mongo {
namespace analyze_shard_key {
namespace {
const auto getQueryAnalysisSampleTracker =
ServiceContext::declareDecoration<QueryAnalysisSampleTracker>();
} // namespace
QueryAnalysisSampleTracker& QueryAnalysisSampleTracker::get(OperationContext* opCtx) {
return get(opCtx->getServiceContext());
}
QueryAnalysisSampleTracker& QueryAnalysisSampleTracker::get(ServiceContext* serviceContext) {
return getQueryAnalysisSampleTracker(serviceContext);
}
void QueryAnalysisSampleTracker::refreshConfigurations(
const std::vector<CollectionQueryAnalyzerConfiguration>& configurations) {
stdx::lock_guard<Latch> lk(_mutex);
std::map<NamespaceString, std::shared_ptr<QueryAnalysisSampleTracker::CollectionSampleTracker>>
newTrackers;
for (const auto& configuration : configurations) {
auto it = _trackers.find(configuration.getNs());
if (it == _trackers.end() ||
it->second->getCollUuid() != configuration.getCollectionUuid()) {
// There is no existing CollectionSampleTracker for the collection with this specific
// collection uuid so create one for it.
newTrackers.emplace(std::make_pair(
configuration.getNs(),
std::make_shared<CollectionSampleTracker>(configuration.getNs(),
configuration.getCollectionUuid(),
configuration.getSampleRate(),
configuration.getStartTime())));
} else {
it->second->setSampleRate(configuration.getSampleRate());
it->second->setStartTime(configuration.getStartTime());
newTrackers.emplace(std::make_pair(configuration.getNs(), it->second));
}
_sampledNamespaces.insert(configuration.getNs());
}
_trackers = std::move(newTrackers);
}
void QueryAnalysisSampleTracker::incrementReads(OperationContext* opCtx,
const NamespaceString& nss,
const boost::optional<UUID>& collUuid,
boost::optional<int64_t> size) {
stdx::lock_guard<Latch> lk(_mutex);
auto counters = _getOrCreateCollectionSampleTracker(lk, opCtx, nss, collUuid);
counters->incrementReads(size);
++_totalSampledReadsCount;
if (size) {
_totalSampledReadsBytes += *size;
}
}
void QueryAnalysisSampleTracker::incrementWrites(OperationContext* opCtx,
const NamespaceString& nss,
const boost::optional<UUID>& collUuid,
boost::optional<int64_t> size) {
stdx::lock_guard<Latch> lk(_mutex);
auto counters = _getOrCreateCollectionSampleTracker(lk, opCtx, nss, collUuid);
counters->incrementWrites(size);
++_totalSampledWritesCount;
if (size) {
_totalSampledWritesBytes += *size;
}
}
std::shared_ptr<QueryAnalysisSampleTracker::CollectionSampleTracker>
QueryAnalysisSampleTracker::_getOrCreateCollectionSampleTracker(
WithLock,
OperationContext* opCtx,
const NamespaceString& nss,
const boost::optional<UUID>& collUuid) {
auto it = _trackers.find(nss);
if (it == _trackers.end()) {
// Do not create a new set of counters without collUuid specified:
invariant(collUuid);
auto startTime = opCtx->getServiceContext()->getFastClockSource()->now();
it = _trackers
.emplace(std::make_pair(
nss,
std::make_shared<QueryAnalysisSampleTracker::CollectionSampleTracker>(
nss, *collUuid, 0 /* sampleRate */, startTime)))
.first;
_sampledNamespaces.insert(nss);
}
return it->second;
}
void QueryAnalysisSampleTracker::reportForCurrentOp(std::vector<BSONObj>* ops) const {
stdx::lock_guard<Latch> lk(_mutex);
for (auto const& it : _trackers) {
ops->push_back(it.second->reportForCurrentOp());
}
}
BSONObj QueryAnalysisSampleTracker::CollectionSampleTracker::reportForCurrentOp() const {
CollectionSampleCountersCurrentOp report;
report.setNs(_nss);
report.setCollUuid(_collUuid);
report.setSampledReadsCount(_sampledReadsCount);
report.setSampledWritesCount(_sampledWritesCount);
if (!isMongos()) {
report.setSampledReadsBytes(_sampledReadsBytes);
report.setSampledWritesBytes(_sampledWritesBytes);
}
if (isMongos() || serverGlobalParams.clusterRole.has(ClusterRole::None)) {
report.setSampleRate(_sampleRate);
}
report.setStartTime(_startTime);
return report.toBSON();
}
BSONObj QueryAnalysisSampleTracker::reportForServerStatus() const {
stdx::lock_guard<Latch> lk(_mutex);
QueryAnalysisServerStatus res;
res.setActiveCollections(static_cast<int64_t>(_trackers.size()));
res.setTotalCollections(static_cast<int64_t>(_sampledNamespaces.size()));
res.setTotalSampledReadsCount(_totalSampledReadsCount);
res.setTotalSampledWritesCount(_totalSampledWritesCount);
if (!isMongos()) {
res.setTotalSampledReadsBytes(_totalSampledReadsBytes);
res.setTotalSampledWritesBytes(_totalSampledWritesBytes);
}
return res.toBSON();
}
bool QueryAnalysisSampleTracker::isSamplingActive(const NamespaceString& nss,
const UUID& collUuid) {
stdx::lock_guard<Latch> lk(_mutex);
auto it = _trackers.find(nss);
if (it == _trackers.end()) {
return false;
}
auto& tracker = it->second;
return tracker->getCollUuid() == collUuid;
}
} // namespace analyze_shard_key
} // namespace mongo
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