354 lines
15 KiB
C++
354 lines
15 KiB
C++
// 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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#include "db/column_family.h"
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#include <vector>
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namespace rocksdb {
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DBPropertyType GetPropertyType(const Slice& property) {
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Slice in = property;
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Slice prefix("rocksdb.");
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if (!in.starts_with(prefix)) return kUnknown;
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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 == "sstables") {
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return kSsTables;
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} else 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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}
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return kUnknown;
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}
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bool InternalStats::GetProperty(DBPropertyType property_type,
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const Slice& property, std::string* value,
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ColumnFamilyData* cfd) {
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Version* current = cfd->current();
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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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current->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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current->NumLevelFiles(level),
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current->NumLevelBytes(level) / 1048576.0);
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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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char buf[1000];
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uint64_t wal_bytes = 0;
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uint64_t wal_synced = 0;
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uint64_t user_bytes_written = 0;
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uint64_t write_other = 0;
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uint64_t write_self = 0;
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uint64_t write_with_wal = 0;
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uint64_t total_bytes_written = 0;
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uint64_t total_bytes_read = 0;
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uint64_t micros_up = env_->NowMicros() - started_at_;
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// Add "+1" to make sure seconds_up is > 0 and avoid NaN later
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double seconds_up = (micros_up + 1) / 1000000.0;
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uint64_t total_slowdown = 0;
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uint64_t total_slowdown_count = 0;
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uint64_t interval_bytes_written = 0;
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uint64_t interval_bytes_read = 0;
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uint64_t interval_bytes_new = 0;
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double interval_seconds_up = 0;
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if (statistics_) {
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wal_bytes = statistics_->getTickerCount(WAL_FILE_BYTES);
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wal_synced = statistics_->getTickerCount(WAL_FILE_SYNCED);
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user_bytes_written = statistics_->getTickerCount(BYTES_WRITTEN);
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write_other = statistics_->getTickerCount(WRITE_DONE_BY_OTHER);
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write_self = statistics_->getTickerCount(WRITE_DONE_BY_SELF);
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write_with_wal = statistics_->getTickerCount(WRITE_WITH_WAL);
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}
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snprintf(
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buf, sizeof(buf),
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" Compactions\n"
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"Level Files Size(MB) Score Time(sec) Read(MB) Write(MB) Rn(MB) "
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" "
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"Rnp1(MB) Wnew(MB) RW-Amplify Read(MB/s) Write(MB/s) Rn "
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"Rnp1 "
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" Wnp1 NewW Count msComp msStall Ln-stall Stall-cnt\n"
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"--------------------------------------------------------------------"
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"--"
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"--------------------------------------------------------------------"
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"--"
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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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int files = current->NumLevelFiles(level);
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if (compaction_stats_[level].micros > 0 || files > 0) {
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int64_t bytes_read = compaction_stats_[level].bytes_readn +
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compaction_stats_[level].bytes_readnp1;
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int64_t bytes_new = compaction_stats_[level].bytes_written -
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compaction_stats_[level].bytes_readnp1;
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double amplify =
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(compaction_stats_[level].bytes_readn == 0)
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? 0.0
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: (compaction_stats_[level].bytes_written +
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compaction_stats_[level].bytes_readnp1 +
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compaction_stats_[level].bytes_readn) /
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(double)compaction_stats_[level].bytes_readn;
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total_bytes_read += bytes_read;
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total_bytes_written += compaction_stats_[level].bytes_written;
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uint64_t stalls = level == 0 ? (stall_counts_[LEVEL0_SLOWDOWN] +
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stall_counts_[LEVEL0_NUM_FILES] +
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stall_counts_[MEMTABLE_COMPACTION])
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: stall_leveln_slowdown_count_[level];
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double stall_us = level == 0 ? (stall_micros_[LEVEL0_SLOWDOWN] +
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stall_micros_[LEVEL0_NUM_FILES] +
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stall_micros_[MEMTABLE_COMPACTION])
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: stall_leveln_slowdown_[level];
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snprintf(buf, sizeof(buf),
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"%3d %8d %8.0f %5.1f %9.0f %9.0f %9.0f %9.0f %9.0f %9.0f "
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"%10.1f %9.1f %11.1f %8d %8d %8d %8d %8d %8d %9.1f %9.1f "
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"%9lu\n",
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level, files, current->NumLevelBytes(level) / 1048576.0,
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current->NumLevelBytes(level) /
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cfd->compaction_picker()->MaxBytesForLevel(level),
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compaction_stats_[level].micros / 1e6,
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bytes_read / 1048576.0,
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compaction_stats_[level].bytes_written / 1048576.0,
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compaction_stats_[level].bytes_readn / 1048576.0,
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compaction_stats_[level].bytes_readnp1 / 1048576.0,
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bytes_new / 1048576.0, amplify,
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// +1 to avoid division by 0
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(bytes_read / 1048576.0) /
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((compaction_stats_[level].micros + 1) / 1000000.0),
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(compaction_stats_[level].bytes_written / 1048576.0) /
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((compaction_stats_[level].micros + 1) / 1000000.0),
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compaction_stats_[level].files_in_leveln,
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compaction_stats_[level].files_in_levelnp1,
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compaction_stats_[level].files_out_levelnp1,
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compaction_stats_[level].files_out_levelnp1 -
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compaction_stats_[level].files_in_levelnp1,
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compaction_stats_[level].count,
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(int)((double)compaction_stats_[level].micros / 1000.0 /
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(compaction_stats_[level].count + 1)),
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(double)stall_us / 1000.0 / (stalls + 1),
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stall_us / 1000000.0, (unsigned long)stalls);
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total_slowdown += stall_leveln_slowdown_[level];
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total_slowdown_count += stall_leveln_slowdown_count_[level];
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value->append(buf);
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}
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}
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interval_bytes_new = user_bytes_written - last_stats_.ingest_bytes_;
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interval_bytes_read =
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total_bytes_read - last_stats_.compaction_bytes_read_;
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interval_bytes_written =
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total_bytes_written - last_stats_.compaction_bytes_written_;
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interval_seconds_up = seconds_up - last_stats_.seconds_up_;
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snprintf(buf, sizeof(buf), "Uptime(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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snprintf(buf, sizeof(buf),
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"Writes cumulative: %llu total, %llu batches, "
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"%.1f per batch, %.2f ingest GB\n",
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(unsigned long long)(write_other + write_self),
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(unsigned long long)write_self,
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(write_other + write_self) / (double)(write_self + 1),
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user_bytes_written / (1048576.0 * 1024));
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value->append(buf);
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snprintf(buf, sizeof(buf),
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"WAL cumulative: %llu WAL writes, %llu WAL syncs, "
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"%.2f writes per sync, %.2f GB written\n",
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(unsigned long long)write_with_wal,
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(unsigned long long)wal_synced,
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write_with_wal / (double)(wal_synced + 1),
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wal_bytes / (1048576.0 * 1024));
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value->append(buf);
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snprintf(buf, sizeof(buf),
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"Compaction IO cumulative (GB): "
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"%.2f new, %.2f read, %.2f write, %.2f read+write\n",
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user_bytes_written / (1048576.0 * 1024),
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total_bytes_read / (1048576.0 * 1024),
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total_bytes_written / (1048576.0 * 1024),
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(total_bytes_read + total_bytes_written) / (1048576.0 * 1024));
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value->append(buf);
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snprintf(
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buf, sizeof(buf),
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"Compaction IO cumulative (MB/sec): "
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"%.1f new, %.1f read, %.1f write, %.1f read+write\n",
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user_bytes_written / 1048576.0 / seconds_up,
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total_bytes_read / 1048576.0 / seconds_up,
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total_bytes_written / 1048576.0 / seconds_up,
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(total_bytes_read + total_bytes_written) / 1048576.0 / seconds_up);
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value->append(buf);
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// +1 to avoid divide by 0 and NaN
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snprintf(
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buf, sizeof(buf),
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"Amplification cumulative: %.1f write, %.1f compaction\n",
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(double)(total_bytes_written + wal_bytes) / (user_bytes_written + 1),
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(double)(total_bytes_written + total_bytes_read + wal_bytes) /
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(user_bytes_written + 1));
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value->append(buf);
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uint64_t interval_write_other = write_other - last_stats_.write_other_;
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uint64_t interval_write_self = write_self - last_stats_.write_self_;
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snprintf(buf, sizeof(buf),
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"Writes interval: %llu total, %llu batches, "
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"%.1f per batch, %.1f ingest MB\n",
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(unsigned long long)(interval_write_other + interval_write_self),
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(unsigned long long)interval_write_self,
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(double)(interval_write_other + interval_write_self) /
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(interval_write_self + 1),
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(user_bytes_written - last_stats_.ingest_bytes_) / 1048576.0);
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value->append(buf);
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uint64_t interval_write_with_wal =
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write_with_wal - last_stats_.write_with_wal_;
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uint64_t interval_wal_synced = wal_synced - last_stats_.wal_synced_;
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uint64_t interval_wal_bytes = wal_bytes - last_stats_.wal_bytes_;
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snprintf(buf, sizeof(buf),
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"WAL interval: %llu WAL writes, %llu WAL syncs, "
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"%.2f writes per sync, %.2f MB written\n",
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(unsigned long long)interval_write_with_wal,
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(unsigned long long)interval_wal_synced,
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interval_write_with_wal / (double)(interval_wal_synced + 1),
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interval_wal_bytes / (1048576.0 * 1024));
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value->append(buf);
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snprintf(buf, sizeof(buf),
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"Compaction IO interval (MB): "
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"%.2f new, %.2f read, %.2f write, %.2f read+write\n",
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interval_bytes_new / 1048576.0, interval_bytes_read / 1048576.0,
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interval_bytes_written / 1048576.0,
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(interval_bytes_read + interval_bytes_written) / 1048576.0);
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value->append(buf);
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snprintf(buf, sizeof(buf),
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"Compaction IO interval (MB/sec): "
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"%.1f new, %.1f read, %.1f write, %.1f read+write\n",
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interval_bytes_new / 1048576.0 / interval_seconds_up,
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interval_bytes_read / 1048576.0 / interval_seconds_up,
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interval_bytes_written / 1048576.0 / interval_seconds_up,
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(interval_bytes_read + interval_bytes_written) / 1048576.0 /
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interval_seconds_up);
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value->append(buf);
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// +1 to avoid divide by 0 and NaN
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snprintf(
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buf, sizeof(buf),
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"Amplification interval: %.1f write, %.1f compaction\n",
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(double)(interval_bytes_written + wal_bytes) /
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(interval_bytes_new + 1),
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(double)(interval_bytes_written + interval_bytes_read + wal_bytes) /
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(interval_bytes_new + 1));
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value->append(buf);
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snprintf(buf, sizeof(buf),
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"Stalls(secs): %.3f level0_slowdown, %.3f level0_numfiles, "
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"%.3f memtable_compaction, %.3f leveln_slowdown\n",
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stall_micros_[LEVEL0_SLOWDOWN] / 1000000.0,
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stall_micros_[LEVEL0_NUM_FILES] / 1000000.0,
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stall_micros_[MEMTABLE_COMPACTION] / 1000000.0,
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total_slowdown / 1000000.0);
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value->append(buf);
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snprintf(buf, sizeof(buf),
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"Stalls(count): %lu level0_slowdown, %lu level0_numfiles, "
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"%lu memtable_compaction, %lu leveln_slowdown\n",
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(unsigned long)stall_counts_[LEVEL0_SLOWDOWN],
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(unsigned long)stall_counts_[LEVEL0_NUM_FILES],
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(unsigned long)stall_counts_[MEMTABLE_COMPACTION],
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(unsigned long)total_slowdown_count);
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value->append(buf);
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last_stats_.compaction_bytes_read_ = total_bytes_read;
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last_stats_.compaction_bytes_written_ = total_bytes_written;
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last_stats_.ingest_bytes_ = user_bytes_written;
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last_stats_.seconds_up_ = seconds_up;
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last_stats_.wal_bytes_ = wal_bytes;
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last_stats_.wal_synced_ = wal_synced;
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last_stats_.write_with_wal_ = write_with_wal;
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last_stats_.write_other_ = write_other;
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last_stats_.write_self_ = write_self;
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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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case kNumImmutableMemTable:
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*value = std::to_string(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 = std::to_string(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 = std::to_string(current->NeedsCompaction() ? 1 : 0);
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return true;
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/////////////
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case kBackgroundErrors:
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// Accumulated number of errors in background flushes or compactions.
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*value = std::to_string(GetBackgroundErrorCount());
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return true;
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/////////
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default:
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return false;
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}
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}
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} // namespace rocksdb
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