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/**
* Copyright (C) 2022-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/db/storage/wiredtiger/wiredtiger_operation_stats.h"
#include "mongo/unittest/temp_dir.h"
#include "mongo/unittest/unittest.h"
namespace mongo {
namespace {
#define ASSERT_WT_OK(result) ASSERT_EQ(result, 0) << wiredtiger_strerror(result)
class WiredTigerOperationStatsTest : public unittest::Test {
protected:
void setUp() override {
ASSERT_WT_OK(
wiredtiger_open(_path.path().c_str(), nullptr, "create,statistics=(fast),", &_conn));
ASSERT_WT_OK(_conn->open_session(_conn, nullptr, "isolation=snapshot", &_session));
ASSERT_WT_OK(_session->create(
_session, _uri.c_str(), "type=file,key_format=q,value_format=u,log=(enabled=false)"));
}
void tearDown() override {
ASSERT_EQ(_conn->close(_conn, nullptr), 0);
}
/**
* Writes the given data using WT. Causes the bytesWritten and timeWritingMicros stats to be
* incremented.
*/
void write(const std::string& data) {
ASSERT_WT_OK(_session->begin_transaction(_session, nullptr));
WT_CURSOR* cursor;
ASSERT_WT_OK(_session->open_cursor(_session, _uri.c_str(), nullptr, nullptr, &cursor));
cursor->set_key(cursor, _key++);
WT_ITEM item{data.data(), data.size()};
cursor->set_value(cursor, &item);
ASSERT_WT_OK(cursor->insert(cursor));
ASSERT_WT_OK(cursor->close(cursor));
ASSERT_WT_OK(_session->commit_transaction(_session, nullptr));
ASSERT_WT_OK(_session->checkpoint(_session, nullptr));
}
/**
* Reads all of the previously written data from WT. Causes the bytesRead and timeReadingMicros
* stats to be incremented.
*/
void read() {
tearDown();
setUp();
ASSERT_WT_OK(_session->begin_transaction(_session, nullptr));
WT_CURSOR* cursor;
ASSERT_WT_OK(_session->open_cursor(_session, _uri.c_str(), nullptr, nullptr, &cursor));
for (int64_t i = 0; i < _key; ++i) {
cursor->set_key(cursor, i);
ASSERT_WT_OK(cursor->search(cursor));
WT_ITEM value;
ASSERT_WT_OK(cursor->get_value(cursor, &value));
}
ASSERT_WT_OK(cursor->close(cursor));
ASSERT_WT_OK(_session->commit_transaction(_session, nullptr));
}
unittest::TempDir _path{"wiredtiger_operation_stats_test"};
std::string _uri{"table:wiredtiger_operation_stats_test"};
WT_CONNECTION* _conn;
WT_SESSION* _session;
int64_t _key = 0;
};
TEST_F(WiredTigerOperationStatsTest, Empty) {
ASSERT_BSONOBJ_EQ(WiredTigerOperationStats{_session}.toBSON(), BSONObj{});
}
TEST_F(WiredTigerOperationStatsTest, Write) {
write("a");
auto statsObj = WiredTigerOperationStats{_session}.toBSON();
auto dataSection = statsObj["data"];
ASSERT_EQ(dataSection.type(), BSONType::Object) << statsObj;
ASSERT(dataSection["bytesWritten"]) << statsObj;
for (auto&& [name, value] : dataSection.Obj()) {
ASSERT_EQ(value.type(), BSONType::NumberLong) << statsObj;
ASSERT_GT(value.numberLong(), 0) << statsObj;
}
}
TEST_F(WiredTigerOperationStatsTest, Read) {
write("a");
read();
auto statsObj = WiredTigerOperationStats{_session}.toBSON();
auto dataSection = statsObj["data"];
ASSERT_EQ(dataSection.type(), BSONType::Object) << statsObj;
ASSERT(dataSection["bytesRead"]) << statsObj;
for (auto&& [name, value] : dataSection.Obj()) {
ASSERT_EQ(value.type(), BSONType::NumberLong) << statsObj;
ASSERT_GT(value.numberLong(), 0) << statsObj;
}
}
TEST_F(WiredTigerOperationStatsTest, Large) {
auto remaining = static_cast<int64_t>(std::numeric_limits<uint32_t>::max()) + 1;
while (remaining > 0) {
std::string data(1024 * 1024, 'a');
remaining -= data.size();
write(data);
}
auto statsObj = WiredTigerOperationStats{_session}.toBSON();
ASSERT_GT(statsObj["data"]["bytesWritten"].numberLong(), std::numeric_limits<uint32_t>::max())
<< statsObj;
read();
statsObj = WiredTigerOperationStats{_session}.toBSON();
ASSERT_GT(statsObj["data"]["bytesRead"].numberLong(), std::numeric_limits<uint32_t>::max())
<< statsObj;
}
TEST_F(WiredTigerOperationStatsTest, Add) {
std::vector<std::unique_ptr<WiredTigerOperationStats>> stats;
write("a");
stats.push_back(std::make_unique<WiredTigerOperationStats>(_session));
read();
stats.push_back(std::make_unique<WiredTigerOperationStats>(_session));
write("aa");
stats.push_back(std::make_unique<WiredTigerOperationStats>(_session));
read();
stats.push_back(std::make_unique<WiredTigerOperationStats>(_session));
long long bytesWritten = 0;
long long timeWritingMicros = 0;
long long bytesRead = 0;
long long timeReadingMicros = 0;
WiredTigerOperationStats combined;
for (auto&& op : stats) {
auto statsObj = op->toBSON();
bytesWritten += statsObj["data"]["bytesWritten"].numberLong();
timeWritingMicros += statsObj["data"]["timeWritingMicros"].numberLong();
bytesRead += statsObj["data"]["bytesRead"].numberLong();
timeReadingMicros += statsObj["data"]["timeReadingMicros"].numberLong();
combined += *op;
}
auto combinedObj = combined.toBSON();
auto dataSection = combinedObj["data"];
ASSERT_EQ(dataSection.type(), BSONType::Object) << combinedObj;
ASSERT_EQ(dataSection["bytesWritten"].numberLong(), bytesWritten) << combinedObj;
ASSERT_EQ(dataSection["timeWritingMicros"].numberLong(), timeWritingMicros) << combinedObj;
ASSERT_EQ(dataSection["bytesRead"].numberLong(), bytesRead) << combinedObj;
ASSERT_EQ(dataSection["timeReadingMicros"].numberLong(), timeReadingMicros) << combinedObj;
}
TEST_F(WiredTigerOperationStatsTest, Clone) {
write("a");
WiredTigerOperationStats stats{_session};
auto clone = stats.clone();
ASSERT_BSONOBJ_EQ(stats.toBSON(), clone->toBSON());
stats += *clone;
ASSERT_BSONOBJ_NE(stats.toBSON(), clone->toBSON());
}
} // namespace
} // namespace mongo
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