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/**
* Copyright (C) 2020-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.
*/
#define MONGO_LOG_DEFAULT_COMPONENT ::mongo::logger::LogComponent::kDefault
#include "mongo/platform/basic.h"
#include "mongo/db/service_context_test_fixture.h"
#include "mongo/util/log_global_settings.h"
#include "mongo/util/log_with_sampling.h"
namespace mongo {
namespace {
TEST(LogWithSamplingTest, ShouldLogCorrectlyWhenSampleRateIsSet) {
const auto serviceContext = ServiceContext::make();
const auto client = serviceContext->makeClient("log_with_sampling_test");
const auto opCtx = client->makeOperationContext();
const auto slowOpThresholdMS = Milliseconds(10);
const auto originalSampleRate = serverGlobalParams.sampleRate;
// Set sample rate to always profile a slow operation.
serverGlobalParams.sampleRate = 1;
// Reset sample rate to the original value after the test exits.
ON_BLOCK_EXIT([originalSampleRate] { serverGlobalParams.sampleRate = originalSampleRate; });
// Set the op duration to be greater than slowOpThreshold so that the op is considered slow.
const auto slowOpDurationMS = Milliseconds(11);
// Set verbosity level of operation component to info so that it doesn't log due to the log
// level.
setMinimumLoggedSeverity(MONGO_LOG_DEFAULT_COMPONENT, logger::LogSeverity::Info());
bool shouldLogSlowOp, shouldSample;
std::tie(shouldLogSlowOp, shouldSample) = shouldLogSlowOpWithSampling(
opCtx.get(), MONGO_LOG_DEFAULT_COMPONENT, slowOpDurationMS, slowOpThresholdMS);
// Verify that shouldLogSlowOp is true when the sampleRate is 1.
ASSERT_TRUE(shouldLogSlowOp);
// Verify that shouldSample is true when the sampleRate is 1.
ASSERT_TRUE(shouldSample);
// Set sample rate to never profile a slow operation.
serverGlobalParams.sampleRate = 0;
std::tie(shouldLogSlowOp, shouldSample) = shouldLogSlowOpWithSampling(
opCtx.get(), MONGO_LOG_DEFAULT_COMPONENT, slowOpDurationMS, slowOpThresholdMS);
// Verify that shouldLogSlowOp is false when the sampleRate is 0.
ASSERT_FALSE(shouldLogSlowOp);
// Verify that shouldSample is false when the sampleRate is 0.
ASSERT_FALSE(shouldSample);
}
TEST(LogWithSamplingTest, ShouldAlwaysLogsWithVerbosityLevelDebug) {
const auto serviceContext = ServiceContext::make();
const auto client = serviceContext->makeClient("log_with_sampling_test");
const auto opCtx = client->makeOperationContext();
const auto slowOpThresholdMS = Milliseconds(10);
const auto originalSampleRate = serverGlobalParams.sampleRate;
// Set sample rate to always profile a slow operation.
serverGlobalParams.sampleRate = 1;
// Reset sample rate to the original value after the test exits.
ON_BLOCK_EXIT([originalSampleRate] { serverGlobalParams.sampleRate = originalSampleRate; });
// Set the op duration to be greater than slowMS so that the op is considered slow.
const auto slowOpDurationMS = Milliseconds(11);
// Set verbosity level of operation component to debug so that it should always log.
setMinimumLoggedSeverity(MONGO_LOG_DEFAULT_COMPONENT, logger::LogSeverity::Debug(1));
bool shouldLogSlowOp, shouldSample;
std::tie(shouldLogSlowOp, shouldSample) = shouldLogSlowOpWithSampling(
opCtx.get(), MONGO_LOG_DEFAULT_COMPONENT, slowOpDurationMS, slowOpThresholdMS);
// Verify that shouldLogSlowOp is true when the op is slow.
ASSERT_TRUE(shouldLogSlowOp);
// Verify that shouldSample should be true when the sampleRate is 1.
ASSERT_TRUE(shouldSample);
// Set sample rate to never profile a slow operation.
serverGlobalParams.sampleRate = 0;
std::tie(shouldLogSlowOp, shouldSample) = shouldLogSlowOpWithSampling(
opCtx.get(), MONGO_LOG_DEFAULT_COMPONENT, slowOpDurationMS, slowOpThresholdMS);
// Verify that we should still log even when the sampleRate is 0.
ASSERT_TRUE(shouldLogSlowOp);
// Verify that shouldSample should be false even if shouldLogSlowOp is true.
ASSERT_FALSE(shouldSample);
}
TEST(LogWithSamplingTest, ShouldNotLogFastOp) {
const auto serviceContext = ServiceContext::make();
const auto client = serviceContext->makeClient("log_with_sampling_test");
const auto opCtx = client->makeOperationContext();
const auto slowOpThresholdMS = Milliseconds(10);
const auto originalSampleRate = serverGlobalParams.sampleRate;
// Set sample rate to always profile a slow operation.
serverGlobalParams.sampleRate = 1;
// Reset sample rate to the original value after the test exits.
ON_BLOCK_EXIT([originalSampleRate] { serverGlobalParams.sampleRate = originalSampleRate; });
// Set the op duration to be less than than slowOpThreshold so that the op is considered fast.
const auto fastOpDurationMS = Milliseconds(9);
// Set verbosity level of operation component to info so that it doesn't log due to the log
// level.
setMinimumLoggedSeverity(MONGO_LOG_DEFAULT_COMPONENT, logger::LogSeverity::Info());
bool shouldLogSlowOp, shouldSample;
std::tie(shouldLogSlowOp, shouldSample) = shouldLogSlowOpWithSampling(
opCtx.get(), MONGO_LOG_DEFAULT_COMPONENT, fastOpDurationMS, slowOpThresholdMS);
// Verify that shouldLogSlowOp is false when the op is fast.
ASSERT_FALSE(shouldLogSlowOp);
// Verify that shouldSample is true when the sampleRate is 1.
ASSERT_TRUE(shouldSample);
// Set sample rate to never profile a slow operation.
serverGlobalParams.sampleRate = 0;
std::tie(shouldLogSlowOp, shouldSample) = shouldLogSlowOpWithSampling(
opCtx.get(), MONGO_LOG_DEFAULT_COMPONENT, fastOpDurationMS, slowOpThresholdMS);
// Verify that we should still not log when the sampleRate is 0.
ASSERT_FALSE(shouldLogSlowOp);
// Verify that shouldSample is false when the sampleRate is 0.
ASSERT_FALSE(shouldSample);
}
} // namespace
} // namespace mongo
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