fork of https://github.com/oxigraph/rocksdb and https://github.com/facebook/rocksdb for nextgraph and oxigraph
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507 lines
19 KiB
507 lines
19 KiB
// This source code is licensed under the BSD-style license found in the
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// LICENSE file in the root directory of this source tree. An additional grant
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// of patent rights can be found in the PATENTS file in the same directory.
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//
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// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file. See the AUTHORS file for names of contributors.
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#include "db/internal_stats.h"
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#ifndef __STDC_FORMAT_MACROS
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#define __STDC_FORMAT_MACROS
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#endif
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#include <inttypes.h>
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#include <vector>
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#include "db/column_family.h"
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#include "db/db_impl.h"
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namespace rocksdb {
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namespace {
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const double kMB = 1048576.0;
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const double kGB = kMB * 1024;
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void PrintLevelStatsHeader(char* buf, size_t len, const std::string& cf_name) {
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snprintf(
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buf, len,
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"\n** Compaction Stats [%s] **\n"
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"Level Files Size(MB) Score Read(GB) Rn(GB) Rnp1(GB) "
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"Write(GB) Wnew(GB) RW-Amp W-Amp Rd(MB/s) Wr(MB/s) Rn(cnt) "
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"Rnp1(cnt) Wnp1(cnt) Wnew(cnt) Comp(sec) Comp(cnt) Avg(sec) "
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"Stall(sec) Stall(cnt) Avg(ms) RecordIn RecordDrop\n"
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"--------------------------------------------------------------------"
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"--------------------------------------------------------------------"
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"--------------------------------------------------------------------\n",
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cf_name.c_str());
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}
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void PrintLevelStats(char* buf, size_t len, const std::string& name,
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int num_files, int being_compacted, double total_file_size, double score,
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double rw_amp, double w_amp, double stall_us, uint64_t stalls,
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const InternalStats::CompactionStats& stats) {
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uint64_t bytes_read = stats.bytes_readn + stats.bytes_readnp1;
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uint64_t bytes_new = stats.bytes_written - stats.bytes_readnp1;
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double elapsed = (stats.micros + 1) / 1000000.0;
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snprintf(buf, len,
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"%4s %5d/%-3d %8.0f %5.1f " /* Level, Files, Size(MB), Score */
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"%8.1f " /* Read(GB) */
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"%7.1f " /* Rn(GB) */
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"%8.1f " /* Rnp1(GB) */
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"%9.1f " /* Write(GB) */
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"%8.1f " /* Wnew(GB) */
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"%6.1f " /* RW-Amp */
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"%5.1f " /* W-Amp */
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"%8.1f " /* Rd(MB/s) */
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"%8.1f " /* Wr(MB/s) */
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"%8d " /* Rn(cnt) */
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"%9d " /* Rnp1(cnt) */
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"%9d " /* Wnp1(cnt) */
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"%9d " /* Wnew(cnt) */
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"%10.0f " /* Comp(sec) */
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"%9d " /* Comp(cnt) */
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"%8.3f " /* Avg(sec) */
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"%10.2f " /* Stall(sec) */
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"%10" PRIu64 " " /* Stall(cnt) */
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"%7.2f " /* Avg(ms) */
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"%12d " /* input entries */
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"%12d\n" /* number of records reduced */,
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name.c_str(), num_files, being_compacted, total_file_size / kMB, score,
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bytes_read / kGB,
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stats.bytes_readn / kGB,
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stats.bytes_readnp1 / kGB,
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stats.bytes_written / kGB,
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bytes_new / kGB,
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rw_amp,
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w_amp,
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bytes_read / kMB / elapsed,
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stats.bytes_written / kMB / elapsed,
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stats.files_in_leveln,
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stats.files_in_levelnp1,
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stats.files_out_levelnp1,
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stats.files_out_levelnp1 - stats.files_in_levelnp1,
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stats.micros / 1000000.0,
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stats.count,
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stats.count == 0 ? 0 : stats.micros / 1000000.0 / stats.count,
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stall_us / 1000000.0,
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stalls,
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stalls == 0 ? 0 : stall_us / 1000.0 / stalls,
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stats.num_input_records,
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stats.num_dropped_records);
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}
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}
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DBPropertyType GetPropertyType(const Slice& property, bool* is_int_property,
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bool* need_out_of_mutex) {
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assert(is_int_property != nullptr);
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assert(need_out_of_mutex != nullptr);
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Slice in = property;
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Slice prefix("rocksdb.");
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*need_out_of_mutex = false;
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*is_int_property = false;
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if (!in.starts_with(prefix)) {
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return kUnknown;
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}
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in.remove_prefix(prefix.size());
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if (in.starts_with("num-files-at-level")) {
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return kNumFilesAtLevel;
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} else if (in == "levelstats") {
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return kLevelStats;
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} else if (in == "stats") {
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return kStats;
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} else if (in == "cfstats") {
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return kCFStats;
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} else if (in == "dbstats") {
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return kDBStats;
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} else if (in == "sstables") {
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return kSsTables;
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}
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*is_int_property = true;
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if (in == "num-immutable-mem-table") {
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return kNumImmutableMemTable;
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} else if (in == "mem-table-flush-pending") {
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return kMemtableFlushPending;
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} else if (in == "compaction-pending") {
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return kCompactionPending;
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} else if (in == "background-errors") {
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return kBackgroundErrors;
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} else if (in == "cur-size-active-mem-table") {
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return kCurSizeActiveMemTable;
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} else if (in == "cur-size-all-mem-tables") {
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return kCurSizeAllMemTables;
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} else if (in == "num-entries-active-mem-table") {
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return kNumEntriesInMutableMemtable;
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} else if (in == "num-entries-imm-mem-tables") {
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return kNumEntriesInImmutableMemtable;
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} else if (in == "estimate-num-keys") {
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return kEstimatedNumKeys;
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} else if (in == "estimate-table-readers-mem") {
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*need_out_of_mutex = true;
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return kEstimatedUsageByTableReaders;
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} else if (in == "is-file-deletions-enabled") {
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return kIsFileDeletionEnabled;
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}
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return kUnknown;
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}
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bool InternalStats::GetIntPropertyOutOfMutex(DBPropertyType property_type,
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Version* version,
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uint64_t* value) const {
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assert(value != nullptr);
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if (property_type != kEstimatedUsageByTableReaders) {
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return false;
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}
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if (version == nullptr) {
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*value = 0;
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} else {
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*value = version->GetMemoryUsageByTableReaders();
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}
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return true;
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}
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bool InternalStats::GetStringProperty(DBPropertyType property_type,
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const Slice& property,
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std::string* value) {
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assert(value != nullptr);
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auto* current = cfd_->current();
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const auto* vstorage = current->storage_info();
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Slice in = property;
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switch (property_type) {
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case kNumFilesAtLevel: {
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in.remove_prefix(strlen("rocksdb.num-files-at-level"));
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uint64_t level;
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bool ok = ConsumeDecimalNumber(&in, &level) && in.empty();
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if (!ok || (int)level >= number_levels_) {
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return false;
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} else {
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char buf[100];
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snprintf(buf, sizeof(buf), "%d",
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vstorage->NumLevelFiles(static_cast<int>(level)));
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*value = buf;
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return true;
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}
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}
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case kLevelStats: {
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char buf[1000];
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snprintf(buf, sizeof(buf),
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"Level Files Size(MB)\n"
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"--------------------\n");
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value->append(buf);
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for (int level = 0; level < number_levels_; level++) {
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snprintf(buf, sizeof(buf), "%3d %8d %8.0f\n", level,
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vstorage->NumLevelFiles(level),
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vstorage->NumLevelBytes(level) / kMB);
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value->append(buf);
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}
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return true;
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}
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case kStats: {
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if (!GetStringProperty(kCFStats, "rocksdb.cfstats", value)) {
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return false;
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}
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if (!GetStringProperty(kDBStats, "rocksdb.dbstats", value)) {
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return false;
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}
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return true;
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}
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case kCFStats: {
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DumpCFStats(value);
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return true;
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}
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case kDBStats: {
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DumpDBStats(value);
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return true;
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}
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case kSsTables:
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*value = current->DebugString();
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return true;
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default:
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return false;
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}
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}
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bool InternalStats::GetIntProperty(DBPropertyType property_type,
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uint64_t* value, DBImpl* db) const {
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const auto* vstorage = cfd_->current()->storage_info();
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switch (property_type) {
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case kNumImmutableMemTable:
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*value = cfd_->imm()->size();
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return true;
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case kMemtableFlushPending:
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// Return number of mem tables that are ready to flush (made immutable)
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*value = (cfd_->imm()->IsFlushPending() ? 1 : 0);
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return true;
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case kCompactionPending:
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// 1 if the system already determines at least one compacdtion is needed.
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// 0 otherwise,
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*value = (vstorage->NeedsCompaction() ? 1 : 0);
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return true;
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case kBackgroundErrors:
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// Accumulated number of errors in background flushes or compactions.
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*value = GetBackgroundErrorCount();
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return true;
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case kCurSizeActiveMemTable:
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// Current size of the active memtable
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*value = cfd_->mem()->ApproximateMemoryUsage();
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return true;
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case kCurSizeAllMemTables:
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// Current size of the active memtable + immutable memtables
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*value = cfd_->mem()->ApproximateMemoryUsage() +
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cfd_->imm()->ApproximateMemoryUsage();
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return true;
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case kNumEntriesInMutableMemtable:
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// Current number of entires in the active memtable
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*value = cfd_->mem()->GetNumEntries();
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return true;
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case kNumEntriesInImmutableMemtable:
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// Current number of entries in the immutable memtables
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*value = cfd_->imm()->current()->GetTotalNumEntries();
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return true;
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case kEstimatedNumKeys:
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// Estimate number of entries in the column family:
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// Use estimated entries in tables + total entries in memtables.
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*value = cfd_->mem()->GetNumEntries() +
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cfd_->imm()->current()->GetTotalNumEntries() +
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vstorage->GetEstimatedActiveKeys();
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return true;
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#ifndef ROCKSDB_LITE
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case kIsFileDeletionEnabled:
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*value = db->IsFileDeletionsEnabled();
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return true;
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#endif
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default:
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return false;
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}
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}
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void InternalStats::DumpDBStats(std::string* value) {
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char buf[1000];
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// DB-level stats, only available from default column family
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double seconds_up = (env_->NowMicros() - started_at_ + 1) / 1000000.0;
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double interval_seconds_up = seconds_up - db_stats_snapshot_.seconds_up;
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snprintf(buf, sizeof(buf),
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"\n** DB Stats **\nUptime(secs): %.1f total, %.1f interval\n",
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seconds_up, interval_seconds_up);
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value->append(buf);
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// Cumulative
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uint64_t user_bytes_written = db_stats_[InternalStats::BYTES_WRITTEN];
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uint64_t num_keys_written = db_stats_[InternalStats::NUMBER_KEYS_WRITTEN];
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uint64_t write_other = db_stats_[InternalStats::WRITE_DONE_BY_OTHER];
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uint64_t write_self = db_stats_[InternalStats::WRITE_DONE_BY_SELF];
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uint64_t wal_bytes = db_stats_[InternalStats::WAL_FILE_BYTES];
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uint64_t wal_synced = db_stats_[InternalStats::WAL_FILE_SYNCED];
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uint64_t write_with_wal = db_stats_[InternalStats::WRITE_WITH_WAL];
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// Data
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// writes: total number of write requests.
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// keys: total number of key updates issued by all the write requests
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// batches: number of group commits issued to the DB. Each group can contain
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// one or more writes.
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// so writes/keys is the average number of put in multi-put or put
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// writes/batches is the average group commit size.
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//
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// The format is the same for interval stats.
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snprintf(buf, sizeof(buf),
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"Cumulative writes: %" PRIu64 " writes, %" PRIu64 " keys, %" PRIu64
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" batches, %.1f writes per batch, %.2f GB user ingest\n",
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write_other + write_self, num_keys_written, write_self,
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(write_other + write_self) / static_cast<double>(write_self + 1),
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user_bytes_written / kGB);
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value->append(buf);
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// WAL
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snprintf(buf, sizeof(buf),
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"Cumulative WAL: %" PRIu64 " writes, %" PRIu64 " syncs, "
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"%.2f writes per sync, %.2f GB written\n",
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write_with_wal, wal_synced,
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write_with_wal / static_cast<double>(wal_synced + 1),
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wal_bytes / kGB);
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value->append(buf);
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// Interval
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uint64_t interval_write_other = write_other - db_stats_snapshot_.write_other;
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uint64_t interval_write_self = write_self - db_stats_snapshot_.write_self;
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uint64_t interval_num_keys_written =
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num_keys_written - db_stats_snapshot_.num_keys_written;
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snprintf(buf, sizeof(buf),
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"Interval writes: %" PRIu64 " writes, %" PRIu64 " keys, %" PRIu64
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" batches, %.1f writes per batch, %.1f MB user ingest\n",
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interval_write_other + interval_write_self,
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interval_num_keys_written, interval_write_self,
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static_cast<double>(interval_write_other + interval_write_self) /
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(interval_write_self + 1),
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(user_bytes_written - db_stats_snapshot_.ingest_bytes) / kMB);
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value->append(buf);
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uint64_t interval_write_with_wal =
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write_with_wal - db_stats_snapshot_.write_with_wal;
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uint64_t interval_wal_synced = wal_synced - db_stats_snapshot_.wal_synced;
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uint64_t interval_wal_bytes = wal_bytes - db_stats_snapshot_.wal_bytes;
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snprintf(buf, sizeof(buf),
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"Interval WAL: %" PRIu64 " writes, %" PRIu64 " syncs, "
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"%.2f writes per sync, %.2f MB written\n",
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interval_write_with_wal,
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interval_wal_synced,
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interval_write_with_wal /
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static_cast<double>(interval_wal_synced + 1),
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interval_wal_bytes / kGB);
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value->append(buf);
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db_stats_snapshot_.seconds_up = seconds_up;
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db_stats_snapshot_.ingest_bytes = user_bytes_written;
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db_stats_snapshot_.write_other = write_other;
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db_stats_snapshot_.write_self = write_self;
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db_stats_snapshot_.num_keys_written = num_keys_written;
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db_stats_snapshot_.wal_bytes = wal_bytes;
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db_stats_snapshot_.wal_synced = wal_synced;
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db_stats_snapshot_.write_with_wal = write_with_wal;
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}
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void InternalStats::DumpCFStats(std::string* value) {
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const VersionStorageInfo* vstorage = cfd_->current()->storage_info();
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int num_levels_to_check =
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(cfd_->options()->compaction_style != kCompactionStyleUniversal &&
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cfd_->options()->compaction_style != kCompactionStyleFIFO)
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? vstorage->NumberLevels() - 1
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: 1;
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// Compaction scores are sorted base on its value. Restore them to the
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// level order
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std::vector<double> compaction_score(number_levels_, 0);
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for (int i = 0; i < num_levels_to_check; ++i) {
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compaction_score[vstorage->CompactionScoreLevel(i)] =
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vstorage->CompactionScore(i);
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}
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// Count # of files being compacted for each level
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std::vector<int> files_being_compacted(number_levels_, 0);
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for (int level = 0; level < num_levels_to_check; ++level) {
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for (auto* f : vstorage->LevelFiles(level)) {
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if (f->being_compacted) {
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++files_being_compacted[level];
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}
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}
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}
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char buf[1000];
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// Per-ColumnFamily stats
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PrintLevelStatsHeader(buf, sizeof(buf), cfd_->GetName());
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value->append(buf);
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CompactionStats stats_sum(0);
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int total_files = 0;
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int total_files_being_compacted = 0;
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double total_file_size = 0;
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uint64_t total_slowdown_soft = 0;
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uint64_t total_slowdown_count_soft = 0;
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uint64_t total_slowdown_hard = 0;
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uint64_t total_slowdown_count_hard = 0;
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uint64_t total_stall_count = 0;
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double total_stall_us = 0;
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for (int level = 0; level < number_levels_; level++) {
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int files = vstorage->NumLevelFiles(level);
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total_files += files;
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total_files_being_compacted += files_being_compacted[level];
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if (comp_stats_[level].micros > 0 || files > 0) {
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uint64_t stalls = level == 0 ?
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(cf_stats_count_[LEVEL0_SLOWDOWN] +
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cf_stats_count_[LEVEL0_NUM_FILES] +
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cf_stats_count_[MEMTABLE_COMPACTION])
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: (stall_leveln_slowdown_count_soft_[level] +
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stall_leveln_slowdown_count_hard_[level]);
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double stall_us = level == 0 ?
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(cf_stats_value_[LEVEL0_SLOWDOWN] +
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cf_stats_value_[LEVEL0_NUM_FILES] +
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cf_stats_value_[MEMTABLE_COMPACTION])
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: (stall_leveln_slowdown_soft_[level] +
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stall_leveln_slowdown_hard_[level]);
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stats_sum.Add(comp_stats_[level]);
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total_file_size += vstorage->NumLevelBytes(level);
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total_stall_us += stall_us;
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total_stall_count += stalls;
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total_slowdown_soft += stall_leveln_slowdown_soft_[level];
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total_slowdown_count_soft += stall_leveln_slowdown_count_soft_[level];
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total_slowdown_hard += stall_leveln_slowdown_hard_[level];
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total_slowdown_count_hard += stall_leveln_slowdown_count_hard_[level];
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int64_t bytes_read = comp_stats_[level].bytes_readn +
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comp_stats_[level].bytes_readnp1;
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double rw_amp = (comp_stats_[level].bytes_readn == 0) ? 0.0
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: (comp_stats_[level].bytes_written + bytes_read) /
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static_cast<double>(comp_stats_[level].bytes_readn);
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double w_amp = (comp_stats_[level].bytes_readn == 0) ? 0.0
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: comp_stats_[level].bytes_written /
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static_cast<double>(comp_stats_[level].bytes_readn);
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PrintLevelStats(buf, sizeof(buf), "L" + std::to_string(level), files,
|
|
files_being_compacted[level],
|
|
vstorage->NumLevelBytes(level), compaction_score[level],
|
|
rw_amp, w_amp, stall_us, stalls, comp_stats_[level]);
|
|
value->append(buf);
|
|
}
|
|
}
|
|
uint64_t curr_ingest = cf_stats_value_[BYTES_FLUSHED];
|
|
// Cumulative summary
|
|
double rw_amp = (stats_sum.bytes_written + stats_sum.bytes_readn +
|
|
stats_sum.bytes_readnp1) / static_cast<double>(curr_ingest + 1);
|
|
double w_amp = stats_sum.bytes_written / static_cast<double>(curr_ingest + 1);
|
|
// Stats summary across levels
|
|
PrintLevelStats(buf, sizeof(buf), "Sum", total_files,
|
|
total_files_being_compacted, total_file_size, 0, rw_amp, w_amp,
|
|
total_stall_us, total_stall_count, stats_sum);
|
|
value->append(buf);
|
|
// Interval summary
|
|
uint64_t interval_ingest =
|
|
curr_ingest - cf_stats_snapshot_.ingest_bytes + 1;
|
|
CompactionStats interval_stats(stats_sum);
|
|
interval_stats.Subtract(cf_stats_snapshot_.comp_stats);
|
|
rw_amp = (interval_stats.bytes_written +
|
|
interval_stats.bytes_readn + interval_stats.bytes_readnp1) /
|
|
static_cast<double>(interval_ingest);
|
|
w_amp = interval_stats.bytes_written / static_cast<double>(interval_ingest);
|
|
PrintLevelStats(buf, sizeof(buf), "Int", 0, 0, 0, 0,
|
|
rw_amp, w_amp, total_stall_us - cf_stats_snapshot_.stall_us,
|
|
total_stall_count - cf_stats_snapshot_.stall_count, interval_stats);
|
|
value->append(buf);
|
|
|
|
snprintf(buf, sizeof(buf),
|
|
"Flush(GB): accumulative %.3f, interval %.3f\n",
|
|
curr_ingest / kGB, interval_ingest / kGB);
|
|
value->append(buf);
|
|
snprintf(buf, sizeof(buf),
|
|
"Stalls(secs): %.3f level0_slowdown, %.3f level0_numfiles, "
|
|
"%.3f memtable_compaction, %.3f leveln_slowdown_soft, "
|
|
"%.3f leveln_slowdown_hard\n",
|
|
cf_stats_value_[LEVEL0_SLOWDOWN] / 1000000.0,
|
|
cf_stats_value_[LEVEL0_NUM_FILES] / 1000000.0,
|
|
cf_stats_value_[MEMTABLE_COMPACTION] / 1000000.0,
|
|
total_slowdown_soft / 1000000.0,
|
|
total_slowdown_hard / 1000000.0);
|
|
value->append(buf);
|
|
|
|
snprintf(buf, sizeof(buf),
|
|
"Stalls(count): %" PRIu64 " level0_slowdown, "
|
|
"%" PRIu64 " level0_numfiles, %" PRIu64 " memtable_compaction, "
|
|
"%" PRIu64 " leveln_slowdown_soft, "
|
|
"%" PRIu64 " leveln_slowdown_hard\n",
|
|
cf_stats_count_[LEVEL0_SLOWDOWN],
|
|
cf_stats_count_[LEVEL0_NUM_FILES],
|
|
cf_stats_count_[MEMTABLE_COMPACTION],
|
|
total_slowdown_count_soft, total_slowdown_count_hard);
|
|
value->append(buf);
|
|
|
|
cf_stats_snapshot_.ingest_bytes = curr_ingest;
|
|
cf_stats_snapshot_.comp_stats = stats_sum;
|
|
cf_stats_snapshot_.stall_us = total_stall_us;
|
|
cf_stats_snapshot_.stall_count = total_stall_count;
|
|
}
|
|
|
|
} // namespace rocksdb
|
|
|