fork of https://github.com/oxigraph/rocksdb and https://github.com/facebook/rocksdb for nextgraph and oxigraph
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616 lines
24 KiB
616 lines
24 KiB
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
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// This source code is licensed under both the GPLv2 (found in the
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// COPYING file in the root directory) and Apache 2.0 License
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// (found in the LICENSE.Apache file in the root directory).
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#ifndef ROCKSDB_LITE
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#ifdef GFLAGS
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#include "tools/block_cache_trace_analyzer.h"
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#include <cinttypes>
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#include <fstream>
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#include <iomanip>
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#include <iostream>
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#include <set>
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#include <sstream>
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#include "monitoring/histogram.h"
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#include "util/gflags_compat.h"
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#include "util/string_util.h"
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using GFLAGS_NAMESPACE::ParseCommandLineFlags;
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DEFINE_string(block_cache_trace_path, "", "The trace file path.");
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DEFINE_string(
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block_cache_sim_config_path, "",
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"The config file path. One cache configuration per line. The format of a "
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"cache configuration is "
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"cache_name,num_shard_bits,cache_capacity_1,...,cache_capacity_N. "
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"cache_name is lru. cache_capacity can be xK, xM or xG "
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"where x is a positive number.");
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DEFINE_bool(print_block_size_stats, false,
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"Print block size distribution and the distribution break down by "
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"block type and column family.");
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DEFINE_bool(print_access_count_stats, false,
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"Print access count distribution and the distribution break down "
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"by block type and column family.");
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DEFINE_bool(print_data_block_access_count_stats, false,
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"Print data block accesses by user Get and Multi-Get.");
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DEFINE_int32(cache_sim_warmup_seconds, 0,
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"The number of seconds to warmup simulated caches. The hit/miss "
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"counters are reset after the warmup completes.");
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DEFINE_string(output_miss_ratio_curve_path, "",
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"The output file to save the computed miss ratios. File format: "
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"cache_name,num_shard_bits,capacity,miss_ratio,total_accesses");
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namespace rocksdb {
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namespace {
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std::string block_type_to_string(TraceType type) {
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switch (type) {
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case kBlockTraceFilterBlock:
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return "Filter";
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case kBlockTraceDataBlock:
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return "Data";
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case kBlockTraceIndexBlock:
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return "Index";
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case kBlockTraceRangeDeletionBlock:
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return "RangeDeletion";
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case kBlockTraceUncompressionDictBlock:
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return "UncompressionDict";
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default:
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break;
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}
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// This cannot happen.
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return "InvalidType";
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}
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std::string caller_to_string(BlockCacheLookupCaller caller) {
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switch (caller) {
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case kUserGet:
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return "Get";
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case kUserMGet:
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return "MultiGet";
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case kUserIterator:
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return "Iterator";
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case kPrefetch:
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return "Prefetch";
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case kCompaction:
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return "Compaction";
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default:
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break;
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}
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// This cannot happen.
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return "InvalidCaller";
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}
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const char kBreakLine[] =
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"***************************************************************\n";
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void print_break_lines(uint32_t num_break_lines) {
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for (uint32_t i = 0; i < num_break_lines; i++) {
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fprintf(stdout, kBreakLine);
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}
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}
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} // namespace
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BlockCacheTraceSimulator::BlockCacheTraceSimulator(
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uint64_t warmup_seconds,
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const std::vector<CacheConfiguration>& cache_configurations)
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: warmup_seconds_(warmup_seconds),
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cache_configurations_(cache_configurations) {
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for (auto const& config : cache_configurations_) {
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for (auto cache_capacity : config.cache_capacities) {
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sim_caches_.push_back(
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NewSimCache(NewLRUCache(cache_capacity, config.num_shard_bits),
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/*real_cache=*/nullptr, config.num_shard_bits));
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}
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}
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}
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void BlockCacheTraceSimulator::Access(const BlockCacheTraceRecord& access) {
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if (trace_start_time_ == 0) {
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trace_start_time_ = access.access_timestamp;
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}
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// access.access_timestamp is in microseconds.
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if (!warmup_complete_ && trace_start_time_ + warmup_seconds_ * 1000000 <=
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access.access_timestamp) {
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for (auto& sim_cache : sim_caches_) {
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sim_cache->reset_counter();
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}
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warmup_complete_ = true;
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}
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for (auto& sim_cache : sim_caches_) {
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auto handle = sim_cache->Lookup(access.block_key);
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if (handle == nullptr && !access.no_insert) {
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sim_cache->Insert(access.block_key, /*value=*/nullptr, access.block_size,
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/*deleter=*/nullptr);
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}
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}
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}
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void BlockCacheTraceAnalyzer::PrintMissRatioCurves() const {
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if (!cache_simulator_) {
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return;
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}
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if (output_miss_ratio_curve_path_.empty()) {
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return;
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}
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std::ofstream out(output_miss_ratio_curve_path_);
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if (!out.is_open()) {
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return;
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}
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// Write header.
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const std::string header =
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"cache_name,num_shard_bits,capacity,miss_ratio,total_accesses";
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out << header << std::endl;
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uint64_t sim_cache_index = 0;
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for (auto const& config : cache_simulator_->cache_configurations()) {
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for (auto cache_capacity : config.cache_capacities) {
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uint64_t hits =
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cache_simulator_->sim_caches()[sim_cache_index]->get_hit_counter();
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uint64_t misses =
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cache_simulator_->sim_caches()[sim_cache_index]->get_miss_counter();
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uint64_t total_accesses = hits + misses;
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double miss_ratio = static_cast<double>(misses * 100.0 / total_accesses);
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// Write the body.
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out << config.cache_name;
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out << ",";
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out << config.num_shard_bits;
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out << ",";
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out << cache_capacity;
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out << ",";
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out << std::fixed << std::setprecision(4) << miss_ratio;
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out << ",";
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out << total_accesses;
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out << std::endl;
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sim_cache_index++;
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}
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}
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out.close();
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}
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BlockCacheTraceAnalyzer::BlockCacheTraceAnalyzer(
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const std::string& trace_file_path,
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const std::string& output_miss_ratio_curve_path,
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std::unique_ptr<BlockCacheTraceSimulator>&& cache_simulator)
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: trace_file_path_(trace_file_path),
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output_miss_ratio_curve_path_(output_miss_ratio_curve_path),
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cache_simulator_(std::move(cache_simulator)) {
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env_ = rocksdb::Env::Default();
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}
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void BlockCacheTraceAnalyzer::RecordAccess(
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const BlockCacheTraceRecord& access) {
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ColumnFamilyAccessInfoAggregate& cf_aggr = cf_aggregates_map_[access.cf_name];
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SSTFileAccessInfoAggregate& file_aggr =
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cf_aggr.fd_aggregates_map[access.sst_fd_number];
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file_aggr.level = access.level;
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BlockTypeAccessInfoAggregate& block_type_aggr =
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file_aggr.block_type_aggregates_map[access.block_type];
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BlockAccessInfo& block_access_info =
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block_type_aggr.block_access_info_map[access.block_key];
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block_access_info.AddAccess(access);
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}
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Status BlockCacheTraceAnalyzer::Analyze() {
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std::unique_ptr<TraceReader> trace_reader;
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Status s =
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NewFileTraceReader(env_, EnvOptions(), trace_file_path_, &trace_reader);
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if (!s.ok()) {
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return s;
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}
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BlockCacheTraceReader reader(std::move(trace_reader));
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s = reader.ReadHeader(&header_);
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if (!s.ok()) {
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return s;
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}
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while (s.ok()) {
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BlockCacheTraceRecord access;
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s = reader.ReadAccess(&access);
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if (!s.ok()) {
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return s;
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}
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RecordAccess(access);
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if (cache_simulator_) {
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cache_simulator_->Access(access);
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}
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}
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return Status::OK();
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}
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void BlockCacheTraceAnalyzer::PrintBlockSizeStats() const {
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HistogramStat bs_stats;
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std::map<TraceType, HistogramStat> bt_stats_map;
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std::map<std::string, std::map<TraceType, HistogramStat>> cf_bt_stats_map;
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for (auto const& cf_aggregates : cf_aggregates_map_) {
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// Stats per column family.
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const std::string& cf_name = cf_aggregates.first;
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for (auto const& file_aggregates : cf_aggregates.second.fd_aggregates_map) {
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// Stats per SST file.
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for (auto const& block_type_aggregates :
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file_aggregates.second.block_type_aggregates_map) {
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// Stats per block type.
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const TraceType type = block_type_aggregates.first;
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for (auto const& block_access_info :
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block_type_aggregates.second.block_access_info_map) {
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// Stats per block.
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bs_stats.Add(block_access_info.second.block_size);
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bt_stats_map[type].Add(block_access_info.second.block_size);
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cf_bt_stats_map[cf_name][type].Add(
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block_access_info.second.block_size);
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}
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}
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}
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}
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fprintf(stdout, "Block size stats: \n%s", bs_stats.ToString().c_str());
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for (auto const& bt_stats : bt_stats_map) {
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print_break_lines(/*num_break_lines=*/1);
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fprintf(stdout, "Block size stats for block type %s: \n%s",
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block_type_to_string(bt_stats.first).c_str(),
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bt_stats.second.ToString().c_str());
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}
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for (auto const& cf_bt_stats : cf_bt_stats_map) {
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const std::string& cf_name = cf_bt_stats.first;
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for (auto const& bt_stats : cf_bt_stats.second) {
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print_break_lines(/*num_break_lines=*/1);
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fprintf(stdout,
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"Block size stats for column family %s and block type %s: \n%s",
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cf_name.c_str(), block_type_to_string(bt_stats.first).c_str(),
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bt_stats.second.ToString().c_str());
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}
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}
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}
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void BlockCacheTraceAnalyzer::PrintAccessCountStats() const {
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HistogramStat access_stats;
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std::map<TraceType, HistogramStat> bt_stats_map;
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std::map<std::string, std::map<TraceType, HistogramStat>> cf_bt_stats_map;
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for (auto const& cf_aggregates : cf_aggregates_map_) {
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// Stats per column family.
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const std::string& cf_name = cf_aggregates.first;
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for (auto const& file_aggregates : cf_aggregates.second.fd_aggregates_map) {
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// Stats per SST file.
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for (auto const& block_type_aggregates :
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file_aggregates.second.block_type_aggregates_map) {
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// Stats per block type.
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const TraceType type = block_type_aggregates.first;
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for (auto const& block_access_info :
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block_type_aggregates.second.block_access_info_map) {
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// Stats per block.
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access_stats.Add(block_access_info.second.num_accesses);
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bt_stats_map[type].Add(block_access_info.second.num_accesses);
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cf_bt_stats_map[cf_name][type].Add(
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block_access_info.second.num_accesses);
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}
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}
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}
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}
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fprintf(stdout, "Block access count stats: \n%s",
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access_stats.ToString().c_str());
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for (auto const& bt_stats : bt_stats_map) {
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print_break_lines(/*num_break_lines=*/1);
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fprintf(stdout, "Block access count stats for block type %s: \n%s",
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block_type_to_string(bt_stats.first).c_str(),
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bt_stats.second.ToString().c_str());
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}
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for (auto const& cf_bt_stats : cf_bt_stats_map) {
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const std::string& cf_name = cf_bt_stats.first;
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for (auto const& bt_stats : cf_bt_stats.second) {
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print_break_lines(/*num_break_lines=*/1);
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fprintf(stdout,
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"Block access count stats for column family %s and block type "
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"%s: \n%s",
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cf_name.c_str(), block_type_to_string(bt_stats.first).c_str(),
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bt_stats.second.ToString().c_str());
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}
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}
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}
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void BlockCacheTraceAnalyzer::PrintDataBlockAccessStats() const {
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HistogramStat existing_keys_stats;
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std::map<std::string, HistogramStat> cf_existing_keys_stats_map;
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HistogramStat non_existing_keys_stats;
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std::map<std::string, HistogramStat> cf_non_existing_keys_stats_map;
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HistogramStat block_access_stats;
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std::map<std::string, HistogramStat> cf_block_access_info;
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for (auto const& cf_aggregates : cf_aggregates_map_) {
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// Stats per column family.
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const std::string& cf_name = cf_aggregates.first;
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for (auto const& file_aggregates : cf_aggregates.second.fd_aggregates_map) {
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// Stats per SST file.
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for (auto const& block_type_aggregates :
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file_aggregates.second.block_type_aggregates_map) {
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// Stats per block type.
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for (auto const& block_access_info :
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block_type_aggregates.second.block_access_info_map) {
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// Stats per block.
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if (block_access_info.second.num_keys == 0) {
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continue;
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}
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// Use four decimal points.
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uint64_t percent_referenced_for_existing_keys = (uint64_t)(
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((double)block_access_info.second.key_num_access_map.size() /
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(double)block_access_info.second.num_keys) *
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10000.0);
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uint64_t percent_referenced_for_non_existing_keys =
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(uint64_t)(((double)block_access_info.second
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.non_exist_key_num_access_map.size() /
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(double)block_access_info.second.num_keys) *
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10000.0);
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uint64_t percent_accesses_for_existing_keys = (uint64_t)(
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((double)
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block_access_info.second.num_referenced_key_exist_in_block /
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(double)block_access_info.second.num_accesses) *
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10000.0);
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existing_keys_stats.Add(percent_referenced_for_existing_keys);
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cf_existing_keys_stats_map[cf_name].Add(
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percent_referenced_for_existing_keys);
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non_existing_keys_stats.Add(percent_referenced_for_non_existing_keys);
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cf_non_existing_keys_stats_map[cf_name].Add(
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percent_referenced_for_non_existing_keys);
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block_access_stats.Add(percent_accesses_for_existing_keys);
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cf_block_access_info[cf_name].Add(percent_accesses_for_existing_keys);
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}
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}
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}
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}
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fprintf(stdout,
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"Histogram on percentage of referenced keys existing in a block over "
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"the total number of keys in a block: \n%s",
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existing_keys_stats.ToString().c_str());
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for (auto const& cf_stats : cf_existing_keys_stats_map) {
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print_break_lines(/*num_break_lines=*/1);
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fprintf(stdout, "Break down by column family %s: \n%s",
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cf_stats.first.c_str(), cf_stats.second.ToString().c_str());
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}
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print_break_lines(/*num_break_lines=*/1);
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fprintf(
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stdout,
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"Histogram on percentage of referenced keys DO NOT exist in a block over "
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"the total number of keys in a block: \n%s",
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non_existing_keys_stats.ToString().c_str());
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for (auto const& cf_stats : cf_non_existing_keys_stats_map) {
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print_break_lines(/*num_break_lines=*/1);
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fprintf(stdout, "Break down by column family %s: \n%s",
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cf_stats.first.c_str(), cf_stats.second.ToString().c_str());
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}
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print_break_lines(/*num_break_lines=*/1);
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fprintf(stdout,
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"Histogram on percentage of accesses on keys exist in a block over "
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"the total number of accesses in a block: \n%s",
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block_access_stats.ToString().c_str());
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for (auto const& cf_stats : cf_block_access_info) {
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print_break_lines(/*num_break_lines=*/1);
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fprintf(stdout, "Break down by column family %s: \n%s",
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cf_stats.first.c_str(), cf_stats.second.ToString().c_str());
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}
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}
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void BlockCacheTraceAnalyzer::PrintStatsSummary() const {
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uint64_t total_num_files = 0;
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uint64_t total_num_blocks = 0;
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uint64_t total_num_accesses = 0;
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std::map<TraceType, uint64_t> bt_num_blocks_map;
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std::map<BlockCacheLookupCaller, uint64_t> caller_num_access_map;
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std::map<BlockCacheLookupCaller, std::map<TraceType, uint64_t>>
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caller_bt_num_access_map;
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std::map<BlockCacheLookupCaller, std::map<uint32_t, uint64_t>>
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caller_level_num_access_map;
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for (auto const& cf_aggregates : cf_aggregates_map_) {
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// Stats per column family.
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const std::string& cf_name = cf_aggregates.first;
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uint64_t cf_num_files = 0;
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uint64_t cf_num_blocks = 0;
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std::map<TraceType, uint64_t> cf_bt_blocks;
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uint64_t cf_num_accesses = 0;
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std::map<BlockCacheLookupCaller, uint64_t> cf_caller_num_accesses_map;
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std::map<BlockCacheLookupCaller, std::map<uint64_t, uint64_t>>
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cf_caller_level_num_accesses_map;
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std::map<BlockCacheLookupCaller, std::map<uint64_t, uint64_t>>
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cf_caller_file_num_accesses_map;
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std::map<BlockCacheLookupCaller, std::map<TraceType, uint64_t>>
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cf_caller_bt_num_accesses_map;
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total_num_files += cf_aggregates.second.fd_aggregates_map.size();
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for (auto const& file_aggregates : cf_aggregates.second.fd_aggregates_map) {
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// Stats per SST file.
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const uint64_t fd = file_aggregates.first;
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const uint32_t level = file_aggregates.second.level;
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cf_num_files++;
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for (auto const& block_type_aggregates :
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file_aggregates.second.block_type_aggregates_map) {
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// Stats per block type.
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const TraceType type = block_type_aggregates.first;
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cf_bt_blocks[type] +=
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block_type_aggregates.second.block_access_info_map.size();
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total_num_blocks +=
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block_type_aggregates.second.block_access_info_map.size();
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bt_num_blocks_map[type] +=
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block_type_aggregates.second.block_access_info_map.size();
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for (auto const& block_access_info :
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block_type_aggregates.second.block_access_info_map) {
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// Stats per block.
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cf_num_blocks++;
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for (auto const& stats :
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block_access_info.second.caller_num_access_map) {
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|
// Stats per caller.
|
|
const BlockCacheLookupCaller caller = stats.first;
|
|
const uint64_t num_accesses = stats.second;
|
|
// Overall stats.
|
|
total_num_accesses += num_accesses;
|
|
caller_num_access_map[caller] += num_accesses;
|
|
caller_bt_num_access_map[caller][type] += num_accesses;
|
|
caller_level_num_access_map[caller][level] += num_accesses;
|
|
// Column Family stats.
|
|
cf_num_accesses += num_accesses;
|
|
cf_caller_num_accesses_map[caller] += num_accesses;
|
|
cf_caller_level_num_accesses_map[caller][level] += num_accesses;
|
|
cf_caller_file_num_accesses_map[caller][fd] += num_accesses;
|
|
cf_caller_bt_num_accesses_map[caller][type] += num_accesses;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Print stats.
|
|
print_break_lines(/*num_break_lines=*/3);
|
|
fprintf(stdout, "Statistics for column family %s:\n", cf_name.c_str());
|
|
fprintf(stdout,
|
|
"Number of files:%" PRIu64 "Number of blocks: %" PRIu64
|
|
"Number of accesses: %" PRIu64 "\n",
|
|
cf_num_files, cf_num_blocks, cf_num_accesses);
|
|
for (auto block_type : cf_bt_blocks) {
|
|
fprintf(stdout, "Number of %s blocks: %" PRIu64 "\n",
|
|
block_type_to_string(block_type.first).c_str(),
|
|
block_type.second);
|
|
}
|
|
for (auto caller : cf_caller_num_accesses_map) {
|
|
print_break_lines(/*num_break_lines=*/1);
|
|
fprintf(stdout, "Caller %s: Number of accesses %" PRIu64 "\n",
|
|
caller_to_string(caller.first).c_str(), caller.second);
|
|
fprintf(stdout, "Caller %s: Number of accesses per level break down\n",
|
|
caller_to_string(caller.first).c_str());
|
|
for (auto naccess_level :
|
|
cf_caller_level_num_accesses_map[caller.first]) {
|
|
fprintf(stdout,
|
|
"\t Level %" PRIu64 ": Number of accesses: %" PRIu64 "\n",
|
|
naccess_level.first, naccess_level.second);
|
|
}
|
|
fprintf(stdout, "Caller %s: Number of accesses per file break down\n",
|
|
caller_to_string(caller.first).c_str());
|
|
for (auto naccess_file : cf_caller_file_num_accesses_map[caller.first]) {
|
|
fprintf(stdout,
|
|
"\t File %" PRIu64 ": Number of accesses: %" PRIu64 "\n",
|
|
naccess_file.first, naccess_file.second);
|
|
}
|
|
fprintf(stdout,
|
|
"Caller %s: Number of accesses per block type break down\n",
|
|
caller_to_string(caller.first).c_str());
|
|
for (auto naccess_type : cf_caller_bt_num_accesses_map[caller.first]) {
|
|
fprintf(stdout, "\t Block Type %s: Number of accesses: %" PRIu64 "\n",
|
|
block_type_to_string(naccess_type.first).c_str(),
|
|
naccess_type.second);
|
|
}
|
|
}
|
|
}
|
|
print_break_lines(/*num_break_lines=*/3);
|
|
fprintf(stdout, "Overall statistics:\n");
|
|
fprintf(stdout,
|
|
"Number of files: %" PRIu64 " Number of blocks: %" PRIu64
|
|
" Number of accesses: %" PRIu64 "\n",
|
|
total_num_files, total_num_blocks, total_num_accesses);
|
|
for (auto block_type : bt_num_blocks_map) {
|
|
fprintf(stdout, "Number of %s blocks: %" PRIu64 "\n",
|
|
block_type_to_string(block_type.first).c_str(), block_type.second);
|
|
}
|
|
for (auto caller : caller_num_access_map) {
|
|
print_break_lines(/*num_break_lines=*/1);
|
|
fprintf(stdout, "Caller %s: Number of accesses %" PRIu64 "\n",
|
|
caller_to_string(caller.first).c_str(), caller.second);
|
|
fprintf(stdout, "Caller %s: Number of accesses per level break down\n",
|
|
caller_to_string(caller.first).c_str());
|
|
for (auto naccess_level : caller_level_num_access_map[caller.first]) {
|
|
fprintf(stdout, "\t Level %d: Number of accesses: %" PRIu64 "\n",
|
|
naccess_level.first, naccess_level.second);
|
|
}
|
|
fprintf(stdout, "Caller %s: Number of accesses per block type break down\n",
|
|
caller_to_string(caller.first).c_str());
|
|
for (auto naccess_type : caller_bt_num_access_map[caller.first]) {
|
|
fprintf(stdout, "\t Block Type %s: Number of accesses: %" PRIu64 "\n",
|
|
block_type_to_string(naccess_type.first).c_str(),
|
|
naccess_type.second);
|
|
}
|
|
}
|
|
}
|
|
|
|
std::vector<CacheConfiguration> parse_cache_config_file(
|
|
const std::string& config_path) {
|
|
std::ifstream file(config_path);
|
|
if (!file.is_open()) {
|
|
return {};
|
|
}
|
|
std::vector<CacheConfiguration> configs;
|
|
std::string line;
|
|
while (getline(file, line)) {
|
|
CacheConfiguration cache_config;
|
|
std::stringstream ss(line);
|
|
std::vector<std::string> config_strs;
|
|
while (ss.good()) {
|
|
std::string substr;
|
|
getline(ss, substr, ',');
|
|
config_strs.push_back(substr);
|
|
}
|
|
// Sanity checks.
|
|
if (config_strs.size() < 3) {
|
|
fprintf(stderr, "Invalid cache simulator configuration %s\n",
|
|
line.c_str());
|
|
exit(1);
|
|
}
|
|
if (config_strs[0] != "lru") {
|
|
fprintf(stderr, "We only support LRU cache %s\n", line.c_str());
|
|
exit(1);
|
|
}
|
|
cache_config.cache_name = config_strs[0];
|
|
cache_config.num_shard_bits = ParseUint32(config_strs[1]);
|
|
for (uint32_t i = 2; i < config_strs.size(); i++) {
|
|
uint64_t capacity = ParseUint64(config_strs[i]);
|
|
if (capacity == 0) {
|
|
fprintf(stderr, "Invalid cache capacity %s, %s\n",
|
|
config_strs[i].c_str(), line.c_str());
|
|
exit(1);
|
|
}
|
|
cache_config.cache_capacities.push_back(capacity);
|
|
}
|
|
configs.push_back(cache_config);
|
|
}
|
|
file.close();
|
|
return configs;
|
|
}
|
|
|
|
int block_cache_trace_analyzer_tool(int argc, char** argv) {
|
|
ParseCommandLineFlags(&argc, &argv, true);
|
|
if (FLAGS_block_cache_trace_path.empty()) {
|
|
fprintf(stderr, "block cache trace path is empty\n");
|
|
exit(1);
|
|
}
|
|
uint64_t warmup_seconds =
|
|
FLAGS_cache_sim_warmup_seconds > 0 ? FLAGS_cache_sim_warmup_seconds : 0;
|
|
std::vector<CacheConfiguration> cache_configs =
|
|
parse_cache_config_file(FLAGS_block_cache_sim_config_path);
|
|
std::unique_ptr<BlockCacheTraceSimulator> cache_simulator;
|
|
if (!cache_configs.empty()) {
|
|
cache_simulator.reset(
|
|
new BlockCacheTraceSimulator(warmup_seconds, cache_configs));
|
|
}
|
|
BlockCacheTraceAnalyzer analyzer(FLAGS_block_cache_trace_path,
|
|
FLAGS_output_miss_ratio_curve_path,
|
|
std::move(cache_simulator));
|
|
Status s = analyzer.Analyze();
|
|
if (!s.IsIncomplete()) {
|
|
// Read all traces.
|
|
fprintf(stderr, "Cannot process the trace %s\n", s.ToString().c_str());
|
|
exit(1);
|
|
}
|
|
|
|
analyzer.PrintStatsSummary();
|
|
if (FLAGS_print_access_count_stats) {
|
|
print_break_lines(/*num_break_lines=*/3);
|
|
analyzer.PrintAccessCountStats();
|
|
}
|
|
if (FLAGS_print_block_size_stats) {
|
|
print_break_lines(/*num_break_lines=*/3);
|
|
analyzer.PrintBlockSizeStats();
|
|
}
|
|
if (FLAGS_print_data_block_access_count_stats) {
|
|
print_break_lines(/*num_break_lines=*/3);
|
|
analyzer.PrintDataBlockAccessStats();
|
|
}
|
|
print_break_lines(/*num_break_lines=*/3);
|
|
analyzer.PrintMissRatioCurves();
|
|
return 0;
|
|
}
|
|
|
|
} // namespace rocksdb
|
|
|
|
#endif // GFLAGS
|
|
#endif // ROCKSDB_LITE
|
|
|