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rocksdb/db/db_properties_test.cc

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// Copyright (c) 2016, Facebook, Inc. All rights reserved.
// This source code is licensed under the BSD-style license found in the
// LICENSE file in the root directory of this source tree. An additional grant
// of patent rights can be found in the PATENTS file in the same directory.
//
// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file. See the AUTHORS file for names of contributors.
#include <stdio.h>
#include <algorithm>
#include <string>
#include "db/db_test_util.h"
#include "port/stack_trace.h"
#include "rocksdb/options.h"
#include "rocksdb/perf_context.h"
#include "rocksdb/perf_level.h"
#include "rocksdb/table.h"
#include "util/random.h"
namespace rocksdb {
class DBPropertiesTest : public DBTestBase {
public:
DBPropertiesTest() : DBTestBase("/db_properties_test") {}
};
#ifndef ROCKSDB_LITE
TEST_F(DBPropertiesTest, Empty) {
do {
Options options;
options.env = env_;
options.write_buffer_size = 100000; // Small write buffer
options = CurrentOptions(options);
CreateAndReopenWithCF({"pikachu"}, options);
std::string num;
ASSERT_TRUE(dbfull()->GetProperty(
handles_[1], "rocksdb.num-entries-active-mem-table", &num));
ASSERT_EQ("0", num);
ASSERT_OK(Put(1, "foo", "v1"));
ASSERT_EQ("v1", Get(1, "foo"));
ASSERT_TRUE(dbfull()->GetProperty(
handles_[1], "rocksdb.num-entries-active-mem-table", &num));
ASSERT_EQ("1", num);
// Block sync calls
env_->delay_sstable_sync_.store(true, std::memory_order_release);
Put(1, "k1", std::string(100000, 'x')); // Fill memtable
ASSERT_TRUE(dbfull()->GetProperty(
handles_[1], "rocksdb.num-entries-active-mem-table", &num));
ASSERT_EQ("2", num);
Put(1, "k2", std::string(100000, 'y')); // Trigger compaction
ASSERT_TRUE(dbfull()->GetProperty(
handles_[1], "rocksdb.num-entries-active-mem-table", &num));
ASSERT_EQ("1", num);
ASSERT_EQ("v1", Get(1, "foo"));
// Release sync calls
env_->delay_sstable_sync_.store(false, std::memory_order_release);
ASSERT_OK(db_->DisableFileDeletions());
ASSERT_TRUE(
dbfull()->GetProperty("rocksdb.is-file-deletions-enabled", &num));
ASSERT_EQ("1", num);
ASSERT_OK(db_->DisableFileDeletions());
ASSERT_TRUE(
dbfull()->GetProperty("rocksdb.is-file-deletions-enabled", &num));
ASSERT_EQ("2", num);
ASSERT_OK(db_->DisableFileDeletions());
ASSERT_TRUE(
dbfull()->GetProperty("rocksdb.is-file-deletions-enabled", &num));
ASSERT_EQ("3", num);
ASSERT_OK(db_->EnableFileDeletions(false));
ASSERT_TRUE(
dbfull()->GetProperty("rocksdb.is-file-deletions-enabled", &num));
ASSERT_EQ("2", num);
ASSERT_OK(db_->EnableFileDeletions());
ASSERT_TRUE(
dbfull()->GetProperty("rocksdb.is-file-deletions-enabled", &num));
ASSERT_EQ("0", num);
} while (ChangeOptions());
}
TEST_F(DBPropertiesTest, GetAggregatedIntPropertyTest) {
const int kKeySize = 100;
const int kValueSize = 500;
const int kKeyNum = 100;
Options options;
options.env = env_;
options.create_if_missing = true;
options.write_buffer_size = (kKeySize + kValueSize) * kKeyNum / 10;
// Make them never flush
options.min_write_buffer_number_to_merge = 1000;
options.max_write_buffer_number = 1000;
options = CurrentOptions(options);
CreateAndReopenWithCF({"one", "two", "three", "four"}, options);
Random rnd(301);
for (auto* handle : handles_) {
for (int i = 0; i < kKeyNum; ++i) {
db_->Put(WriteOptions(), handle, RandomString(&rnd, kKeySize),
RandomString(&rnd, kValueSize));
}
}
uint64_t manual_sum = 0;
uint64_t api_sum = 0;
uint64_t value = 0;
for (auto* handle : handles_) {
ASSERT_TRUE(
db_->GetIntProperty(handle, DB::Properties::kSizeAllMemTables, &value));
manual_sum += value;
}
ASSERT_TRUE(db_->GetAggregatedIntProperty(DB::Properties::kSizeAllMemTables,
&api_sum));
ASSERT_GT(manual_sum, 0);
ASSERT_EQ(manual_sum, api_sum);
ASSERT_FALSE(db_->GetAggregatedIntProperty(DB::Properties::kDBStats, &value));
uint64_t before_flush_trm;
uint64_t after_flush_trm;
for (auto* handle : handles_) {
ASSERT_TRUE(db_->GetAggregatedIntProperty(
DB::Properties::kEstimateTableReadersMem, &before_flush_trm));
// Issue flush and expect larger memory usage of table readers.
db_->Flush(FlushOptions(), handle);
ASSERT_TRUE(db_->GetAggregatedIntProperty(
DB::Properties::kEstimateTableReadersMem, &after_flush_trm));
ASSERT_GT(after_flush_trm, before_flush_trm);
}
}
namespace {
void ResetTableProperties(TableProperties* tp) {
tp->data_size = 0;
tp->index_size = 0;
tp->filter_size = 0;
tp->raw_key_size = 0;
tp->raw_value_size = 0;
tp->num_data_blocks = 0;
tp->num_entries = 0;
}
void ParseTablePropertiesString(std::string tp_string, TableProperties* tp) {
double dummy_double;
std::replace(tp_string.begin(), tp_string.end(), ';', ' ');
std::replace(tp_string.begin(), tp_string.end(), '=', ' ');
ResetTableProperties(tp);
sscanf(tp_string.c_str(),
"# data blocks %" SCNu64 " # entries %" SCNu64 " raw key size %" SCNu64
" raw average key size %lf "
" raw value size %" SCNu64
" raw average value size %lf "
" data block size %" SCNu64 " index block size %" SCNu64
" filter block size %" SCNu64,
&tp->num_data_blocks, &tp->num_entries, &tp->raw_key_size,
&dummy_double, &tp->raw_value_size, &dummy_double, &tp->data_size,
&tp->index_size, &tp->filter_size);
}
void VerifySimilar(uint64_t a, uint64_t b, double bias) {
ASSERT_EQ(a == 0U, b == 0U);
if (a == 0) {
return;
}
double dbl_a = static_cast<double>(a);
double dbl_b = static_cast<double>(b);
if (dbl_a > dbl_b) {
ASSERT_LT(static_cast<double>(dbl_a - dbl_b) / (dbl_a + dbl_b), bias);
} else {
ASSERT_LT(static_cast<double>(dbl_b - dbl_a) / (dbl_a + dbl_b), bias);
}
}
void VerifyTableProperties(const TableProperties& base_tp,
const TableProperties& new_tp,
double filter_size_bias = 0.1,
double index_size_bias = 0.1,
double data_size_bias = 0.1,
double num_data_blocks_bias = 0.05) {
VerifySimilar(base_tp.data_size, new_tp.data_size, data_size_bias);
VerifySimilar(base_tp.index_size, new_tp.index_size, index_size_bias);
VerifySimilar(base_tp.filter_size, new_tp.filter_size, filter_size_bias);
VerifySimilar(base_tp.num_data_blocks, new_tp.num_data_blocks,
num_data_blocks_bias);
ASSERT_EQ(base_tp.raw_key_size, new_tp.raw_key_size);
ASSERT_EQ(base_tp.raw_value_size, new_tp.raw_value_size);
ASSERT_EQ(base_tp.num_entries, new_tp.num_entries);
}
void GetExpectedTableProperties(TableProperties* expected_tp,
const int kKeySize, const int kValueSize,
const int kKeysPerTable, const int kTableCount,
const int kBloomBitsPerKey,
const size_t kBlockSize) {
const int kKeyCount = kTableCount * kKeysPerTable;
const int kAvgSuccessorSize = kKeySize / 2;
const int kEncodingSavePerKey = kKeySize / 4;
expected_tp->raw_key_size = kKeyCount * (kKeySize + 8);
expected_tp->raw_value_size = kKeyCount * kValueSize;
expected_tp->num_entries = kKeyCount;
expected_tp->num_data_blocks =
kTableCount *
(kKeysPerTable * (kKeySize - kEncodingSavePerKey + kValueSize)) /
kBlockSize;
expected_tp->data_size =
kTableCount * (kKeysPerTable * (kKeySize + 8 + kValueSize));
expected_tp->index_size =
expected_tp->num_data_blocks * (kAvgSuccessorSize + 12);
expected_tp->filter_size =
kTableCount * (kKeysPerTable * kBloomBitsPerKey / 8);
}
} // anonymous namespace
TEST_F(DBPropertiesTest, AggregatedTableProperties) {
for (int kTableCount = 40; kTableCount <= 100; kTableCount += 30) {
const int kKeysPerTable = 100;
const int kKeySize = 80;
const int kValueSize = 200;
const int kBloomBitsPerKey = 20;
Options options = CurrentOptions();
options.level0_file_num_compaction_trigger = 8;
options.compression = kNoCompression;
options.create_if_missing = true;
BlockBasedTableOptions table_options;
table_options.filter_policy.reset(
NewBloomFilterPolicy(kBloomBitsPerKey, false));
table_options.block_size = 1024;
options.table_factory.reset(new BlockBasedTableFactory(table_options));
DestroyAndReopen(options);
Random rnd(5632);
for (int table = 1; table <= kTableCount; ++table) {
for (int i = 0; i < kKeysPerTable; ++i) {
db_->Put(WriteOptions(), RandomString(&rnd, kKeySize),
RandomString(&rnd, kValueSize));
}
db_->Flush(FlushOptions());
}
std::string property;
db_->GetProperty(DB::Properties::kAggregatedTableProperties, &property);
TableProperties expected_tp;
GetExpectedTableProperties(&expected_tp, kKeySize, kValueSize,
kKeysPerTable, kTableCount, kBloomBitsPerKey,
table_options.block_size);
TableProperties output_tp;
ParseTablePropertiesString(property, &output_tp);
VerifyTableProperties(expected_tp, output_tp);
}
}
TEST_F(DBPropertiesTest, ReadLatencyHistogramByLevel) {
Options options = CurrentOptions();
options.write_buffer_size = 110 << 10;
options.level0_file_num_compaction_trigger = 6;
options.num_levels = 4;
options.compression = kNoCompression;
options.max_bytes_for_level_base = 4500 << 10;
options.target_file_size_base = 98 << 10;
options.max_write_buffer_number = 2;
options.statistics = rocksdb::CreateDBStatistics();
options.max_open_files = 100;
BlockBasedTableOptions table_options;
table_options.no_block_cache = true;
DestroyAndReopen(options);
int key_index = 0;
Random rnd(301);
for (int num = 0; num < 8; num++) {
Put("foo", "bar");
GenerateNewFile(&rnd, &key_index);
dbfull()->TEST_WaitForCompact();
}
dbfull()->TEST_WaitForCompact();
std::string prop;
ASSERT_TRUE(dbfull()->GetProperty("rocksdb.dbstats", &prop));
// Get() after flushes, See latency histogram tracked.
for (int key = 0; key < key_index; key++) {
Get(Key(key));
}
ASSERT_TRUE(dbfull()->GetProperty("rocksdb.dbstats", &prop));
ASSERT_NE(std::string::npos, prop.find("** Level 0 read latency histogram"));
ASSERT_NE(std::string::npos, prop.find("** Level 1 read latency histogram"));
ASSERT_EQ(std::string::npos, prop.find("** Level 2 read latency histogram"));
// Reopen and issue Get(). See thee latency tracked
Reopen(options);
dbfull()->TEST_WaitForCompact();
for (int key = 0; key < key_index; key++) {
Get(Key(key));
}
ASSERT_TRUE(dbfull()->GetProperty("rocksdb.dbstats", &prop));
ASSERT_NE(std::string::npos, prop.find("** Level 0 read latency histogram"));
ASSERT_NE(std::string::npos, prop.find("** Level 1 read latency histogram"));
ASSERT_EQ(std::string::npos, prop.find("** Level 2 read latency histogram"));
// Reopen and issue iterating. See thee latency tracked
Reopen(options);
ASSERT_TRUE(dbfull()->GetProperty("rocksdb.dbstats", &prop));
ASSERT_EQ(std::string::npos, prop.find("** Level 0 read latency histogram"));
ASSERT_EQ(std::string::npos, prop.find("** Level 1 read latency histogram"));
ASSERT_EQ(std::string::npos, prop.find("** Level 2 read latency histogram"));
{
unique_ptr<Iterator> iter(db_->NewIterator(ReadOptions()));
for (iter->Seek(Key(0)); iter->Valid(); iter->Next()) {
}
}
ASSERT_TRUE(dbfull()->GetProperty("rocksdb.dbstats", &prop));
ASSERT_NE(std::string::npos, prop.find("** Level 0 read latency histogram"));
ASSERT_NE(std::string::npos, prop.find("** Level 1 read latency histogram"));
ASSERT_EQ(std::string::npos, prop.find("** Level 2 read latency histogram"));
// options.max_open_files preloads table readers.
options.max_open_files = -1;
Reopen(options);
ASSERT_TRUE(dbfull()->GetProperty("rocksdb.dbstats", &prop));
ASSERT_NE(std::string::npos, prop.find("** Level 0 read latency histogram"));
ASSERT_NE(std::string::npos, prop.find("** Level 1 read latency histogram"));
ASSERT_EQ(std::string::npos, prop.find("** Level 2 read latency histogram"));
for (int key = 0; key < key_index; key++) {
Get(Key(key));
}
ASSERT_TRUE(dbfull()->GetProperty("rocksdb.dbstats", &prop));
ASSERT_NE(std::string::npos, prop.find("** Level 0 read latency histogram"));
ASSERT_NE(std::string::npos, prop.find("** Level 1 read latency histogram"));
ASSERT_EQ(std::string::npos, prop.find("** Level 2 read latency histogram"));
}
TEST_F(DBPropertiesTest, AggregatedTablePropertiesAtLevel) {
const int kTableCount = 100;
const int kKeysPerTable = 10;
const int kKeySize = 50;
const int kValueSize = 400;
const int kMaxLevel = 7;
const int kBloomBitsPerKey = 20;
Random rnd(301);
Options options = CurrentOptions();
options.level0_file_num_compaction_trigger = 8;
options.compression = kNoCompression;
options.create_if_missing = true;
options.level0_file_num_compaction_trigger = 2;
options.target_file_size_base = 8192;
options.max_bytes_for_level_base = 10000;
options.max_bytes_for_level_multiplier = 2;
// This ensures there no compaction happening when we call GetProperty().
options.disable_auto_compactions = true;
BlockBasedTableOptions table_options;
table_options.filter_policy.reset(
NewBloomFilterPolicy(kBloomBitsPerKey, false));
table_options.block_size = 1024;
options.table_factory.reset(new BlockBasedTableFactory(table_options));
DestroyAndReopen(options);
std::string level_tp_strings[kMaxLevel];
std::string tp_string;
TableProperties level_tps[kMaxLevel];
TableProperties tp, sum_tp, expected_tp;
for (int table = 1; table <= kTableCount; ++table) {
for (int i = 0; i < kKeysPerTable; ++i) {
db_->Put(WriteOptions(), RandomString(&rnd, kKeySize),
RandomString(&rnd, kValueSize));
}
db_->Flush(FlushOptions());
db_->CompactRange(CompactRangeOptions(), nullptr, nullptr);
ResetTableProperties(&sum_tp);
for (int level = 0; level < kMaxLevel; ++level) {
db_->GetProperty(
DB::Properties::kAggregatedTablePropertiesAtLevel + ToString(level),
&level_tp_strings[level]);
ParseTablePropertiesString(level_tp_strings[level], &level_tps[level]);
sum_tp.data_size += level_tps[level].data_size;
sum_tp.index_size += level_tps[level].index_size;
sum_tp.filter_size += level_tps[level].filter_size;
sum_tp.raw_key_size += level_tps[level].raw_key_size;
sum_tp.raw_value_size += level_tps[level].raw_value_size;
sum_tp.num_data_blocks += level_tps[level].num_data_blocks;
sum_tp.num_entries += level_tps[level].num_entries;
}
db_->GetProperty(DB::Properties::kAggregatedTableProperties, &tp_string);
ParseTablePropertiesString(tp_string, &tp);
ASSERT_EQ(sum_tp.data_size, tp.data_size);
ASSERT_EQ(sum_tp.index_size, tp.index_size);
ASSERT_EQ(sum_tp.filter_size, tp.filter_size);
ASSERT_EQ(sum_tp.raw_key_size, tp.raw_key_size);
ASSERT_EQ(sum_tp.raw_value_size, tp.raw_value_size);
ASSERT_EQ(sum_tp.num_data_blocks, tp.num_data_blocks);
ASSERT_EQ(sum_tp.num_entries, tp.num_entries);
if (table > 3) {
GetExpectedTableProperties(&expected_tp, kKeySize, kValueSize,
kKeysPerTable, table, kBloomBitsPerKey,
table_options.block_size);
// Gives larger bias here as index block size, filter block size,
// and data block size become much harder to estimate in this test.
VerifyTableProperties(tp, expected_tp, 0.5, 0.4, 0.4, 0.25);
}
}
}
TEST_F(DBPropertiesTest, NumImmutableMemTable) {
do {
Options options = CurrentOptions();
WriteOptions writeOpt = WriteOptions();
writeOpt.disableWAL = true;
options.max_write_buffer_number = 4;
options.min_write_buffer_number_to_merge = 3;
options.max_write_buffer_number_to_maintain = 4;
options.write_buffer_size = 1000000;
CreateAndReopenWithCF({"pikachu"}, options);
std::string big_value(1000000 * 2, 'x');
std::string num;
SetPerfLevel(kEnableTime);
ASSERT_TRUE(GetPerfLevel() == kEnableTime);
ASSERT_OK(dbfull()->Put(writeOpt, handles_[1], "k1", big_value));
ASSERT_TRUE(dbfull()->GetProperty(handles_[1],
"rocksdb.num-immutable-mem-table", &num));
ASSERT_EQ(num, "0");
ASSERT_TRUE(dbfull()->GetProperty(
handles_[1], DB::Properties::kNumImmutableMemTableFlushed, &num));
ASSERT_EQ(num, "0");
ASSERT_TRUE(dbfull()->GetProperty(
handles_[1], "rocksdb.num-entries-active-mem-table", &num));
ASSERT_EQ(num, "1");
perf_context.Reset();
Get(1, "k1");
ASSERT_EQ(1, static_cast<int>(perf_context.get_from_memtable_count));
ASSERT_OK(dbfull()->Put(writeOpt, handles_[1], "k2", big_value));
ASSERT_TRUE(dbfull()->GetProperty(handles_[1],
"rocksdb.num-immutable-mem-table", &num));
ASSERT_EQ(num, "1");
ASSERT_TRUE(dbfull()->GetProperty(
handles_[1], "rocksdb.num-entries-active-mem-table", &num));
ASSERT_EQ(num, "1");
ASSERT_TRUE(dbfull()->GetProperty(
handles_[1], "rocksdb.num-entries-imm-mem-tables", &num));
ASSERT_EQ(num, "1");
perf_context.Reset();
Get(1, "k1");
ASSERT_EQ(2, static_cast<int>(perf_context.get_from_memtable_count));
perf_context.Reset();
Get(1, "k2");
ASSERT_EQ(1, static_cast<int>(perf_context.get_from_memtable_count));
ASSERT_OK(dbfull()->Put(writeOpt, handles_[1], "k3", big_value));
ASSERT_TRUE(dbfull()->GetProperty(
handles_[1], "rocksdb.cur-size-active-mem-table", &num));
ASSERT_TRUE(dbfull()->GetProperty(handles_[1],
"rocksdb.num-immutable-mem-table", &num));
ASSERT_EQ(num, "2");
ASSERT_TRUE(dbfull()->GetProperty(
handles_[1], "rocksdb.num-entries-active-mem-table", &num));
ASSERT_EQ(num, "1");
ASSERT_TRUE(dbfull()->GetProperty(
handles_[1], "rocksdb.num-entries-imm-mem-tables", &num));
ASSERT_EQ(num, "2");
perf_context.Reset();
Get(1, "k2");
ASSERT_EQ(2, static_cast<int>(perf_context.get_from_memtable_count));
perf_context.Reset();
Get(1, "k3");
ASSERT_EQ(1, static_cast<int>(perf_context.get_from_memtable_count));
perf_context.Reset();
Get(1, "k1");
ASSERT_EQ(3, static_cast<int>(perf_context.get_from_memtable_count));
ASSERT_OK(Flush(1));
ASSERT_TRUE(dbfull()->GetProperty(handles_[1],
"rocksdb.num-immutable-mem-table", &num));
ASSERT_EQ(num, "0");
ASSERT_TRUE(dbfull()->GetProperty(
handles_[1], DB::Properties::kNumImmutableMemTableFlushed, &num));
ASSERT_EQ(num, "3");
ASSERT_TRUE(dbfull()->GetProperty(
handles_[1], "rocksdb.cur-size-active-mem-table", &num));
// "192" is the size of the metadata of an empty skiplist, this would
// break if we change the default skiplist implementation
ASSERT_EQ(num, "192");
uint64_t int_num;
uint64_t base_total_size;
ASSERT_TRUE(dbfull()->GetIntProperty(
handles_[1], "rocksdb.estimate-num-keys", &base_total_size));
ASSERT_OK(dbfull()->Delete(writeOpt, handles_[1], "k2"));
ASSERT_OK(dbfull()->Put(writeOpt, handles_[1], "k3", ""));
ASSERT_OK(dbfull()->Delete(writeOpt, handles_[1], "k3"));
ASSERT_TRUE(dbfull()->GetIntProperty(
handles_[1], "rocksdb.num-deletes-active-mem-table", &int_num));
ASSERT_EQ(int_num, 2U);
ASSERT_TRUE(dbfull()->GetIntProperty(
handles_[1], "rocksdb.num-entries-active-mem-table", &int_num));
ASSERT_EQ(int_num, 3U);
ASSERT_OK(dbfull()->Put(writeOpt, handles_[1], "k2", big_value));
ASSERT_OK(dbfull()->Put(writeOpt, handles_[1], "k2", big_value));
ASSERT_TRUE(dbfull()->GetIntProperty(
handles_[1], "rocksdb.num-entries-imm-mem-tables", &int_num));
ASSERT_EQ(int_num, 4U);
ASSERT_TRUE(dbfull()->GetIntProperty(
handles_[1], "rocksdb.num-deletes-imm-mem-tables", &int_num));
ASSERT_EQ(int_num, 2U);
ASSERT_TRUE(dbfull()->GetIntProperty(
handles_[1], "rocksdb.estimate-num-keys", &int_num));
ASSERT_EQ(int_num, base_total_size + 1);
SetPerfLevel(kDisable);
ASSERT_TRUE(GetPerfLevel() == kDisable);
} while (ChangeCompactOptions());
}
TEST_F(DBPropertiesTest, GetProperty) {
// Set sizes to both background thread pool to be 1 and block them.
env_->SetBackgroundThreads(1, Env::HIGH);
env_->SetBackgroundThreads(1, Env::LOW);
test::SleepingBackgroundTask sleeping_task_low;
env_->Schedule(&test::SleepingBackgroundTask::DoSleepTask, &sleeping_task_low,
Env::Priority::LOW);
test::SleepingBackgroundTask sleeping_task_high;
env_->Schedule(&test::SleepingBackgroundTask::DoSleepTask,
&sleeping_task_high, Env::Priority::HIGH);
Options options = CurrentOptions();
WriteOptions writeOpt = WriteOptions();
writeOpt.disableWAL = true;
options.compaction_style = kCompactionStyleUniversal;
options.level0_file_num_compaction_trigger = 1;
options.compaction_options_universal.size_ratio = 50;
options.max_background_compactions = 1;
options.max_background_flushes = 1;
options.max_write_buffer_number = 10;
options.min_write_buffer_number_to_merge = 1;
options.max_write_buffer_number_to_maintain = 0;
options.write_buffer_size = 1000000;
Reopen(options);
std::string big_value(1000000 * 2, 'x');
std::string num;
uint64_t int_num;
SetPerfLevel(kEnableTime);
ASSERT_TRUE(
dbfull()->GetIntProperty("rocksdb.estimate-table-readers-mem", &int_num));
ASSERT_EQ(int_num, 0U);
ASSERT_TRUE(
dbfull()->GetIntProperty("rocksdb.estimate-live-data-size", &int_num));
ASSERT_EQ(int_num, 0U);
ASSERT_OK(dbfull()->Put(writeOpt, "k1", big_value));
ASSERT_TRUE(dbfull()->GetProperty("rocksdb.num-immutable-mem-table", &num));
ASSERT_EQ(num, "0");
ASSERT_TRUE(dbfull()->GetProperty("rocksdb.mem-table-flush-pending", &num));
ASSERT_EQ(num, "0");
ASSERT_TRUE(dbfull()->GetProperty("rocksdb.compaction-pending", &num));
ASSERT_EQ(num, "0");
ASSERT_TRUE(dbfull()->GetProperty("rocksdb.estimate-num-keys", &num));
ASSERT_EQ(num, "1");
perf_context.Reset();
ASSERT_OK(dbfull()->Put(writeOpt, "k2", big_value));
ASSERT_TRUE(dbfull()->GetProperty("rocksdb.num-immutable-mem-table", &num));
ASSERT_EQ(num, "1");
ASSERT_OK(dbfull()->Delete(writeOpt, "k-non-existing"));
ASSERT_OK(dbfull()->Put(writeOpt, "k3", big_value));
ASSERT_TRUE(dbfull()->GetProperty("rocksdb.num-immutable-mem-table", &num));
ASSERT_EQ(num, "2");
ASSERT_TRUE(dbfull()->GetProperty("rocksdb.mem-table-flush-pending", &num));
ASSERT_EQ(num, "1");
ASSERT_TRUE(dbfull()->GetProperty("rocksdb.compaction-pending", &num));
ASSERT_EQ(num, "0");
ASSERT_TRUE(dbfull()->GetProperty("rocksdb.estimate-num-keys", &num));
ASSERT_EQ(num, "2");
// Verify the same set of properties through GetIntProperty
ASSERT_TRUE(
dbfull()->GetIntProperty("rocksdb.num-immutable-mem-table", &int_num));
ASSERT_EQ(int_num, 2U);
ASSERT_TRUE(
dbfull()->GetIntProperty("rocksdb.mem-table-flush-pending", &int_num));
ASSERT_EQ(int_num, 1U);
ASSERT_TRUE(dbfull()->GetIntProperty("rocksdb.compaction-pending", &int_num));
ASSERT_EQ(int_num, 0U);
ASSERT_TRUE(dbfull()->GetIntProperty("rocksdb.estimate-num-keys", &int_num));
ASSERT_EQ(int_num, 2U);
ASSERT_TRUE(
dbfull()->GetIntProperty("rocksdb.estimate-table-readers-mem", &int_num));
ASSERT_EQ(int_num, 0U);
sleeping_task_high.WakeUp();
sleeping_task_high.WaitUntilDone();
dbfull()->TEST_WaitForFlushMemTable();
ASSERT_OK(dbfull()->Put(writeOpt, "k4", big_value));
ASSERT_OK(dbfull()->Put(writeOpt, "k5", big_value));
dbfull()->TEST_WaitForFlushMemTable();
ASSERT_TRUE(dbfull()->GetProperty("rocksdb.mem-table-flush-pending", &num));
ASSERT_EQ(num, "0");
ASSERT_TRUE(dbfull()->GetProperty("rocksdb.compaction-pending", &num));
ASSERT_EQ(num, "1");
ASSERT_TRUE(dbfull()->GetProperty("rocksdb.estimate-num-keys", &num));
ASSERT_EQ(num, "4");
ASSERT_TRUE(
dbfull()->GetIntProperty("rocksdb.estimate-table-readers-mem", &int_num));
ASSERT_GT(int_num, 0U);
sleeping_task_low.WakeUp();
sleeping_task_low.WaitUntilDone();
// Wait for compaction to be done. This is important because otherwise RocksDB
// might schedule a compaction when reopening the database, failing assertion
// (A) as a result.
dbfull()->TEST_WaitForCompact();
options.max_open_files = 10;
Reopen(options);
// After reopening, no table reader is loaded, so no memory for table readers
ASSERT_TRUE(
dbfull()->GetIntProperty("rocksdb.estimate-table-readers-mem", &int_num));
ASSERT_EQ(int_num, 0U); // (A)
ASSERT_TRUE(dbfull()->GetIntProperty("rocksdb.estimate-num-keys", &int_num));
ASSERT_GT(int_num, 0U);
// After reading a key, at least one table reader is loaded.
Get("k5");
ASSERT_TRUE(
dbfull()->GetIntProperty("rocksdb.estimate-table-readers-mem", &int_num));
ASSERT_GT(int_num, 0U);
// Test rocksdb.num-live-versions
{
options.level0_file_num_compaction_trigger = 20;
Reopen(options);
ASSERT_TRUE(
dbfull()->GetIntProperty("rocksdb.num-live-versions", &int_num));
ASSERT_EQ(int_num, 1U);
// Use an iterator to hold current version
std::unique_ptr<Iterator> iter1(dbfull()->NewIterator(ReadOptions()));
ASSERT_OK(dbfull()->Put(writeOpt, "k6", big_value));
Flush();
ASSERT_TRUE(
dbfull()->GetIntProperty("rocksdb.num-live-versions", &int_num));
ASSERT_EQ(int_num, 2U);
// Use an iterator to hold current version
std::unique_ptr<Iterator> iter2(dbfull()->NewIterator(ReadOptions()));
ASSERT_OK(dbfull()->Put(writeOpt, "k7", big_value));
Flush();
ASSERT_TRUE(
dbfull()->GetIntProperty("rocksdb.num-live-versions", &int_num));
ASSERT_EQ(int_num, 3U);
iter2.reset();
ASSERT_TRUE(
dbfull()->GetIntProperty("rocksdb.num-live-versions", &int_num));
ASSERT_EQ(int_num, 2U);
iter1.reset();
ASSERT_TRUE(
dbfull()->GetIntProperty("rocksdb.num-live-versions", &int_num));
ASSERT_EQ(int_num, 1U);
}
}
TEST_F(DBPropertiesTest, ApproximateMemoryUsage) {
const int kNumRounds = 10;
// TODO(noetzli) kFlushesPerRound does not really correlate with how many
// flushes happen.
const int kFlushesPerRound = 10;
const int kWritesPerFlush = 10;
const int kKeySize = 100;
const int kValueSize = 1000;
Options options;
options.write_buffer_size = 1000; // small write buffer
options.min_write_buffer_number_to_merge = 4;
options.compression = kNoCompression;
options.create_if_missing = true;
options = CurrentOptions(options);
DestroyAndReopen(options);
Random rnd(301);
std::vector<Iterator*> iters;
uint64_t active_mem;
uint64_t unflushed_mem;
uint64_t all_mem;
uint64_t prev_all_mem;
// Phase 0. The verify the initial value of all these properties are the same
// as we have no mem-tables.
dbfull()->GetIntProperty("rocksdb.cur-size-active-mem-table", &active_mem);
dbfull()->GetIntProperty("rocksdb.cur-size-all-mem-tables", &unflushed_mem);
dbfull()->GetIntProperty("rocksdb.size-all-mem-tables", &all_mem);
ASSERT_EQ(all_mem, active_mem);
ASSERT_EQ(all_mem, unflushed_mem);
// Phase 1. Simply issue Put() and expect "cur-size-all-mem-tables" equals to
// "size-all-mem-tables"
for (int r = 0; r < kNumRounds; ++r) {
for (int f = 0; f < kFlushesPerRound; ++f) {
for (int w = 0; w < kWritesPerFlush; ++w) {
Put(RandomString(&rnd, kKeySize), RandomString(&rnd, kValueSize));
}
}
// Make sure that there is no flush between getting the two properties.
dbfull()->TEST_WaitForFlushMemTable();
dbfull()->GetIntProperty("rocksdb.cur-size-all-mem-tables", &unflushed_mem);
dbfull()->GetIntProperty("rocksdb.size-all-mem-tables", &all_mem);
// in no iterator case, these two number should be the same.
ASSERT_EQ(unflushed_mem, all_mem);
}
prev_all_mem = all_mem;
// Phase 2. Keep issuing Put() but also create new iterators. This time we
// expect "size-all-mem-tables" > "cur-size-all-mem-tables".
for (int r = 0; r < kNumRounds; ++r) {
iters.push_back(db_->NewIterator(ReadOptions()));
for (int f = 0; f < kFlushesPerRound; ++f) {
for (int w = 0; w < kWritesPerFlush; ++w) {
Put(RandomString(&rnd, kKeySize), RandomString(&rnd, kValueSize));
}
}
// Force flush to prevent flush from happening between getting the
// properties or after getting the properties and before the new round.
Flush();
// In the second round, add iterators.
dbfull()->GetIntProperty("rocksdb.cur-size-active-mem-table", &active_mem);
dbfull()->GetIntProperty("rocksdb.cur-size-all-mem-tables", &unflushed_mem);
dbfull()->GetIntProperty("rocksdb.size-all-mem-tables", &all_mem);
ASSERT_GT(all_mem, active_mem);
ASSERT_GT(all_mem, unflushed_mem);
ASSERT_GT(all_mem, prev_all_mem);
prev_all_mem = all_mem;
}
// Phase 3. Delete iterators and expect "size-all-mem-tables" shrinks
// whenever we release an iterator.
for (auto* iter : iters) {
delete iter;
dbfull()->GetIntProperty("rocksdb.size-all-mem-tables", &all_mem);
// Expect the size shrinking
ASSERT_LT(all_mem, prev_all_mem);
prev_all_mem = all_mem;
}
// Expect all these three counters to be the same.
dbfull()->GetIntProperty("rocksdb.cur-size-active-mem-table", &active_mem);
dbfull()->GetIntProperty("rocksdb.cur-size-all-mem-tables", &unflushed_mem);
dbfull()->GetIntProperty("rocksdb.size-all-mem-tables", &all_mem);
ASSERT_EQ(active_mem, unflushed_mem);
ASSERT_EQ(unflushed_mem, all_mem);
// Phase 5. Reopen, and expect all these three counters to be the same again.
Reopen(options);
dbfull()->GetIntProperty("rocksdb.cur-size-active-mem-table", &active_mem);
dbfull()->GetIntProperty("rocksdb.cur-size-all-mem-tables", &unflushed_mem);
dbfull()->GetIntProperty("rocksdb.size-all-mem-tables", &all_mem);
ASSERT_EQ(active_mem, unflushed_mem);
ASSERT_EQ(unflushed_mem, all_mem);
}
TEST_F(DBPropertiesTest, EstimatePendingCompBytes) {
// Set sizes to both background thread pool to be 1 and block them.
env_->SetBackgroundThreads(1, Env::HIGH);
env_->SetBackgroundThreads(1, Env::LOW);
test::SleepingBackgroundTask sleeping_task_low;
env_->Schedule(&test::SleepingBackgroundTask::DoSleepTask, &sleeping_task_low,
Env::Priority::LOW);
Options options = CurrentOptions();
WriteOptions writeOpt = WriteOptions();
writeOpt.disableWAL = true;
options.compaction_style = kCompactionStyleLevel;
options.level0_file_num_compaction_trigger = 2;
options.max_background_compactions = 1;
options.max_background_flushes = 1;
options.max_write_buffer_number = 10;
options.min_write_buffer_number_to_merge = 1;
options.max_write_buffer_number_to_maintain = 0;
options.write_buffer_size = 1000000;
Reopen(options);
std::string big_value(1000000 * 2, 'x');
std::string num;
uint64_t int_num;
ASSERT_OK(dbfull()->Put(writeOpt, "k1", big_value));
Flush();
ASSERT_TRUE(dbfull()->GetIntProperty(
"rocksdb.estimate-pending-compaction-bytes", &int_num));
ASSERT_EQ(int_num, 0U);
ASSERT_OK(dbfull()->Put(writeOpt, "k2", big_value));
Flush();
ASSERT_TRUE(dbfull()->GetIntProperty(
"rocksdb.estimate-pending-compaction-bytes", &int_num));
ASSERT_EQ(int_num, 0U);
ASSERT_OK(dbfull()->Put(writeOpt, "k3", big_value));
Flush();
ASSERT_TRUE(dbfull()->GetIntProperty(
"rocksdb.estimate-pending-compaction-bytes", &int_num));
ASSERT_GT(int_num, 0U);
sleeping_task_low.WakeUp();
sleeping_task_low.WaitUntilDone();
dbfull()->TEST_WaitForCompact();
ASSERT_TRUE(dbfull()->GetIntProperty(
"rocksdb.estimate-pending-compaction-bytes", &int_num));
ASSERT_EQ(int_num, 0U);
}
#endif // ROCKSDB_LITE
class CountingUserTblPropCollector : public TablePropertiesCollector {
public:
const char* Name() const override { return "CountingUserTblPropCollector"; }
Status Finish(UserCollectedProperties* properties) override {
std::string encoded;
PutVarint32(&encoded, count_);
*properties = UserCollectedProperties{
{"CountingUserTblPropCollector", message_}, {"Count", encoded},
};
return Status::OK();
}
Status AddUserKey(const Slice& user_key, const Slice& value, EntryType type,
SequenceNumber seq, uint64_t file_size) override {
++count_;
return Status::OK();
}
virtual UserCollectedProperties GetReadableProperties() const override {
return UserCollectedProperties{};
}
private:
std::string message_ = "Rocksdb";
uint32_t count_ = 0;
};
class CountingUserTblPropCollectorFactory
: public TablePropertiesCollectorFactory {
public:
explicit CountingUserTblPropCollectorFactory(
uint32_t expected_column_family_id)
: expected_column_family_id_(expected_column_family_id),
num_created_(0) {}
virtual TablePropertiesCollector* CreateTablePropertiesCollector(
TablePropertiesCollectorFactory::Context context) override {
EXPECT_EQ(expected_column_family_id_, context.column_family_id);
num_created_++;
return new CountingUserTblPropCollector();
}
const char* Name() const override {
return "CountingUserTblPropCollectorFactory";
}
void set_expected_column_family_id(uint32_t v) {
expected_column_family_id_ = v;
}
uint32_t expected_column_family_id_;
uint32_t num_created_;
};
class CountingDeleteTabPropCollector : public TablePropertiesCollector {
public:
const char* Name() const override { return "CountingDeleteTabPropCollector"; }
Status AddUserKey(const Slice& user_key, const Slice& value, EntryType type,
SequenceNumber seq, uint64_t file_size) override {
if (type == kEntryDelete) {
num_deletes_++;
}
return Status::OK();
}
bool NeedCompact() const override { return num_deletes_ > 10; }
UserCollectedProperties GetReadableProperties() const override {
return UserCollectedProperties{};
}
Status Finish(UserCollectedProperties* properties) override {
*properties =
UserCollectedProperties{{"num_delete", ToString(num_deletes_)}};
return Status::OK();
}
private:
uint32_t num_deletes_ = 0;
};
class CountingDeleteTabPropCollectorFactory
: public TablePropertiesCollectorFactory {
public:
virtual TablePropertiesCollector* CreateTablePropertiesCollector(
TablePropertiesCollectorFactory::Context context) override {
return new CountingDeleteTabPropCollector();
}
const char* Name() const override {
return "CountingDeleteTabPropCollectorFactory";
}
};
#ifndef ROCKSDB_LITE
TEST_F(DBPropertiesTest, GetUserDefinedTableProperties) {
Options options = CurrentOptions();
options.level0_file_num_compaction_trigger = (1 << 30);
options.max_background_flushes = 0;
options.table_properties_collector_factories.resize(1);
std::shared_ptr<CountingUserTblPropCollectorFactory> collector_factory =
std::make_shared<CountingUserTblPropCollectorFactory>(0);
options.table_properties_collector_factories[0] = collector_factory;
Reopen(options);
// Create 4 tables
for (int table = 0; table < 4; ++table) {
for (int i = 0; i < 10 + table; ++i) {
db_->Put(WriteOptions(), ToString(table * 100 + i), "val");
}
db_->Flush(FlushOptions());
}
TablePropertiesCollection props;
ASSERT_OK(db_->GetPropertiesOfAllTables(&props));
ASSERT_EQ(4U, props.size());
uint32_t sum = 0;
for (const auto& item : props) {
auto& user_collected = item.second->user_collected_properties;
ASSERT_TRUE(user_collected.find("CountingUserTblPropCollector") !=
user_collected.end());
ASSERT_EQ(user_collected.at("CountingUserTblPropCollector"), "Rocksdb");
ASSERT_TRUE(user_collected.find("Count") != user_collected.end());
Slice key(user_collected.at("Count"));
uint32_t count;
ASSERT_TRUE(GetVarint32(&key, &count));
sum += count;
}
ASSERT_EQ(10u + 11u + 12u + 13u, sum);
ASSERT_GT(collector_factory->num_created_, 0U);
collector_factory->num_created_ = 0;
dbfull()->TEST_CompactRange(0, nullptr, nullptr);
ASSERT_GT(collector_factory->num_created_, 0U);
}
#endif // ROCKSDB_LITE
TEST_F(DBPropertiesTest, UserDefinedTablePropertiesContext) {
Options options = CurrentOptions();
options.level0_file_num_compaction_trigger = 3;
options.max_background_flushes = 0;
options.table_properties_collector_factories.resize(1);
std::shared_ptr<CountingUserTblPropCollectorFactory> collector_factory =
std::make_shared<CountingUserTblPropCollectorFactory>(1);
options.table_properties_collector_factories[0] = collector_factory,
CreateAndReopenWithCF({"pikachu"}, options);
// Create 2 files
for (int table = 0; table < 2; ++table) {
for (int i = 0; i < 10 + table; ++i) {
Put(1, ToString(table * 100 + i), "val");
}
Flush(1);
}
ASSERT_GT(collector_factory->num_created_, 0U);
collector_factory->num_created_ = 0;
// Trigger automatic compactions.
for (int table = 0; table < 3; ++table) {
for (int i = 0; i < 10 + table; ++i) {
Put(1, ToString(table * 100 + i), "val");
}
Flush(1);
dbfull()->TEST_WaitForCompact();
}
ASSERT_GT(collector_factory->num_created_, 0U);
collector_factory->num_created_ = 0;
dbfull()->TEST_CompactRange(0, nullptr, nullptr, handles_[1]);
ASSERT_GT(collector_factory->num_created_, 0U);
// Come back to write to default column family
collector_factory->num_created_ = 0;
collector_factory->set_expected_column_family_id(0); // default CF
// Create 4 tables in default column family
for (int table = 0; table < 2; ++table) {
for (int i = 0; i < 10 + table; ++i) {
Put(ToString(table * 100 + i), "val");
}
Flush();
}
ASSERT_GT(collector_factory->num_created_, 0U);
collector_factory->num_created_ = 0;
// Trigger automatic compactions.
for (int table = 0; table < 3; ++table) {
for (int i = 0; i < 10 + table; ++i) {
Put(ToString(table * 100 + i), "val");
}
Flush();
dbfull()->TEST_WaitForCompact();
}
ASSERT_GT(collector_factory->num_created_, 0U);
collector_factory->num_created_ = 0;
dbfull()->TEST_CompactRange(0, nullptr, nullptr);
ASSERT_GT(collector_factory->num_created_, 0U);
}
#ifndef ROCKSDB_LITE
TEST_F(DBPropertiesTest, TablePropertiesNeedCompactTest) {
Random rnd(301);
Options options;
options.create_if_missing = true;
options.write_buffer_size = 4096;
options.max_write_buffer_number = 8;
options.level0_file_num_compaction_trigger = 2;
options.level0_slowdown_writes_trigger = 2;
options.level0_stop_writes_trigger = 4;
options.target_file_size_base = 2048;
options.max_bytes_for_level_base = 10240;
options.max_bytes_for_level_multiplier = 4;
options.soft_pending_compaction_bytes_limit = 1024 * 1024;
options.num_levels = 8;
std::shared_ptr<TablePropertiesCollectorFactory> collector_factory =
std::make_shared<CountingDeleteTabPropCollectorFactory>();
options.table_properties_collector_factories.resize(1);
options.table_properties_collector_factories[0] = collector_factory;
DestroyAndReopen(options);
const int kMaxKey = 1000;
for (int i = 0; i < kMaxKey; i++) {
ASSERT_OK(Put(Key(i), RandomString(&rnd, 102)));
ASSERT_OK(Put(Key(kMaxKey + i), RandomString(&rnd, 102)));
}
Flush();
dbfull()->TEST_WaitForCompact();
if (NumTableFilesAtLevel(0) == 1) {
// Clear Level 0 so that when later flush a file with deletions,
// we don't trigger an organic compaction.
ASSERT_OK(Put(Key(0), ""));
ASSERT_OK(Put(Key(kMaxKey * 2), ""));
Flush();
dbfull()->TEST_WaitForCompact();
}
ASSERT_EQ(NumTableFilesAtLevel(0), 0);
{
int c = 0;
std::unique_ptr<Iterator> iter(db_->NewIterator(ReadOptions()));
iter->Seek(Key(kMaxKey - 100));
while (iter->Valid() && iter->key().compare(Key(kMaxKey + 100)) < 0) {
iter->Next();
++c;
}
ASSERT_EQ(c, 200);
}
Delete(Key(0));
for (int i = kMaxKey - 100; i < kMaxKey + 100; i++) {
Delete(Key(i));
}
Delete(Key(kMaxKey * 2));
Flush();
dbfull()->TEST_WaitForCompact();
{
SetPerfLevel(kEnableCount);
perf_context.Reset();
int c = 0;
std::unique_ptr<Iterator> iter(db_->NewIterator(ReadOptions()));
iter->Seek(Key(kMaxKey - 100));
while (iter->Valid() && iter->key().compare(Key(kMaxKey + 100)) < 0) {
iter->Next();
}
ASSERT_EQ(c, 0);
ASSERT_LT(perf_context.internal_delete_skipped_count, 30u);
ASSERT_LT(perf_context.internal_key_skipped_count, 30u);
SetPerfLevel(kDisable);
}
}
TEST_F(DBPropertiesTest, NeedCompactHintPersistentTest) {
Random rnd(301);
Options options;
options.create_if_missing = true;
options.max_write_buffer_number = 8;
options.level0_file_num_compaction_trigger = 10;
options.level0_slowdown_writes_trigger = 10;
options.level0_stop_writes_trigger = 10;
options.disable_auto_compactions = true;
std::shared_ptr<TablePropertiesCollectorFactory> collector_factory =
std::make_shared<CountingDeleteTabPropCollectorFactory>();
options.table_properties_collector_factories.resize(1);
options.table_properties_collector_factories[0] = collector_factory;
DestroyAndReopen(options);
const int kMaxKey = 100;
for (int i = 0; i < kMaxKey; i++) {
ASSERT_OK(Put(Key(i), ""));
}
Flush();
dbfull()->TEST_WaitForFlushMemTable();
for (int i = 1; i < kMaxKey - 1; i++) {
Delete(Key(i));
}
Flush();
dbfull()->TEST_WaitForFlushMemTable();
ASSERT_EQ(NumTableFilesAtLevel(0), 2);
// Restart the DB. Although number of files didn't reach
// options.level0_file_num_compaction_trigger, compaction should
// still be triggered because of the need-compaction hint.
options.disable_auto_compactions = false;
Reopen(options);
dbfull()->TEST_WaitForCompact();
ASSERT_EQ(NumTableFilesAtLevel(0), 0);
{
SetPerfLevel(kEnableCount);
perf_context.Reset();
int c = 0;
std::unique_ptr<Iterator> iter(db_->NewIterator(ReadOptions()));
for (iter->Seek(Key(0)); iter->Valid(); iter->Next()) {
c++;
}
ASSERT_EQ(c, 2);
ASSERT_EQ(perf_context.internal_delete_skipped_count, 0);
// We iterate every key twice. Is it a bug?
ASSERT_LE(perf_context.internal_key_skipped_count, 2);
SetPerfLevel(kDisable);
}
}
#endif // ROCKSDB_LITE
} // namespace rocksdb
int main(int argc, char** argv) {
rocksdb::port::InstallStackTraceHandler();
::testing::InitGoogleTest(&argc, argv);
return RUN_ALL_TESTS();
}
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