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rocksdb/monitoring/statistics.cc
Hui Xiao bab5f9a6f2 Add new stat rocksdb.table.open.prefetch.tail.read.bytes, rocksdb.table.open.prefetch.tail.{miss|hit} (#11265) 
Summary:
**Context/Summary:**
We are adding new stats to measure behavior of prefetched tail size and look up into this buffer

The stat collection is done in FilePrefetchBuffer but only for prefetched tail buffer during table open for now using FilePrefetchBuffer enum. It's cleaner than the alternative of implementing in upper-level call places of FilePrefetchBuffer for table open. It also has the benefit of extensible to other types of FilePrefetchBuffer if needed. See db bench for perf regression concern.

Pull Request resolved: https://github.com/facebook/rocksdb/pull/11265

Test Plan:
**- Piggyback on existing test**
**- rocksdb.table.open.prefetch.tail.miss is harder to UT so I manually set prefetch tail read bytes to be small and run db bench.**
```
./db_bench -db=/tmp/testdb -statistics=true -benchmarks="fillseq" -key_size=32 -value_size=512 -num=5000 -write_buffer_size=655 -target_file_size_base=655 -disable_auto_compactions=false -compression_type=none -bloom_bits=3  -use_direct_reads=true
```
```
rocksdb.table.open.prefetch.tail.read.bytes P50 : 4096.000000 P95 : 4096.000000 P99 : 4096.000000 P100 : 4096.000000 COUNT : 225 SUM : 921600
rocksdb.table.open.prefetch.tail.miss COUNT : 91
rocksdb.table.open.prefetch.tail.hit COUNT : 1034
```
**- No perf regression observed in db_bench**

SETUP command: create same db with ~900 files for pre-change/post-change.
```
./db_bench -db=/tmp/testdb -benchmarks="fillseq" -key_size=32 -value_size=512 -num=500000 -write_buffer_size=655360  -disable_auto_compactions=true -target_file_size_base=16777216 -compression_type=none
```
TEST command 60 runs or til convergence: as suggested by anand1976 and akankshamahajan15, vary `seek_nexts` and `async_io` in testing.
```
./db_bench -use_existing_db=true -db=/tmp/testdb -statistics=false -cache_size=0 -cache_index_and_filter_blocks=false -benchmarks=seekrandom[-X60] -num=50000 -seek_nexts={10, 500, 1000} -async_io={0|1} -use_direct_reads=true
```
async io = 0, direct io read = true

  | seek_nexts = 10, 30 runs | seek_nexts = 500, 12 runs | seek_nexts = 1000, 6 runs
-- | -- | -- | --
pre-post change | 4776 (± 28) ops/sec;   24.8 (± 0.1) MB/sec | 288 (± 1) ops/sec;   74.8 (± 0.4) MB/sec | 145 (± 4) ops/sec;   75.6 (± 2.2) MB/sec
post-change | 4790 (± 32) ops/sec;   24.9 (± 0.2) MB/sec | 288 (± 3) ops/sec;   74.7 (± 0.8) MB/sec | 143 (± 3) ops/sec;   74.5 (± 1.6) MB/sec

async io = 1, direct io read = true
  | seek_nexts = 10, 54 runs | seek_nexts = 500, 6 runs | seek_nexts = 1000, 4 runs
-- | -- | -- | --
pre-post change | 3350 (± 36) ops/sec;   17.4 (± 0.2) MB/sec | 264 (± 0) ops/sec;   68.7 (± 0.2) MB/sec | 138 (± 1) ops/sec;   71.8 (± 1.0) MB/sec
post-change | 3358 (± 27) ops/sec;   17.4 (± 0.1) MB/sec  | 263 (± 2) ops/sec;   68.3 (± 0.8) MB/sec | 139 (± 1) ops/sec;   72.6 (± 0.6) MB/sec

Reviewed By: ajkr

Differential Revision: D43781467

Pulled By: hx235

fbshipit-source-id: a706a18472a8edb2b952bac3af40eec803537f2a
2023-03-15 14:02:43 -07:00

501 lines
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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 "monitoring/statistics.h"
#include <algorithm>
#include <cinttypes>
#include <cstdio>
#include "rocksdb/convenience.h"
#include "rocksdb/statistics.h"
#include "rocksdb/utilities/customizable_util.h"
#include "rocksdb/utilities/options_type.h"
#include "util/string_util.h"
namespace ROCKSDB_NAMESPACE {
// The order of items listed in Tickers should be the same as
// the order listed in TickersNameMap
const std::vector<std::pair<Tickers, std::string>> TickersNameMap = {
{BLOCK_CACHE_MISS, "rocksdb.block.cache.miss"},
{BLOCK_CACHE_HIT, "rocksdb.block.cache.hit"},
{BLOCK_CACHE_ADD, "rocksdb.block.cache.add"},
{BLOCK_CACHE_ADD_FAILURES, "rocksdb.block.cache.add.failures"},
{BLOCK_CACHE_INDEX_MISS, "rocksdb.block.cache.index.miss"},
{BLOCK_CACHE_INDEX_HIT, "rocksdb.block.cache.index.hit"},
{BLOCK_CACHE_INDEX_ADD, "rocksdb.block.cache.index.add"},
{BLOCK_CACHE_INDEX_BYTES_INSERT, "rocksdb.block.cache.index.bytes.insert"},
{BLOCK_CACHE_FILTER_MISS, "rocksdb.block.cache.filter.miss"},
{BLOCK_CACHE_FILTER_HIT, "rocksdb.block.cache.filter.hit"},
{BLOCK_CACHE_FILTER_ADD, "rocksdb.block.cache.filter.add"},
{BLOCK_CACHE_FILTER_BYTES_INSERT,
"rocksdb.block.cache.filter.bytes.insert"},
{BLOCK_CACHE_DATA_MISS, "rocksdb.block.cache.data.miss"},
{BLOCK_CACHE_DATA_HIT, "rocksdb.block.cache.data.hit"},
{BLOCK_CACHE_DATA_ADD, "rocksdb.block.cache.data.add"},
{BLOCK_CACHE_DATA_BYTES_INSERT, "rocksdb.block.cache.data.bytes.insert"},
{BLOCK_CACHE_BYTES_READ, "rocksdb.block.cache.bytes.read"},
{BLOCK_CACHE_BYTES_WRITE, "rocksdb.block.cache.bytes.write"},
{BLOOM_FILTER_USEFUL, "rocksdb.bloom.filter.useful"},
{BLOOM_FILTER_FULL_POSITIVE, "rocksdb.bloom.filter.full.positive"},
{BLOOM_FILTER_FULL_TRUE_POSITIVE,
"rocksdb.bloom.filter.full.true.positive"},
{PERSISTENT_CACHE_HIT, "rocksdb.persistent.cache.hit"},
{PERSISTENT_CACHE_MISS, "rocksdb.persistent.cache.miss"},
{SIM_BLOCK_CACHE_HIT, "rocksdb.sim.block.cache.hit"},
{SIM_BLOCK_CACHE_MISS, "rocksdb.sim.block.cache.miss"},
{MEMTABLE_HIT, "rocksdb.memtable.hit"},
{MEMTABLE_MISS, "rocksdb.memtable.miss"},
{GET_HIT_L0, "rocksdb.l0.hit"},
{GET_HIT_L1, "rocksdb.l1.hit"},
{GET_HIT_L2_AND_UP, "rocksdb.l2andup.hit"},
{COMPACTION_KEY_DROP_NEWER_ENTRY, "rocksdb.compaction.key.drop.new"},
{COMPACTION_KEY_DROP_OBSOLETE, "rocksdb.compaction.key.drop.obsolete"},
{COMPACTION_KEY_DROP_RANGE_DEL, "rocksdb.compaction.key.drop.range_del"},
{COMPACTION_KEY_DROP_USER, "rocksdb.compaction.key.drop.user"},
{COMPACTION_RANGE_DEL_DROP_OBSOLETE,
"rocksdb.compaction.range_del.drop.obsolete"},
{COMPACTION_OPTIMIZED_DEL_DROP_OBSOLETE,
"rocksdb.compaction.optimized.del.drop.obsolete"},
{COMPACTION_CANCELLED, "rocksdb.compaction.cancelled"},
{NUMBER_KEYS_WRITTEN, "rocksdb.number.keys.written"},
{NUMBER_KEYS_READ, "rocksdb.number.keys.read"},
{NUMBER_KEYS_UPDATED, "rocksdb.number.keys.updated"},
{BYTES_WRITTEN, "rocksdb.bytes.written"},
{BYTES_READ, "rocksdb.bytes.read"},
{NUMBER_DB_SEEK, "rocksdb.number.db.seek"},
{NUMBER_DB_NEXT, "rocksdb.number.db.next"},
{NUMBER_DB_PREV, "rocksdb.number.db.prev"},
{NUMBER_DB_SEEK_FOUND, "rocksdb.number.db.seek.found"},
{NUMBER_DB_NEXT_FOUND, "rocksdb.number.db.next.found"},
{NUMBER_DB_PREV_FOUND, "rocksdb.number.db.prev.found"},
{ITER_BYTES_READ, "rocksdb.db.iter.bytes.read"},
{NO_FILE_OPENS, "rocksdb.no.file.opens"},
{NO_FILE_ERRORS, "rocksdb.no.file.errors"},
{STALL_MICROS, "rocksdb.stall.micros"},
{DB_MUTEX_WAIT_MICROS, "rocksdb.db.mutex.wait.micros"},
{NUMBER_MULTIGET_CALLS, "rocksdb.number.multiget.get"},
{NUMBER_MULTIGET_KEYS_READ, "rocksdb.number.multiget.keys.read"},
{NUMBER_MULTIGET_BYTES_READ, "rocksdb.number.multiget.bytes.read"},
{NUMBER_MERGE_FAILURES, "rocksdb.number.merge.failures"},
{BLOOM_FILTER_PREFIX_CHECKED, "rocksdb.bloom.filter.prefix.checked"},
{BLOOM_FILTER_PREFIX_USEFUL, "rocksdb.bloom.filter.prefix.useful"},
{NUMBER_OF_RESEEKS_IN_ITERATION, "rocksdb.number.reseeks.iteration"},
{GET_UPDATES_SINCE_CALLS, "rocksdb.getupdatessince.calls"},
{WAL_FILE_SYNCED, "rocksdb.wal.synced"},
{WAL_FILE_BYTES, "rocksdb.wal.bytes"},
{WRITE_DONE_BY_SELF, "rocksdb.write.self"},
{WRITE_DONE_BY_OTHER, "rocksdb.write.other"},
{WRITE_WITH_WAL, "rocksdb.write.wal"},
{COMPACT_READ_BYTES, "rocksdb.compact.read.bytes"},
{COMPACT_WRITE_BYTES, "rocksdb.compact.write.bytes"},
{FLUSH_WRITE_BYTES, "rocksdb.flush.write.bytes"},
{COMPACT_READ_BYTES_MARKED, "rocksdb.compact.read.marked.bytes"},
{COMPACT_READ_BYTES_PERIODIC, "rocksdb.compact.read.periodic.bytes"},
{COMPACT_READ_BYTES_TTL, "rocksdb.compact.read.ttl.bytes"},
{COMPACT_WRITE_BYTES_MARKED, "rocksdb.compact.write.marked.bytes"},
{COMPACT_WRITE_BYTES_PERIODIC, "rocksdb.compact.write.periodic.bytes"},
{COMPACT_WRITE_BYTES_TTL, "rocksdb.compact.write.ttl.bytes"},
{NUMBER_DIRECT_LOAD_TABLE_PROPERTIES,
"rocksdb.number.direct.load.table.properties"},
{NUMBER_SUPERVERSION_ACQUIRES, "rocksdb.number.superversion_acquires"},
{NUMBER_SUPERVERSION_RELEASES, "rocksdb.number.superversion_releases"},
{NUMBER_SUPERVERSION_CLEANUPS, "rocksdb.number.superversion_cleanups"},
{NUMBER_BLOCK_COMPRESSED, "rocksdb.number.block.compressed"},
{NUMBER_BLOCK_DECOMPRESSED, "rocksdb.number.block.decompressed"},
{NUMBER_BLOCK_NOT_COMPRESSED, "rocksdb.number.block.not_compressed"},
{MERGE_OPERATION_TOTAL_TIME, "rocksdb.merge.operation.time.nanos"},
{FILTER_OPERATION_TOTAL_TIME, "rocksdb.filter.operation.time.nanos"},
{ROW_CACHE_HIT, "rocksdb.row.cache.hit"},
{ROW_CACHE_MISS, "rocksdb.row.cache.miss"},
{READ_AMP_ESTIMATE_USEFUL_BYTES, "rocksdb.read.amp.estimate.useful.bytes"},
{READ_AMP_TOTAL_READ_BYTES, "rocksdb.read.amp.total.read.bytes"},
{NUMBER_RATE_LIMITER_DRAINS, "rocksdb.number.rate_limiter.drains"},
{NUMBER_ITER_SKIP, "rocksdb.number.iter.skip"},
{BLOB_DB_NUM_PUT, "rocksdb.blobdb.num.put"},
{BLOB_DB_NUM_WRITE, "rocksdb.blobdb.num.write"},
{BLOB_DB_NUM_GET, "rocksdb.blobdb.num.get"},
{BLOB_DB_NUM_MULTIGET, "rocksdb.blobdb.num.multiget"},
{BLOB_DB_NUM_SEEK, "rocksdb.blobdb.num.seek"},
{BLOB_DB_NUM_NEXT, "rocksdb.blobdb.num.next"},
{BLOB_DB_NUM_PREV, "rocksdb.blobdb.num.prev"},
{BLOB_DB_NUM_KEYS_WRITTEN, "rocksdb.blobdb.num.keys.written"},
{BLOB_DB_NUM_KEYS_READ, "rocksdb.blobdb.num.keys.read"},
{BLOB_DB_BYTES_WRITTEN, "rocksdb.blobdb.bytes.written"},
{BLOB_DB_BYTES_READ, "rocksdb.blobdb.bytes.read"},
{BLOB_DB_WRITE_INLINED, "rocksdb.blobdb.write.inlined"},
{BLOB_DB_WRITE_INLINED_TTL, "rocksdb.blobdb.write.inlined.ttl"},
{BLOB_DB_WRITE_BLOB, "rocksdb.blobdb.write.blob"},
{BLOB_DB_WRITE_BLOB_TTL, "rocksdb.blobdb.write.blob.ttl"},
{BLOB_DB_BLOB_FILE_BYTES_WRITTEN, "rocksdb.blobdb.blob.file.bytes.written"},
{BLOB_DB_BLOB_FILE_BYTES_READ, "rocksdb.blobdb.blob.file.bytes.read"},
{BLOB_DB_BLOB_FILE_SYNCED, "rocksdb.blobdb.blob.file.synced"},
{BLOB_DB_BLOB_INDEX_EXPIRED_COUNT,
"rocksdb.blobdb.blob.index.expired.count"},
{BLOB_DB_BLOB_INDEX_EXPIRED_SIZE, "rocksdb.blobdb.blob.index.expired.size"},
{BLOB_DB_BLOB_INDEX_EVICTED_COUNT,
"rocksdb.blobdb.blob.index.evicted.count"},
{BLOB_DB_BLOB_INDEX_EVICTED_SIZE, "rocksdb.blobdb.blob.index.evicted.size"},
{BLOB_DB_GC_NUM_FILES, "rocksdb.blobdb.gc.num.files"},
{BLOB_DB_GC_NUM_NEW_FILES, "rocksdb.blobdb.gc.num.new.files"},
{BLOB_DB_GC_FAILURES, "rocksdb.blobdb.gc.failures"},
{BLOB_DB_GC_NUM_KEYS_RELOCATED, "rocksdb.blobdb.gc.num.keys.relocated"},
{BLOB_DB_GC_BYTES_RELOCATED, "rocksdb.blobdb.gc.bytes.relocated"},
{BLOB_DB_FIFO_NUM_FILES_EVICTED, "rocksdb.blobdb.fifo.num.files.evicted"},
{BLOB_DB_FIFO_NUM_KEYS_EVICTED, "rocksdb.blobdb.fifo.num.keys.evicted"},
{BLOB_DB_FIFO_BYTES_EVICTED, "rocksdb.blobdb.fifo.bytes.evicted"},
{TXN_PREPARE_MUTEX_OVERHEAD, "rocksdb.txn.overhead.mutex.prepare"},
{TXN_OLD_COMMIT_MAP_MUTEX_OVERHEAD,
"rocksdb.txn.overhead.mutex.old.commit.map"},
{TXN_DUPLICATE_KEY_OVERHEAD, "rocksdb.txn.overhead.duplicate.key"},
{TXN_SNAPSHOT_MUTEX_OVERHEAD, "rocksdb.txn.overhead.mutex.snapshot"},
{TXN_GET_TRY_AGAIN, "rocksdb.txn.get.tryagain"},
{NUMBER_MULTIGET_KEYS_FOUND, "rocksdb.number.multiget.keys.found"},
{NO_ITERATOR_CREATED, "rocksdb.num.iterator.created"},
{NO_ITERATOR_DELETED, "rocksdb.num.iterator.deleted"},
{BLOCK_CACHE_COMPRESSION_DICT_MISS,
"rocksdb.block.cache.compression.dict.miss"},
{BLOCK_CACHE_COMPRESSION_DICT_HIT,
"rocksdb.block.cache.compression.dict.hit"},
{BLOCK_CACHE_COMPRESSION_DICT_ADD,
"rocksdb.block.cache.compression.dict.add"},
{BLOCK_CACHE_COMPRESSION_DICT_BYTES_INSERT,
"rocksdb.block.cache.compression.dict.bytes.insert"},
{BLOCK_CACHE_ADD_REDUNDANT, "rocksdb.block.cache.add.redundant"},
{BLOCK_CACHE_INDEX_ADD_REDUNDANT,
"rocksdb.block.cache.index.add.redundant"},
{BLOCK_CACHE_FILTER_ADD_REDUNDANT,
"rocksdb.block.cache.filter.add.redundant"},
{BLOCK_CACHE_DATA_ADD_REDUNDANT, "rocksdb.block.cache.data.add.redundant"},
{BLOCK_CACHE_COMPRESSION_DICT_ADD_REDUNDANT,
"rocksdb.block.cache.compression.dict.add.redundant"},
{FILES_MARKED_TRASH, "rocksdb.files.marked.trash"},
{FILES_DELETED_IMMEDIATELY, "rocksdb.files.deleted.immediately"},
{ERROR_HANDLER_BG_ERROR_COUNT, "rocksdb.error.handler.bg.errro.count"},
{ERROR_HANDLER_BG_IO_ERROR_COUNT,
"rocksdb.error.handler.bg.io.errro.count"},
{ERROR_HANDLER_BG_RETRYABLE_IO_ERROR_COUNT,
"rocksdb.error.handler.bg.retryable.io.errro.count"},
{ERROR_HANDLER_AUTORESUME_COUNT, "rocksdb.error.handler.autoresume.count"},
{ERROR_HANDLER_AUTORESUME_RETRY_TOTAL_COUNT,
"rocksdb.error.handler.autoresume.retry.total.count"},
{ERROR_HANDLER_AUTORESUME_SUCCESS_COUNT,
"rocksdb.error.handler.autoresume.success.count"},
{MEMTABLE_PAYLOAD_BYTES_AT_FLUSH,
"rocksdb.memtable.payload.bytes.at.flush"},
{MEMTABLE_GARBAGE_BYTES_AT_FLUSH,
"rocksdb.memtable.garbage.bytes.at.flush"},
{SECONDARY_CACHE_HITS, "rocksdb.secondary.cache.hits"},
{VERIFY_CHECKSUM_READ_BYTES, "rocksdb.verify_checksum.read.bytes"},
{BACKUP_READ_BYTES, "rocksdb.backup.read.bytes"},
{BACKUP_WRITE_BYTES, "rocksdb.backup.write.bytes"},
{REMOTE_COMPACT_READ_BYTES, "rocksdb.remote.compact.read.bytes"},
{REMOTE_COMPACT_WRITE_BYTES, "rocksdb.remote.compact.write.bytes"},
{HOT_FILE_READ_BYTES, "rocksdb.hot.file.read.bytes"},
{WARM_FILE_READ_BYTES, "rocksdb.warm.file.read.bytes"},
{COLD_FILE_READ_BYTES, "rocksdb.cold.file.read.bytes"},
{HOT_FILE_READ_COUNT, "rocksdb.hot.file.read.count"},
{WARM_FILE_READ_COUNT, "rocksdb.warm.file.read.count"},
{COLD_FILE_READ_COUNT, "rocksdb.cold.file.read.count"},
{LAST_LEVEL_READ_BYTES, "rocksdb.last.level.read.bytes"},
{LAST_LEVEL_READ_COUNT, "rocksdb.last.level.read.count"},
{NON_LAST_LEVEL_READ_BYTES, "rocksdb.non.last.level.read.bytes"},
{NON_LAST_LEVEL_READ_COUNT, "rocksdb.non.last.level.read.count"},
{BLOCK_CHECKSUM_COMPUTE_COUNT, "rocksdb.block.checksum.compute.count"},
{MULTIGET_COROUTINE_COUNT, "rocksdb.multiget.coroutine.count"},
{BLOB_DB_CACHE_MISS, "rocksdb.blobdb.cache.miss"},
{BLOB_DB_CACHE_HIT, "rocksdb.blobdb.cache.hit"},
{BLOB_DB_CACHE_ADD, "rocksdb.blobdb.cache.add"},
{BLOB_DB_CACHE_ADD_FAILURES, "rocksdb.blobdb.cache.add.failures"},
{BLOB_DB_CACHE_BYTES_READ, "rocksdb.blobdb.cache.bytes.read"},
{BLOB_DB_CACHE_BYTES_WRITE, "rocksdb.blobdb.cache.bytes.write"},
{READ_ASYNC_MICROS, "rocksdb.read.async.micros"},
{ASYNC_READ_ERROR_COUNT, "rocksdb.async.read.error.count"},
{SECONDARY_CACHE_FILTER_HITS, "rocksdb.secondary.cache.filter.hits"},
{SECONDARY_CACHE_INDEX_HITS, "rocksdb.secondary.cache.index.hits"},
{SECONDARY_CACHE_DATA_HITS, "rocksdb.secondary.cache.data.hits"},
{TABLE_OPEN_PREFETCH_TAIL_MISS, "rocksdb.table.open.prefetch.tail.miss"},
{TABLE_OPEN_PREFETCH_TAIL_HIT, "rocksdb.table.open.prefetch.tail.hit"},
};
const std::vector<std::pair<Histograms, std::string>> HistogramsNameMap = {
{DB_GET, "rocksdb.db.get.micros"},
{DB_WRITE, "rocksdb.db.write.micros"},
{COMPACTION_TIME, "rocksdb.compaction.times.micros"},
{COMPACTION_CPU_TIME, "rocksdb.compaction.times.cpu_micros"},
{SUBCOMPACTION_SETUP_TIME, "rocksdb.subcompaction.setup.times.micros"},
{TABLE_SYNC_MICROS, "rocksdb.table.sync.micros"},
{COMPACTION_OUTFILE_SYNC_MICROS, "rocksdb.compaction.outfile.sync.micros"},
{WAL_FILE_SYNC_MICROS, "rocksdb.wal.file.sync.micros"},
{MANIFEST_FILE_SYNC_MICROS, "rocksdb.manifest.file.sync.micros"},
{TABLE_OPEN_IO_MICROS, "rocksdb.table.open.io.micros"},
{DB_MULTIGET, "rocksdb.db.multiget.micros"},
{READ_BLOCK_COMPACTION_MICROS, "rocksdb.read.block.compaction.micros"},
{READ_BLOCK_GET_MICROS, "rocksdb.read.block.get.micros"},
{WRITE_RAW_BLOCK_MICROS, "rocksdb.write.raw.block.micros"},
{NUM_FILES_IN_SINGLE_COMPACTION, "rocksdb.numfiles.in.singlecompaction"},
{DB_SEEK, "rocksdb.db.seek.micros"},
{WRITE_STALL, "rocksdb.db.write.stall"},
{SST_READ_MICROS, "rocksdb.sst.read.micros"},
{NUM_SUBCOMPACTIONS_SCHEDULED, "rocksdb.num.subcompactions.scheduled"},
{BYTES_PER_READ, "rocksdb.bytes.per.read"},
{BYTES_PER_WRITE, "rocksdb.bytes.per.write"},
{BYTES_PER_MULTIGET, "rocksdb.bytes.per.multiget"},
{BYTES_COMPRESSED, "rocksdb.bytes.compressed"},
{BYTES_DECOMPRESSED, "rocksdb.bytes.decompressed"},
{COMPRESSION_TIMES_NANOS, "rocksdb.compression.times.nanos"},
{DECOMPRESSION_TIMES_NANOS, "rocksdb.decompression.times.nanos"},
{READ_NUM_MERGE_OPERANDS, "rocksdb.read.num.merge_operands"},
{BLOB_DB_KEY_SIZE, "rocksdb.blobdb.key.size"},
{BLOB_DB_VALUE_SIZE, "rocksdb.blobdb.value.size"},
{BLOB_DB_WRITE_MICROS, "rocksdb.blobdb.write.micros"},
{BLOB_DB_GET_MICROS, "rocksdb.blobdb.get.micros"},
{BLOB_DB_MULTIGET_MICROS, "rocksdb.blobdb.multiget.micros"},
{BLOB_DB_SEEK_MICROS, "rocksdb.blobdb.seek.micros"},
{BLOB_DB_NEXT_MICROS, "rocksdb.blobdb.next.micros"},
{BLOB_DB_PREV_MICROS, "rocksdb.blobdb.prev.micros"},
{BLOB_DB_BLOB_FILE_WRITE_MICROS, "rocksdb.blobdb.blob.file.write.micros"},
{BLOB_DB_BLOB_FILE_READ_MICROS, "rocksdb.blobdb.blob.file.read.micros"},
{BLOB_DB_BLOB_FILE_SYNC_MICROS, "rocksdb.blobdb.blob.file.sync.micros"},
{BLOB_DB_COMPRESSION_MICROS, "rocksdb.blobdb.compression.micros"},
{BLOB_DB_DECOMPRESSION_MICROS, "rocksdb.blobdb.decompression.micros"},
{FLUSH_TIME, "rocksdb.db.flush.micros"},
{SST_BATCH_SIZE, "rocksdb.sst.batch.size"},
{NUM_INDEX_AND_FILTER_BLOCKS_READ_PER_LEVEL,
"rocksdb.num.index.and.filter.blocks.read.per.level"},
{NUM_SST_READ_PER_LEVEL, "rocksdb.num.sst.read.per.level"},
{ERROR_HANDLER_AUTORESUME_RETRY_COUNT,
"rocksdb.error.handler.autoresume.retry.count"},
{ASYNC_READ_BYTES, "rocksdb.async.read.bytes"},
{POLL_WAIT_MICROS, "rocksdb.poll.wait.micros"},
{PREFETCHED_BYTES_DISCARDED, "rocksdb.prefetched.bytes.discarded"},
{MULTIGET_IO_BATCH_SIZE, "rocksdb.multiget.io.batch.size"},
{NUM_LEVEL_READ_PER_MULTIGET, "rocksdb.num.level.read.per.multiget"},
{ASYNC_PREFETCH_ABORT_MICROS, "rocksdb.async.prefetch.abort.micros"},
{TABLE_OPEN_PREFETCH_TAIL_READ_BYTES,
"rocksdb.table.open.prefetch.tail.read.bytes"},
};
std::shared_ptr<Statistics> CreateDBStatistics() {
return std::make_shared<StatisticsImpl>(nullptr);
}
static int RegisterBuiltinStatistics(ObjectLibrary& library,
const std::string& /*arg*/) {
library.AddFactory<Statistics>(
StatisticsImpl::kClassName(),
[](const std::string& /*uri*/, std::unique_ptr<Statistics>* guard,
std::string* /* errmsg */) {
guard->reset(new StatisticsImpl(nullptr));
return guard->get();
});
return 1;
}
Status Statistics::CreateFromString(const ConfigOptions& config_options,
const std::string& id,
std::shared_ptr<Statistics>* result) {
static std::once_flag once;
std::call_once(once, [&]() {
RegisterBuiltinStatistics(*(ObjectLibrary::Default().get()), "");
});
Status s;
if (id == "" || id == StatisticsImpl::kClassName()) {
result->reset(new StatisticsImpl(nullptr));
} else if (id == kNullptrString) {
result->reset();
} else {
s = LoadSharedObject<Statistics>(config_options, id, result);
}
return s;
}
static std::unordered_map<std::string, OptionTypeInfo> stats_type_info = {
{"inner", OptionTypeInfo::AsCustomSharedPtr<Statistics>(
0, OptionVerificationType::kByNameAllowFromNull,
OptionTypeFlags::kCompareNever)},
};
StatisticsImpl::StatisticsImpl(std::shared_ptr<Statistics> stats)
: stats_(std::move(stats)) {
RegisterOptions("StatisticsOptions", &stats_, &stats_type_info);
}
StatisticsImpl::~StatisticsImpl() {}
uint64_t StatisticsImpl::getTickerCount(uint32_t tickerType) const {
MutexLock lock(&aggregate_lock_);
return getTickerCountLocked(tickerType);
}
uint64_t StatisticsImpl::getTickerCountLocked(uint32_t tickerType) const {
assert(tickerType < TICKER_ENUM_MAX);
uint64_t res = 0;
for (size_t core_idx = 0; core_idx < per_core_stats_.Size(); ++core_idx) {
res += per_core_stats_.AccessAtCore(core_idx)->tickers_[tickerType];
}
return res;
}
void StatisticsImpl::histogramData(uint32_t histogramType,
HistogramData* const data) const {
MutexLock lock(&aggregate_lock_);
getHistogramImplLocked(histogramType)->Data(data);
}
std::unique_ptr<HistogramImpl> StatisticsImpl::getHistogramImplLocked(
uint32_t histogramType) const {
assert(histogramType < HISTOGRAM_ENUM_MAX);
std::unique_ptr<HistogramImpl> res_hist(new HistogramImpl());
for (size_t core_idx = 0; core_idx < per_core_stats_.Size(); ++core_idx) {
res_hist->Merge(
per_core_stats_.AccessAtCore(core_idx)->histograms_[histogramType]);
}
return res_hist;
}
std::string StatisticsImpl::getHistogramString(uint32_t histogramType) const {
MutexLock lock(&aggregate_lock_);
return getHistogramImplLocked(histogramType)->ToString();
}
void StatisticsImpl::setTickerCount(uint32_t tickerType, uint64_t count) {
{
MutexLock lock(&aggregate_lock_);
setTickerCountLocked(tickerType, count);
}
if (stats_ && tickerType < TICKER_ENUM_MAX) {
stats_->setTickerCount(tickerType, count);
}
}
void StatisticsImpl::setTickerCountLocked(uint32_t tickerType, uint64_t count) {
assert(tickerType < TICKER_ENUM_MAX);
for (size_t core_idx = 0; core_idx < per_core_stats_.Size(); ++core_idx) {
if (core_idx == 0) {
per_core_stats_.AccessAtCore(core_idx)->tickers_[tickerType] = count;
} else {
per_core_stats_.AccessAtCore(core_idx)->tickers_[tickerType] = 0;
}
}
}
uint64_t StatisticsImpl::getAndResetTickerCount(uint32_t tickerType) {
uint64_t sum = 0;
{
MutexLock lock(&aggregate_lock_);
assert(tickerType < TICKER_ENUM_MAX);
for (size_t core_idx = 0; core_idx < per_core_stats_.Size(); ++core_idx) {
sum +=
per_core_stats_.AccessAtCore(core_idx)->tickers_[tickerType].exchange(
0, std::memory_order_relaxed);
}
}
if (stats_ && tickerType < TICKER_ENUM_MAX) {
stats_->setTickerCount(tickerType, 0);
}
return sum;
}
void StatisticsImpl::recordTick(uint32_t tickerType, uint64_t count) {
if (get_stats_level() <= StatsLevel::kExceptTickers) {
return;
}
if (tickerType < TICKER_ENUM_MAX) {
per_core_stats_.Access()->tickers_[tickerType].fetch_add(
count, std::memory_order_relaxed);
if (stats_) {
stats_->recordTick(tickerType, count);
}
} else {
assert(false);
}
}
void StatisticsImpl::recordInHistogram(uint32_t histogramType, uint64_t value) {
assert(histogramType < HISTOGRAM_ENUM_MAX);
if (get_stats_level() <= StatsLevel::kExceptHistogramOrTimers) {
return;
}
per_core_stats_.Access()->histograms_[histogramType].Add(value);
if (stats_ && histogramType < HISTOGRAM_ENUM_MAX) {
stats_->recordInHistogram(histogramType, value);
}
}
Status StatisticsImpl::Reset() {
MutexLock lock(&aggregate_lock_);
for (uint32_t i = 0; i < TICKER_ENUM_MAX; ++i) {
setTickerCountLocked(i, 0);
}
for (uint32_t i = 0; i < HISTOGRAM_ENUM_MAX; ++i) {
for (size_t core_idx = 0; core_idx < per_core_stats_.Size(); ++core_idx) {
per_core_stats_.AccessAtCore(core_idx)->histograms_[i].Clear();
}
}
return Status::OK();
}
namespace {
// a buffer size used for temp string buffers
const int kTmpStrBufferSize = 200;
} // namespace
std::string StatisticsImpl::ToString() const {
MutexLock lock(&aggregate_lock_);
std::string res;
res.reserve(20000);
for (const auto& t : TickersNameMap) {
assert(t.first < TICKER_ENUM_MAX);
char buffer[kTmpStrBufferSize];
snprintf(buffer, kTmpStrBufferSize, "%s COUNT : %" PRIu64 "\n",
t.second.c_str(), getTickerCountLocked(t.first));
res.append(buffer);
}
for (const auto& h : HistogramsNameMap) {
assert(h.first < HISTOGRAM_ENUM_MAX);
char buffer[kTmpStrBufferSize];
HistogramData hData;
getHistogramImplLocked(h.first)->Data(&hData);
// don't handle failures - buffer should always be big enough and arguments
// should be provided correctly
int ret =
snprintf(buffer, kTmpStrBufferSize,
"%s P50 : %f P95 : %f P99 : %f P100 : %f COUNT : %" PRIu64
" SUM : %" PRIu64 "\n",
h.second.c_str(), hData.median, hData.percentile95,
hData.percentile99, hData.max, hData.count, hData.sum);
if (ret < 0 || ret >= kTmpStrBufferSize) {
assert(false);
continue;
}
res.append(buffer);
}
res.shrink_to_fit();
return res;
}
bool StatisticsImpl::getTickerMap(
std::map<std::string, uint64_t>* stats_map) const {
assert(stats_map);
if (!stats_map) return false;
stats_map->clear();
MutexLock lock(&aggregate_lock_);
for (const auto& t : TickersNameMap) {
assert(t.first < TICKER_ENUM_MAX);
(*stats_map)[t.second.c_str()] = getTickerCountLocked(t.first);
}
return true;
}
bool StatisticsImpl::HistEnabledForType(uint32_t type) const {
return type < HISTOGRAM_ENUM_MAX;
}
} // namespace ROCKSDB_NAMESPACE
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