mirror of
https://github.com/facebook/rocksdb.git
synced 2024-11-26 16:30:56 +00:00
418 lines
16 KiB
C++
418 lines
16 KiB
C++
// This source code is licensed under the BSD-style license found in the
|
|
// LICENSE file in the root directory of this source tree. An additional grant
|
|
// of patent rights can be found in the PATENTS file in the same directory.
|
|
//
|
|
// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style license that can be
|
|
// found in the LICENSE file. See the AUTHORS file for names of contributors.
|
|
|
|
#include "db/internal_stats.h"
|
|
|
|
#define __STDC_FORMAT_MACROS
|
|
#include <inttypes.h>
|
|
#include <vector>
|
|
|
|
#include "db/column_family.h"
|
|
|
|
namespace rocksdb {
|
|
|
|
namespace {
|
|
const double kMB = 1048576.0;
|
|
const double kGB = kMB * 1024;
|
|
|
|
void PrintLevelStatsHeader(char* buf, size_t len) {
|
|
snprintf(
|
|
buf, len,
|
|
"\n** Compaction Stats **\n"
|
|
"Level Files Size(MB) Score Read(GB) Rn(GB) Rnp1(GB) "
|
|
"Write(GB) Wnew(GB) RW-Amp W-Amp Rd(MB/s) Wr(MB/s) Rn(cnt) "
|
|
"Rnp1(cnt) Wnp1(cnt) Wnew(cnt) Comp(sec) Comp(cnt) Avg(sec) "
|
|
"Stall(sec) Stall(cnt) Avg(ms)\n"
|
|
"--------------------------------------------------------------------"
|
|
"--------------------------------------------------------------------"
|
|
"--------------------------------------------------------------------\n");
|
|
}
|
|
|
|
void PrintLevelStats(char* buf, size_t len, const std::string& name,
|
|
int num_files, double total_file_size, double score,
|
|
double stall_us, uint64_t stalls,
|
|
const InternalStats::CompactionStats& stats) {
|
|
int64_t bytes_read = stats.bytes_readn + stats.bytes_readnp1;
|
|
int64_t bytes_new = stats.bytes_written - stats.bytes_readnp1;
|
|
double rw_amp = (stats.bytes_readn== 0) ? 0.0
|
|
: (stats.bytes_written + bytes_read) / (double)stats.bytes_readn;
|
|
double w_amp = (stats.bytes_readn == 0) ? 0.0
|
|
: stats.bytes_written / (double)stats.bytes_readn;
|
|
double elapsed = (stats.micros + 1) / 1000000.0;
|
|
|
|
snprintf(buf, len,
|
|
"%4s %5d %8.0f %5.1f " /* Level, Files, Size(MB), Score */
|
|
"%8.1f " /* Read(GB) */
|
|
"%7.1f " /* Rn(GB) */
|
|
"%8.1f " /* Rnp1(GB) */
|
|
"%9.1f " /* Write(GB) */
|
|
"%8.1f " /* Wnew(GB) */
|
|
"%6.1f " /* RW-Amp */
|
|
"%5.1f " /* W-Amp */
|
|
"%8.1f " /* Rd(MB/s) */
|
|
"%8.1f " /* Wr(MB/s) */
|
|
"%8d " /* Rn(cnt) */
|
|
"%9d " /* Rnp1(cnt) */
|
|
"%9d " /* Wnp1(cnt) */
|
|
"%9d " /* Wnew(cnt) */
|
|
"%10.0f " /* Comp(sec) */
|
|
"%9d " /* Comp(cnt) */
|
|
"%8.3f " /* Avg(sec) */
|
|
"%10.2f " /* Sta(sec) */
|
|
"%10" PRIu64 " " /* Sta(cnt) */
|
|
"%7.2f\n" /* Avg(ms) */,
|
|
name.c_str(), num_files, total_file_size / kMB, score,
|
|
bytes_read / kGB,
|
|
stats.bytes_readn / kGB,
|
|
stats.bytes_readnp1 / kGB,
|
|
stats.bytes_written / kGB,
|
|
bytes_new / kGB,
|
|
rw_amp,
|
|
w_amp,
|
|
bytes_read / kMB / elapsed,
|
|
stats.bytes_written / kMB / elapsed,
|
|
stats.files_in_leveln,
|
|
stats.files_in_levelnp1,
|
|
stats.files_out_levelnp1,
|
|
stats.files_out_levelnp1 - stats.files_in_levelnp1,
|
|
stats.micros / 1000000.0,
|
|
stats.count,
|
|
stats.count == 0 ? 0 : stats.micros / 1000000.0 / stats.count,
|
|
stall_us / 1000000.0,
|
|
stalls,
|
|
stalls == 0 ? 0 : stall_us / 1000.0 / stalls);
|
|
}
|
|
|
|
}
|
|
|
|
DBPropertyType GetPropertyType(const Slice& property) {
|
|
Slice in = property;
|
|
Slice prefix("rocksdb.");
|
|
if (!in.starts_with(prefix)) return kUnknown;
|
|
in.remove_prefix(prefix.size());
|
|
|
|
if (in.starts_with("num-files-at-level")) {
|
|
return kNumFilesAtLevel;
|
|
} else if (in == "levelstats") {
|
|
return kLevelStats;
|
|
} else if (in == "stats") {
|
|
return kStats;
|
|
} else if (in == "sstables") {
|
|
return kSsTables;
|
|
} else if (in == "num-immutable-mem-table") {
|
|
return kNumImmutableMemTable;
|
|
} else if (in == "mem-table-flush-pending") {
|
|
return kMemtableFlushPending;
|
|
} else if (in == "compaction-pending") {
|
|
return kCompactionPending;
|
|
} else if (in == "background-errors") {
|
|
return kBackgroundErrors;
|
|
} else if (in == "cur-size-active-mem-table") {
|
|
return kCurSizeActiveMemTable;
|
|
} else if (in == "num-entries-active-mem-table") {
|
|
return kNumEntriesInMutableMemtable;
|
|
} else if (in == "num-entries-imm-mem-tables") {
|
|
return kNumEntriesInImmutableMemtable;
|
|
}
|
|
return kUnknown;
|
|
}
|
|
|
|
bool InternalStats::GetProperty(DBPropertyType property_type,
|
|
const Slice& property, std::string* value,
|
|
ColumnFamilyData* cfd) {
|
|
Version* current = cfd->current();
|
|
Slice in = property;
|
|
|
|
switch (property_type) {
|
|
case kNumFilesAtLevel: {
|
|
in.remove_prefix(strlen("rocksdb.num-files-at-level"));
|
|
uint64_t level;
|
|
bool ok = ConsumeDecimalNumber(&in, &level) && in.empty();
|
|
if (!ok || (int)level >= number_levels_) {
|
|
return false;
|
|
} else {
|
|
char buf[100];
|
|
snprintf(buf, sizeof(buf), "%d",
|
|
current->NumLevelFiles(static_cast<int>(level)));
|
|
*value = buf;
|
|
return true;
|
|
}
|
|
}
|
|
case kLevelStats: {
|
|
char buf[1000];
|
|
snprintf(buf, sizeof(buf),
|
|
"Level Files Size(MB)\n"
|
|
"--------------------\n");
|
|
value->append(buf);
|
|
|
|
for (int level = 0; level < number_levels_; level++) {
|
|
snprintf(buf, sizeof(buf), "%3d %8d %8.0f\n", level,
|
|
current->NumLevelFiles(level),
|
|
current->NumLevelBytes(level) / kMB);
|
|
value->append(buf);
|
|
}
|
|
return true;
|
|
}
|
|
case kStats: {
|
|
char buf[1000];
|
|
|
|
uint64_t wal_bytes = 0;
|
|
uint64_t wal_synced = 0;
|
|
uint64_t user_bytes_written = 0;
|
|
uint64_t write_other = 0;
|
|
uint64_t write_self = 0;
|
|
uint64_t write_with_wal = 0;
|
|
uint64_t micros_up = env_->NowMicros() - started_at_;
|
|
// Add "+1" to make sure seconds_up is > 0 and avoid NaN later
|
|
double seconds_up = (micros_up + 1) / 1000000.0;
|
|
uint64_t total_slowdown = 0;
|
|
uint64_t total_slowdown_count = 0;
|
|
uint64_t interval_bytes_written = 0;
|
|
uint64_t interval_bytes_read = 0;
|
|
uint64_t interval_bytes_new = 0;
|
|
double interval_seconds_up = 0;
|
|
|
|
if (statistics_) {
|
|
wal_bytes = statistics_->getTickerCount(WAL_FILE_BYTES);
|
|
wal_synced = statistics_->getTickerCount(WAL_FILE_SYNCED);
|
|
user_bytes_written = statistics_->getTickerCount(BYTES_WRITTEN);
|
|
write_other = statistics_->getTickerCount(WRITE_DONE_BY_OTHER);
|
|
write_self = statistics_->getTickerCount(WRITE_DONE_BY_SELF);
|
|
write_with_wal = statistics_->getTickerCount(WRITE_WITH_WAL);
|
|
}
|
|
|
|
PrintLevelStatsHeader(buf, sizeof(buf));
|
|
value->append(buf);
|
|
|
|
CompactionStats stats_total(0);
|
|
int total_files = 0;
|
|
double total_file_size = 0;
|
|
uint64_t total_stalls = 0;
|
|
double total_stall_us = 0;
|
|
int level_printed = 0;
|
|
for (int level = 0; level < number_levels_; level++) {
|
|
int files = current->NumLevelFiles(level);
|
|
total_files += files;
|
|
if (stats_[level].micros > 0 || files > 0) {
|
|
++level_printed;
|
|
uint64_t stalls = level == 0 ? (stall_counts_[LEVEL0_SLOWDOWN] +
|
|
stall_counts_[LEVEL0_NUM_FILES] +
|
|
stall_counts_[MEMTABLE_COMPACTION])
|
|
: stall_leveln_slowdown_count_[level];
|
|
|
|
double stall_us = level == 0 ? (stall_micros_[LEVEL0_SLOWDOWN] +
|
|
stall_micros_[LEVEL0_NUM_FILES] +
|
|
stall_micros_[MEMTABLE_COMPACTION])
|
|
: stall_leveln_slowdown_[level];
|
|
|
|
stats_total.Add(stats_[level]);
|
|
total_file_size += current->NumLevelBytes(level);
|
|
total_stall_us += stall_us;
|
|
total_stalls += stalls;
|
|
total_slowdown += stall_leveln_slowdown_[level];
|
|
total_slowdown_count += stall_leveln_slowdown_count_[level];
|
|
double score = current->NumLevelBytes(level) /
|
|
cfd->compaction_picker()->MaxBytesForLevel(level);
|
|
PrintLevelStats(buf, sizeof(buf), "L" + std::to_string(level), files,
|
|
current->NumLevelBytes(level), score, stall_us, stalls,
|
|
stats_[level]);
|
|
value->append(buf);
|
|
}
|
|
}
|
|
// Stats summary across levels
|
|
if (level_printed > 1) {
|
|
PrintLevelStats(buf, sizeof(buf), "Sum", total_files, total_file_size,
|
|
0, total_stall_us, total_stalls, stats_total);
|
|
value->append(buf);
|
|
}
|
|
|
|
uint64_t total_bytes_read =
|
|
stats_total.bytes_readn + stats_total.bytes_readnp1;
|
|
uint64_t total_bytes_written = stats_total.bytes_written;
|
|
|
|
interval_bytes_new = user_bytes_written - last_stats_.ingest_bytes_;
|
|
interval_bytes_read =
|
|
total_bytes_read - last_stats_.compaction_bytes_read_;
|
|
interval_bytes_written =
|
|
total_bytes_written - last_stats_.compaction_bytes_written_;
|
|
interval_seconds_up = seconds_up - last_stats_.seconds_up_;
|
|
|
|
snprintf(buf, sizeof(buf), "\nUptime(secs): %.1f total, %.1f interval\n",
|
|
seconds_up, interval_seconds_up);
|
|
value->append(buf);
|
|
|
|
snprintf(buf, sizeof(buf),
|
|
"Writes cumulative: %llu total, %llu batches, "
|
|
"%.1f per batch, %.2f ingest GB\n",
|
|
(unsigned long long)(write_other + write_self),
|
|
(unsigned long long)write_self,
|
|
(write_other + write_self) / (double)(write_self + 1),
|
|
user_bytes_written / kGB);
|
|
value->append(buf);
|
|
|
|
snprintf(buf, sizeof(buf),
|
|
"WAL cumulative: %llu WAL writes, %llu WAL syncs, "
|
|
"%.2f writes per sync, %.2f GB written\n",
|
|
(unsigned long long)write_with_wal,
|
|
(unsigned long long)wal_synced,
|
|
write_with_wal / (double)(wal_synced + 1),
|
|
wal_bytes / kGB);
|
|
value->append(buf);
|
|
|
|
snprintf(buf, sizeof(buf),
|
|
"Compaction IO cumulative (GB): "
|
|
"%.2f new, %.2f read, %.2f write, %.2f read+write\n",
|
|
user_bytes_written / kGB,
|
|
total_bytes_read / kGB,
|
|
total_bytes_written / kGB,
|
|
(total_bytes_read + total_bytes_written) / kGB);
|
|
value->append(buf);
|
|
|
|
snprintf(
|
|
buf, sizeof(buf),
|
|
"Compaction IO cumulative (MB/sec): "
|
|
"%.1f new, %.1f read, %.1f write, %.1f read+write\n",
|
|
user_bytes_written / kMB / seconds_up,
|
|
total_bytes_read / kMB / seconds_up,
|
|
total_bytes_written / kMB / seconds_up,
|
|
(total_bytes_read + total_bytes_written) / kMB / seconds_up);
|
|
value->append(buf);
|
|
|
|
// +1 to avoid divide by 0 and NaN
|
|
snprintf(
|
|
buf, sizeof(buf),
|
|
"Amplification cumulative: %.1f write, %.1f compaction\n",
|
|
(double)(total_bytes_written + wal_bytes) / (user_bytes_written + 1),
|
|
(double)(total_bytes_written + total_bytes_read + wal_bytes) /
|
|
(user_bytes_written + 1));
|
|
value->append(buf);
|
|
|
|
uint64_t interval_write_other = write_other - last_stats_.write_other_;
|
|
uint64_t interval_write_self = write_self - last_stats_.write_self_;
|
|
|
|
snprintf(buf, sizeof(buf),
|
|
"Writes interval: %llu total, %llu batches, "
|
|
"%.1f per batch, %.1f ingest MB\n",
|
|
(unsigned long long)(interval_write_other + interval_write_self),
|
|
(unsigned long long)interval_write_self,
|
|
(double)(interval_write_other + interval_write_self) /
|
|
(interval_write_self + 1),
|
|
(user_bytes_written - last_stats_.ingest_bytes_) / kMB);
|
|
value->append(buf);
|
|
|
|
uint64_t interval_write_with_wal =
|
|
write_with_wal - last_stats_.write_with_wal_;
|
|
|
|
uint64_t interval_wal_synced = wal_synced - last_stats_.wal_synced_;
|
|
uint64_t interval_wal_bytes = wal_bytes - last_stats_.wal_bytes_;
|
|
|
|
snprintf(buf, sizeof(buf),
|
|
"WAL interval: %llu WAL writes, %llu WAL syncs, "
|
|
"%.2f writes per sync, %.2f MB written\n",
|
|
(unsigned long long)interval_write_with_wal,
|
|
(unsigned long long)interval_wal_synced,
|
|
interval_write_with_wal / (double)(interval_wal_synced + 1),
|
|
interval_wal_bytes / kGB);
|
|
value->append(buf);
|
|
|
|
snprintf(buf, sizeof(buf),
|
|
"Compaction IO interval (MB): "
|
|
"%.2f new, %.2f read, %.2f write, %.2f read+write\n",
|
|
interval_bytes_new / kMB, interval_bytes_read / kMB,
|
|
interval_bytes_written / kMB,
|
|
(interval_bytes_read + interval_bytes_written) / kMB);
|
|
value->append(buf);
|
|
|
|
snprintf(buf, sizeof(buf),
|
|
"Compaction IO interval (MB/sec): "
|
|
"%.1f new, %.1f read, %.1f write, %.1f read+write\n",
|
|
interval_bytes_new / kMB / interval_seconds_up,
|
|
interval_bytes_read / kMB / interval_seconds_up,
|
|
interval_bytes_written / kMB / interval_seconds_up,
|
|
(interval_bytes_read + interval_bytes_written) / kMB /
|
|
interval_seconds_up);
|
|
value->append(buf);
|
|
|
|
// +1 to avoid divide by 0 and NaN
|
|
snprintf(
|
|
buf, sizeof(buf),
|
|
"Amplification interval: %.1f write, %.1f compaction\n",
|
|
(double)(interval_bytes_written + interval_wal_bytes) /
|
|
(interval_bytes_new + 1),
|
|
(double)(interval_bytes_written + interval_bytes_read + interval_wal_bytes) /
|
|
(interval_bytes_new + 1));
|
|
value->append(buf);
|
|
|
|
snprintf(buf, sizeof(buf),
|
|
"Stalls(secs): %.3f level0_slowdown, %.3f level0_numfiles, "
|
|
"%.3f memtable_compaction, %.3f leveln_slowdown\n",
|
|
stall_micros_[LEVEL0_SLOWDOWN] / 1000000.0,
|
|
stall_micros_[LEVEL0_NUM_FILES] / 1000000.0,
|
|
stall_micros_[MEMTABLE_COMPACTION] / 1000000.0,
|
|
total_slowdown / 1000000.0);
|
|
value->append(buf);
|
|
|
|
snprintf(buf, sizeof(buf),
|
|
"Stalls(count): %lu level0_slowdown, %lu level0_numfiles, "
|
|
"%lu memtable_compaction, %lu leveln_slowdown\n",
|
|
(unsigned long)stall_counts_[LEVEL0_SLOWDOWN],
|
|
(unsigned long)stall_counts_[LEVEL0_NUM_FILES],
|
|
(unsigned long)stall_counts_[MEMTABLE_COMPACTION],
|
|
(unsigned long)total_slowdown_count);
|
|
value->append(buf);
|
|
|
|
last_stats_.compaction_bytes_read_ = total_bytes_read;
|
|
last_stats_.compaction_bytes_written_ = total_bytes_written;
|
|
last_stats_.ingest_bytes_ = user_bytes_written;
|
|
last_stats_.seconds_up_ = seconds_up;
|
|
last_stats_.wal_bytes_ = wal_bytes;
|
|
last_stats_.wal_synced_ = wal_synced;
|
|
last_stats_.write_with_wal_ = write_with_wal;
|
|
last_stats_.write_other_ = write_other;
|
|
last_stats_.write_self_ = write_self;
|
|
|
|
return true;
|
|
}
|
|
case kSsTables:
|
|
*value = current->DebugString();
|
|
return true;
|
|
case kNumImmutableMemTable:
|
|
*value = std::to_string(cfd->imm()->size());
|
|
return true;
|
|
case kMemtableFlushPending:
|
|
// Return number of mem tables that are ready to flush (made immutable)
|
|
*value = std::to_string(cfd->imm()->IsFlushPending() ? 1 : 0);
|
|
return true;
|
|
case kCompactionPending:
|
|
// 1 if the system already determines at least one compacdtion is needed.
|
|
// 0 otherwise,
|
|
*value = std::to_string(current->NeedsCompaction() ? 1 : 0);
|
|
return true;
|
|
case kBackgroundErrors:
|
|
// Accumulated number of errors in background flushes or compactions.
|
|
*value = std::to_string(GetBackgroundErrorCount());
|
|
return true;
|
|
case kCurSizeActiveMemTable:
|
|
// Current size of the active memtable
|
|
*value = std::to_string(cfd->mem()->ApproximateMemoryUsage());
|
|
return true;
|
|
case kNumEntriesInMutableMemtable:
|
|
// Current size of the active memtable
|
|
*value = std::to_string(cfd->mem()->GetNumEntries());
|
|
return true;
|
|
case kNumEntriesInImmutableMemtable:
|
|
// Current size of the active memtable
|
|
*value = std::to_string(cfd->imm()->current()->GetTotalNumEntries());
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
} // namespace rocksdb
|