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// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
// This source code is licensed under both the GPLv2 (found in the
// COPYING file in the root directory) and Apache 2.0 License
// (found in the LICENSE.Apache file in the root directory).
#include <string>
#include "db/db_test_util.h"
#include "monitoring/thread_status_util.h"
#include "port/stack_trace.h"
#include "rocksdb/statistics.h"
#include "util/random.h"
namespace ROCKSDB_NAMESPACE {
class DBStatisticsTest : public DBTestBase {
public:
DBStatisticsTest()
: DBTestBase("db_statistics_test", /*env_do_fsync=*/true) {}
};
TEST_F(DBStatisticsTest, CompressionStatsTest) {
CompressionType type;
if (Snappy_Supported()) {
type = kSnappyCompression;
fprintf(stderr, "using snappy\n");
} else if (Zlib_Supported()) {
type = kZlibCompression;
fprintf(stderr, "using zlib\n");
} else if (BZip2_Supported()) {
type = kBZip2Compression;
fprintf(stderr, "using bzip2\n");
} else if (LZ4_Supported()) {
type = kLZ4Compression;
fprintf(stderr, "using lz4\n");
} else if (XPRESS_Supported()) {
type = kXpressCompression;
fprintf(stderr, "using xpress\n");
} else if (ZSTD_Supported()) {
type = kZSTD;
fprintf(stderr, "using ZSTD\n");
} else {
fprintf(stderr, "skipping test, compression disabled\n");
return;
}
Options options = CurrentOptions();
options.compression = type;
options.statistics = ROCKSDB_NAMESPACE::CreateDBStatistics();
options.statistics->set_stats_level(StatsLevel::kExceptTimeForMutex);
DestroyAndReopen(options);
int kNumKeysWritten = 100000;
// Check that compressions occur and are counted when compression is turned on
Random rnd(301);
for (int i = 0; i < kNumKeysWritten; ++i) {
// compressible string
ASSERT_OK(Put(Key(i), rnd.RandomString(128) + std::string(128, 'a')));
}
ASSERT_OK(Flush());
ASSERT_GT(options.statistics->getTickerCount(NUMBER_BLOCK_COMPRESSED), 0);
for (int i = 0; i < kNumKeysWritten; ++i) {
auto r = Get(Key(i));
}
ASSERT_GT(options.statistics->getTickerCount(NUMBER_BLOCK_DECOMPRESSED), 0);
options.compression = kNoCompression;
DestroyAndReopen(options);
uint64_t currentCompressions =
options.statistics->getTickerCount(NUMBER_BLOCK_COMPRESSED);
uint64_t currentDecompressions =
options.statistics->getTickerCount(NUMBER_BLOCK_DECOMPRESSED);
// Check that compressions do not occur when turned off
for (int i = 0; i < kNumKeysWritten; ++i) {
// compressible string
ASSERT_OK(Put(Key(i), rnd.RandomString(128) + std::string(128, 'a')));
}
ASSERT_OK(Flush());
ASSERT_EQ(options.statistics->getTickerCount(NUMBER_BLOCK_COMPRESSED) -
currentCompressions,
0);
for (int i = 0; i < kNumKeysWritten; ++i) {
auto r = Get(Key(i));
}
ASSERT_EQ(options.statistics->getTickerCount(NUMBER_BLOCK_DECOMPRESSED) -
currentDecompressions,
0);
}
TEST_F(DBStatisticsTest, MutexWaitStatsDisabledByDefault) {
Options options = CurrentOptions();
options.create_if_missing = true;
options.statistics = ROCKSDB_NAMESPACE::CreateDBStatistics();
CreateAndReopenWithCF({"pikachu"}, options);
const uint64_t kMutexWaitDelay = 100;
ThreadStatusUtil::TEST_SetStateDelay(ThreadStatus::STATE_MUTEX_WAIT,
kMutexWaitDelay);
ASSERT_OK(Put("hello", "rocksdb"));
ASSERT_EQ(TestGetTickerCount(options, DB_MUTEX_WAIT_MICROS), 0);
ThreadStatusUtil::TEST_SetStateDelay(ThreadStatus::STATE_MUTEX_WAIT, 0);
}
TEST_F(DBStatisticsTest, MutexWaitStats) {
Options options = CurrentOptions();
options.create_if_missing = true;
options.statistics = ROCKSDB_NAMESPACE::CreateDBStatistics();
options.statistics->set_stats_level(StatsLevel::kAll);
CreateAndReopenWithCF({"pikachu"}, options);
const uint64_t kMutexWaitDelay = 100;
ThreadStatusUtil::TEST_SetStateDelay(ThreadStatus::STATE_MUTEX_WAIT,
kMutexWaitDelay);
ASSERT_OK(Put("hello", "rocksdb"));
ASSERT_GE(TestGetTickerCount(options, DB_MUTEX_WAIT_MICROS), kMutexWaitDelay);
ThreadStatusUtil::TEST_SetStateDelay(ThreadStatus::STATE_MUTEX_WAIT, 0);
}
TEST_F(DBStatisticsTest, ResetStats) {
Options options = CurrentOptions();
options.create_if_missing = true;
options.statistics = ROCKSDB_NAMESPACE::CreateDBStatistics();
DestroyAndReopen(options);
for (int i = 0; i < 2; ++i) {
// pick arbitrary ticker and histogram. On first iteration they're zero
// because db is unused. On second iteration they're zero due to Reset().
ASSERT_EQ(0, TestGetTickerCount(options, NUMBER_KEYS_WRITTEN));
HistogramData histogram_data;
options.statistics->histogramData(DB_WRITE, &histogram_data);
ASSERT_EQ(0.0, histogram_data.max);
if (i == 0) {
// The Put() makes some of the ticker/histogram stats nonzero until we
// Reset().
ASSERT_OK(Put("hello", "rocksdb"));
ASSERT_EQ(1, TestGetTickerCount(options, NUMBER_KEYS_WRITTEN));
options.statistics->histogramData(DB_WRITE, &histogram_data);
ASSERT_GT(histogram_data.max, 0.0);
ASSERT_OK(options.statistics->Reset());
}
}
}
TEST_F(DBStatisticsTest, ExcludeTickers) {
Options options = CurrentOptions();
options.statistics = ROCKSDB_NAMESPACE::CreateDBStatistics();
DestroyAndReopen(options);
options.statistics->set_stats_level(StatsLevel::kExceptTickers);
ASSERT_OK(Put("foo", "value"));
ASSERT_EQ(0, options.statistics->getTickerCount(BYTES_WRITTEN));
options.statistics->set_stats_level(StatsLevel::kExceptHistogramOrTimers);
Reopen(options);
ASSERT_EQ("value", Get("foo"));
ASSERT_GT(options.statistics->getTickerCount(BYTES_READ), 0);
}
#ifndef ROCKSDB_LITE
TEST_F(DBStatisticsTest, VerifyChecksumReadStat) {
Options options = CurrentOptions();
options.file_checksum_gen_factory = GetFileChecksumGenCrc32cFactory();
options.statistics = ROCKSDB_NAMESPACE::CreateDBStatistics();
Reopen(options);
// Expected to be populated regardless of `PerfLevel` in user thread
SetPerfLevel(kDisable);
{
// Scenario 0: only WAL data. Not verified so require ticker to be zero.
ASSERT_OK(Put("foo", "value"));
ASSERT_OK(db_->VerifyFileChecksums(ReadOptions()));
ASSERT_OK(db_->VerifyChecksum());
ASSERT_EQ(0,
options.statistics->getTickerCount(VERIFY_CHECKSUM_READ_BYTES));
}
// Create one SST.
ASSERT_OK(Flush());
std::unordered_map<std::string, uint64_t> table_files;
uint64_t table_files_size = 0;
GetAllDataFiles(kTableFile, &table_files, &table_files_size);
{
// Scenario 1: Table verified in `VerifyFileChecksums()`. This should read
// the whole file so we require the ticker stat exactly matches the file
// size.
ASSERT_OK(options.statistics->Reset());
ASSERT_OK(db_->VerifyFileChecksums(ReadOptions()));
ASSERT_EQ(table_files_size,
options.statistics->getTickerCount(VERIFY_CHECKSUM_READ_BYTES));
}
{
// Scenario 2: Table verified in `VerifyChecksum()`. This opens a
// `TableReader` to verify each block. It can involve duplicate reads of the
// same data so we set a lower-bound only.
ASSERT_OK(options.statistics->Reset());
ASSERT_OK(db_->VerifyChecksum());
ASSERT_GE(options.statistics->getTickerCount(VERIFY_CHECKSUM_READ_BYTES),
table_files_size);
}
}
#endif // !ROCKSDB_LITE
} // namespace ROCKSDB_NAMESPACE
int main(int argc, char** argv) {
ROCKSDB_NAMESPACE::port::InstallStackTraceHandler();
::testing::InitGoogleTest(&argc, argv);
return RUN_ALL_TESTS();
}
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