Line data Source code
1 : // Copyright 2019 The LevelDB-Go and Pebble Authors. All rights reserved. Use
2 : // of this source code is governed by a BSD-style license that can be found in
3 : // the LICENSE file.
4 :
5 : package pebble
6 :
7 : import (
8 : "fmt"
9 : "math"
10 : "time"
11 :
12 : "github.com/cockroachdb/pebble/internal/base"
13 : "github.com/cockroachdb/pebble/internal/cache"
14 : "github.com/cockroachdb/pebble/internal/humanize"
15 : "github.com/cockroachdb/pebble/internal/manual"
16 : "github.com/cockroachdb/pebble/objstorage/objstorageprovider/sharedcache"
17 : "github.com/cockroachdb/pebble/record"
18 : "github.com/cockroachdb/pebble/sstable"
19 : "github.com/cockroachdb/pebble/wal"
20 : "github.com/cockroachdb/redact"
21 : "github.com/prometheus/client_golang/prometheus"
22 : )
23 :
24 : // CacheMetrics holds metrics for the block and table cache.
25 : type CacheMetrics = cache.Metrics
26 :
27 : // FilterMetrics holds metrics for the filter policy
28 : type FilterMetrics = sstable.FilterMetrics
29 :
30 : // ThroughputMetric is a cumulative throughput metric. See the detailed
31 : // comment in base.
32 : type ThroughputMetric = base.ThroughputMetric
33 :
34 : // SecondaryCacheMetrics holds metrics for the persistent secondary cache
35 : // that caches commonly accessed blocks from blob storage on a local
36 : // file system.
37 : type SecondaryCacheMetrics = sharedcache.Metrics
38 :
39 : // LevelMetrics holds per-level metrics such as the number of files and total
40 : // size of the files, and compaction related metrics.
41 : type LevelMetrics struct {
42 : // The number of sublevels within the level. The sublevel count corresponds
43 : // to the read amplification for the level. An empty level will have a
44 : // sublevel count of 0, implying no read amplification. Only L0 will have
45 : // a sublevel count other than 0 or 1.
46 : Sublevels int32
47 : // The total number of files in the level.
48 : NumFiles int64
49 : // The total number of virtual sstables in the level.
50 : NumVirtualFiles uint64
51 : // The total size in bytes of the files in the level.
52 : Size int64
53 : // The total size of the virtual sstables in the level.
54 : VirtualSize uint64
55 : // The level's compaction score. This is the compensatedScoreRatio in the
56 : // candidateLevelInfo.
57 : Score float64
58 : // The number of incoming bytes from other levels read during
59 : // compactions. This excludes bytes moved and bytes ingested. For L0 this is
60 : // the bytes written to the WAL.
61 : BytesIn uint64
62 : // The number of bytes ingested. The sibling metric for tables is
63 : // TablesIngested.
64 : BytesIngested uint64
65 : // The number of bytes moved into the level by a "move" compaction. The
66 : // sibling metric for tables is TablesMoved.
67 : BytesMoved uint64
68 : // The number of bytes read for compactions at the level. This includes bytes
69 : // read from other levels (BytesIn), as well as bytes read for the level.
70 : BytesRead uint64
71 : // The number of bytes written during compactions. The sibling
72 : // metric for tables is TablesCompacted. This metric may be summed
73 : // with BytesFlushed to compute the total bytes written for the level.
74 : BytesCompacted uint64
75 : // The number of bytes written during flushes. The sibling
76 : // metrics for tables is TablesFlushed. This metric is always
77 : // zero for all levels other than L0.
78 : BytesFlushed uint64
79 : // The number of sstables compacted to this level.
80 : TablesCompacted uint64
81 : // The number of sstables flushed to this level.
82 : TablesFlushed uint64
83 : // The number of sstables ingested into the level.
84 : TablesIngested uint64
85 : // The number of sstables moved to this level by a "move" compaction.
86 : TablesMoved uint64
87 :
88 : MultiLevel struct {
89 : // BytesInTop are the total bytes in a multilevel compaction coming from the top level.
90 : BytesInTop uint64
91 :
92 : // BytesIn, exclusively for multiLevel compactions.
93 : BytesIn uint64
94 :
95 : // BytesRead, exclusively for multilevel compactions.
96 : BytesRead uint64
97 : }
98 :
99 : // Additional contains misc additional metrics that are not always printed.
100 : Additional struct {
101 : // The sum of Properties.ValueBlocksSize for all the sstables in this
102 : // level. Printed by LevelMetrics.format iff there is at least one level
103 : // with a non-zero value.
104 : ValueBlocksSize uint64
105 : // Cumulative metrics about bytes written to data blocks and value blocks,
106 : // via compactions (except move compactions) or flushes. Not printed by
107 : // LevelMetrics.format, but are available to sophisticated clients.
108 : BytesWrittenDataBlocks uint64
109 : BytesWrittenValueBlocks uint64
110 : }
111 : }
112 :
113 : // Add updates the counter metrics for the level.
114 1 : func (m *LevelMetrics) Add(u *LevelMetrics) {
115 1 : m.NumFiles += u.NumFiles
116 1 : m.NumVirtualFiles += u.NumVirtualFiles
117 1 : m.VirtualSize += u.VirtualSize
118 1 : m.Size += u.Size
119 1 : m.BytesIn += u.BytesIn
120 1 : m.BytesIngested += u.BytesIngested
121 1 : m.BytesMoved += u.BytesMoved
122 1 : m.BytesRead += u.BytesRead
123 1 : m.BytesCompacted += u.BytesCompacted
124 1 : m.BytesFlushed += u.BytesFlushed
125 1 : m.TablesCompacted += u.TablesCompacted
126 1 : m.TablesFlushed += u.TablesFlushed
127 1 : m.TablesIngested += u.TablesIngested
128 1 : m.TablesMoved += u.TablesMoved
129 1 : m.MultiLevel.BytesInTop += u.MultiLevel.BytesInTop
130 1 : m.MultiLevel.BytesRead += u.MultiLevel.BytesRead
131 1 : m.MultiLevel.BytesIn += u.MultiLevel.BytesIn
132 1 : m.Additional.BytesWrittenDataBlocks += u.Additional.BytesWrittenDataBlocks
133 1 : m.Additional.BytesWrittenValueBlocks += u.Additional.BytesWrittenValueBlocks
134 1 : m.Additional.ValueBlocksSize += u.Additional.ValueBlocksSize
135 1 : }
136 :
137 : // WriteAmp computes the write amplification for compactions at this
138 : // level. Computed as (BytesFlushed + BytesCompacted) / BytesIn.
139 1 : func (m *LevelMetrics) WriteAmp() float64 {
140 1 : if m.BytesIn == 0 {
141 1 : return 0
142 1 : }
143 1 : return float64(m.BytesFlushed+m.BytesCompacted) / float64(m.BytesIn)
144 : }
145 :
146 : // Metrics holds metrics for various subsystems of the DB such as the Cache,
147 : // Compactions, WAL, and per-Level metrics.
148 : //
149 : // TODO(peter): The testing of these metrics is relatively weak. There should
150 : // be testing that performs various operations on a DB and verifies that the
151 : // metrics reflect those operations.
152 : type Metrics struct {
153 : BlockCache CacheMetrics
154 :
155 : Compact struct {
156 : // The total number of compactions, and per-compaction type counts.
157 : Count int64
158 : DefaultCount int64
159 : DeleteOnlyCount int64
160 : ElisionOnlyCount int64
161 : CopyCount int64
162 : MoveCount int64
163 : ReadCount int64
164 : TombstoneDensityCount int64
165 : RewriteCount int64
166 : MultiLevelCount int64
167 : CounterLevelCount int64
168 : // An estimate of the number of bytes that need to be compacted for the LSM
169 : // to reach a stable state.
170 : EstimatedDebt uint64
171 : // Number of bytes present in sstables being written by in-progress
172 : // compactions. This value will be zero if there are no in-progress
173 : // compactions.
174 : InProgressBytes int64
175 : // Number of compactions that are in-progress.
176 : NumInProgress int64
177 : // MarkedFiles is a count of files that are marked for
178 : // compaction. Such files are compacted in a rewrite compaction
179 : // when no other compactions are picked.
180 : MarkedFiles int
181 : // Duration records the cumulative duration of all compactions since the
182 : // database was opened.
183 : Duration time.Duration
184 : }
185 :
186 : Ingest struct {
187 : // The total number of ingestions
188 : Count uint64
189 : }
190 :
191 : Flush struct {
192 : // The total number of flushes.
193 : Count int64
194 : WriteThroughput ThroughputMetric
195 : // Number of flushes that are in-progress. In the current implementation
196 : // this will always be zero or one.
197 : NumInProgress int64
198 : // AsIngestCount is a monotonically increasing counter of flush operations
199 : // handling ingested tables.
200 : AsIngestCount uint64
201 : // AsIngestCount is a monotonically increasing counter of tables ingested as
202 : // flushables.
203 : AsIngestTableCount uint64
204 : // AsIngestBytes is a monotonically increasing counter of the bytes flushed
205 : // for flushables that originated as ingestion operations.
206 : AsIngestBytes uint64
207 : }
208 :
209 : Filter FilterMetrics
210 :
211 : Levels [numLevels]LevelMetrics
212 :
213 : MemTable struct {
214 : // The number of bytes allocated by memtables and large (flushable)
215 : // batches.
216 : Size uint64
217 : // The count of memtables.
218 : Count int64
219 : // The number of bytes present in zombie memtables which are no longer
220 : // referenced by the current DB state. An unbounded number of memtables
221 : // may be zombie if they're still in use by an iterator. One additional
222 : // memtable may be zombie if it's no longer in use and waiting to be
223 : // recycled.
224 : ZombieSize uint64
225 : // The count of zombie memtables.
226 : ZombieCount int64
227 : }
228 :
229 : Keys struct {
230 : // The approximate count of internal range key set keys in the database.
231 : RangeKeySetsCount uint64
232 : // The approximate count of internal tombstones (DEL, SINGLEDEL and
233 : // RANGEDEL key kinds) within the database.
234 : TombstoneCount uint64
235 : // A cumulative total number of missized DELSIZED keys encountered by
236 : // compactions since the database was opened.
237 : MissizedTombstonesCount uint64
238 : }
239 :
240 : Snapshots struct {
241 : // The number of currently open snapshots.
242 : Count int
243 : // The sequence number of the earliest, currently open snapshot.
244 : EarliestSeqNum base.SeqNum
245 : // A running tally of keys written to sstables during flushes or
246 : // compactions that would've been elided if it weren't for open
247 : // snapshots.
248 : PinnedKeys uint64
249 : // A running cumulative sum of the size of keys and values written to
250 : // sstables during flushes or compactions that would've been elided if
251 : // it weren't for open snapshots.
252 : PinnedSize uint64
253 : }
254 :
255 : Table struct {
256 : // The number of bytes present in obsolete tables which are no longer
257 : // referenced by the current DB state or any open iterators.
258 : ObsoleteSize uint64
259 : // The count of obsolete tables.
260 : ObsoleteCount int64
261 : // The number of bytes present in zombie tables which are no longer
262 : // referenced by the current DB state but are still in use by an iterator.
263 : ZombieSize uint64
264 : // The count of zombie tables.
265 : ZombieCount int64
266 : // The count of sstables backing virtual tables.
267 : BackingTableCount uint64
268 : // The sum of the sizes of the BackingTableCount sstables that are backing virtual tables.
269 : BackingTableSize uint64
270 : // The number of sstables that are compressed with an unknown compression
271 : // algorithm.
272 : CompressedCountUnknown int64
273 : // The number of sstables that are compressed with the default compression
274 : // algorithm, snappy.
275 : CompressedCountSnappy int64
276 : // The number of sstables that are compressed with zstd.
277 : CompressedCountZstd int64
278 : // The number of sstables that are uncompressed.
279 : CompressedCountNone int64
280 :
281 : // Local file sizes.
282 : Local struct {
283 : // LiveSize is the number of bytes in live tables.
284 : LiveSize uint64
285 : // ObsoleteSize is the number of bytes in obsolete tables.
286 : ObsoleteSize uint64
287 : // ZombieSize is the number of bytes in zombie tables.
288 : ZombieSize uint64
289 : }
290 : }
291 :
292 : TableCache CacheMetrics
293 :
294 : // Count of the number of open sstable iterators.
295 : TableIters int64
296 : // Uptime is the total time since this DB was opened.
297 : Uptime time.Duration
298 :
299 : WAL struct {
300 : // Number of live WAL files.
301 : Files int64
302 : // Number of obsolete WAL files.
303 : ObsoleteFiles int64
304 : // Physical size of the obsolete WAL files.
305 : ObsoletePhysicalSize uint64
306 : // Size of the live data in the WAL files. Note that with WAL file
307 : // recycling this is less than the actual on-disk size of the WAL files.
308 : Size uint64
309 : // Physical size of the WAL files on-disk. With WAL file recycling,
310 : // this is greater than the live data in WAL files.
311 : //
312 : // TODO(sumeer): it seems this does not include ObsoletePhysicalSize.
313 : // Should the comment be updated?
314 : PhysicalSize uint64
315 : // Number of logical bytes written to the WAL.
316 : BytesIn uint64
317 : // Number of bytes written to the WAL.
318 : BytesWritten uint64
319 : // Failover contains failover stats. Empty if failover is not enabled.
320 : Failover wal.FailoverStats
321 : }
322 :
323 : LogWriter struct {
324 : FsyncLatency prometheus.Histogram
325 : record.LogWriterMetrics
326 : }
327 :
328 : CategoryStats []sstable.CategoryStatsAggregate
329 :
330 : SecondaryCacheMetrics SecondaryCacheMetrics
331 :
332 : private struct {
333 : optionsFileSize uint64
334 : manifestFileSize uint64
335 : }
336 :
337 : manualMemory manual.Metrics
338 : }
339 :
340 : var (
341 : // FsyncLatencyBuckets are prometheus histogram buckets suitable for a histogram
342 : // that records latencies for fsyncs.
343 : FsyncLatencyBuckets = append(
344 : prometheus.LinearBuckets(0.0, float64(time.Microsecond*100), 50),
345 : prometheus.ExponentialBucketsRange(float64(time.Millisecond*5), float64(10*time.Second), 50)...,
346 : )
347 :
348 : // SecondaryCacheIOBuckets exported to enable exporting from package pebble to
349 : // enable exporting metrics with below buckets in CRDB.
350 : SecondaryCacheIOBuckets = sharedcache.IOBuckets
351 : // SecondaryCacheChannelWriteBuckets exported to enable exporting from package
352 : // pebble to enable exporting metrics with below buckets in CRDB.
353 : SecondaryCacheChannelWriteBuckets = sharedcache.ChannelWriteBuckets
354 : )
355 :
356 : // DiskSpaceUsage returns the total disk space used by the database in bytes,
357 : // including live and obsolete files. This only includes local files, i.e.,
358 : // remote files (as known to objstorage.Provider) are not included.
359 1 : func (m *Metrics) DiskSpaceUsage() uint64 {
360 1 : var usageBytes uint64
361 1 : usageBytes += m.WAL.PhysicalSize
362 1 : usageBytes += m.WAL.ObsoletePhysicalSize
363 1 : usageBytes += m.Table.Local.LiveSize
364 1 : usageBytes += m.Table.Local.ObsoleteSize
365 1 : usageBytes += m.Table.Local.ZombieSize
366 1 : usageBytes += m.private.optionsFileSize
367 1 : usageBytes += m.private.manifestFileSize
368 1 : // TODO(sumeer): InProgressBytes does not distinguish between local and
369 1 : // remote files. This causes a small error. Fix.
370 1 : usageBytes += uint64(m.Compact.InProgressBytes)
371 1 : return usageBytes
372 1 : }
373 :
374 : // NumVirtual is the number of virtual sstables in the latest version
375 : // summed over every level in the lsm.
376 1 : func (m *Metrics) NumVirtual() uint64 {
377 1 : var n uint64
378 1 : for _, level := range m.Levels {
379 1 : n += level.NumVirtualFiles
380 1 : }
381 1 : return n
382 : }
383 :
384 : // VirtualSize is the sum of the sizes of the virtual sstables in the
385 : // latest version. BackingTableSize - VirtualSize gives an estimate for
386 : // the space amplification caused by not compacting virtual sstables.
387 1 : func (m *Metrics) VirtualSize() uint64 {
388 1 : var size uint64
389 1 : for _, level := range m.Levels {
390 1 : size += level.VirtualSize
391 1 : }
392 1 : return size
393 : }
394 :
395 : // ReadAmp returns the current read amplification of the database.
396 : // It's computed as the number of sublevels in L0 + the number of non-empty
397 : // levels below L0.
398 1 : func (m *Metrics) ReadAmp() int {
399 1 : var ramp int32
400 1 : for _, l := range m.Levels {
401 1 : ramp += l.Sublevels
402 1 : }
403 1 : return int(ramp)
404 : }
405 :
406 : // Total returns the sum of the per-level metrics and WAL metrics.
407 1 : func (m *Metrics) Total() LevelMetrics {
408 1 : var total LevelMetrics
409 1 : for level := 0; level < numLevels; level++ {
410 1 : l := &m.Levels[level]
411 1 : total.Add(l)
412 1 : total.Sublevels += l.Sublevels
413 1 : }
414 : // Compute total bytes-in as the bytes written to the WAL + bytes ingested.
415 1 : total.BytesIn = m.WAL.BytesWritten + total.BytesIngested
416 1 : // Add the total bytes-in to the total bytes-flushed. This is to account for
417 1 : // the bytes written to the log and bytes written externally and then
418 1 : // ingested.
419 1 : total.BytesFlushed += total.BytesIn
420 1 : return total
421 : }
422 :
423 : // String pretty-prints the metrics as below:
424 : //
425 : // | | | | ingested | moved | written | | amp
426 : // level | tables size val-bl vtables | score | in | tables size | tables size | tables size | read | r w
427 : // ------+-----------------------------+-------+-------+--------------+--------------+--------------+-------+---------
428 : // 0 | 101 102B 0B 0 | 103.0 | 104B | 112 104B | 113 106B | 221 217B | 107B | 1 2.1
429 : // 1 | 201 202B 0B 0 | 203.0 | 204B | 212 204B | 213 206B | 421 417B | 207B | 2 2.0
430 : // 2 | 301 302B 0B 0 | 303.0 | 304B | 312 304B | 313 306B | 621 617B | 307B | 3 2.0
431 : // 3 | 401 402B 0B 0 | 403.0 | 404B | 412 404B | 413 406B | 821 817B | 407B | 4 2.0
432 : // 4 | 501 502B 0B 0 | 503.0 | 504B | 512 504B | 513 506B | 1.0K 1017B | 507B | 5 2.0
433 : // 5 | 601 602B 0B 0 | 603.0 | 604B | 612 604B | 613 606B | 1.2K 1.2KB | 607B | 6 2.0
434 : // 6 | 701 702B 0B 0 | - | 704B | 712 704B | 713 706B | 1.4K 1.4KB | 707B | 7 2.0
435 : // total | 2.8K 2.7KB 0B 0 | - | 2.8KB | 2.9K 2.8KB | 2.9K 2.8KB | 5.7K 8.4KB | 2.8KB | 28 3.0
436 : // -------------------------------------------------------------------------------------------------------------------
437 : // WAL: 22 files (24B) in: 25B written: 26B (4% overhead)
438 : // Flushes: 8
439 : // Compactions: 5 estimated debt: 6B in progress: 2 (7B)
440 : // default: 27 delete: 28 elision: 29 move: 30 read: 31 rewrite: 32 multi-level: 33
441 : // MemTables: 12 (11B) zombie: 14 (13B)
442 : // Zombie tables: 16 (15B)
443 : // Backing tables: 0 (0B)
444 : // Block cache: 2 entries (1B) hit rate: 42.9%
445 : // Table cache: 18 entries (17B) hit rate: 48.7%
446 : // Secondary cache: 40 entries (40B) hit rate: 49.9%
447 : // Snapshots: 4 earliest seq num: 1024
448 : // Table iters: 21
449 : // Filter utility: 47.4%
450 : // Ingestions: 27 as flushable: 36 (34B in 35 tables)
451 1 : func (m *Metrics) String() string {
452 1 : return redact.StringWithoutMarkers(m)
453 1 : }
454 :
455 : var _ redact.SafeFormatter = &Metrics{}
456 :
457 : // SafeFormat implements redact.SafeFormatter.
458 1 : func (m *Metrics) SafeFormat(w redact.SafePrinter, _ rune) {
459 1 : // NB: Pebble does not make any assumptions as to which Go primitive types
460 1 : // have been registered as safe with redact.RegisterSafeType and does not
461 1 : // register any types itself. Some of the calls to `redact.Safe`, etc are
462 1 : // superfluous in the context of CockroachDB, which registers all the Go
463 1 : // numeric types as safe.
464 1 :
465 1 : // TODO(jackson): There are a few places where we use redact.SafeValue
466 1 : // instead of redact.RedactableString. This is necessary because of a bug
467 1 : // whereby formatting a redact.RedactableString argument does not respect
468 1 : // width specifiers. When the issue is fixed, we can convert these to
469 1 : // RedactableStrings. https://github.com/cockroachdb/redact/issues/17
470 1 :
471 1 : multiExists := m.Compact.MultiLevelCount > 0
472 1 : appendIfMulti := func(line redact.SafeString) {
473 1 : if multiExists {
474 1 : w.SafeString(line)
475 1 : }
476 : }
477 1 : newline := func() {
478 1 : w.SafeString("\n")
479 1 : }
480 :
481 1 : w.SafeString(" | | | | ingested | moved | written | | amp")
482 1 : appendIfMulti(" | multilevel")
483 1 : newline()
484 1 : w.SafeString("level | tables size val-bl vtables | score | in | tables size | tables size | tables size | read | r w")
485 1 : appendIfMulti(" | top in read")
486 1 : newline()
487 1 : w.SafeString("------+-----------------------------+-------+-------+--------------+--------------+--------------+-------+---------")
488 1 : appendIfMulti("-+------------------")
489 1 : newline()
490 1 :
491 1 : // formatRow prints out a row of the table.
492 1 : formatRow := func(m *LevelMetrics, score float64) {
493 1 : scoreStr := "-"
494 1 : if !math.IsNaN(score) {
495 1 : // Try to keep the string no longer than 5 characters.
496 1 : switch {
497 1 : case score < 99.995:
498 1 : scoreStr = fmt.Sprintf("%.2f", score)
499 1 : case score < 999.95:
500 1 : scoreStr = fmt.Sprintf("%.1f", score)
501 0 : default:
502 0 : scoreStr = fmt.Sprintf("%.0f", score)
503 : }
504 : }
505 1 : var wampStr string
506 1 : if wamp := m.WriteAmp(); wamp > 99.5 {
507 0 : wampStr = fmt.Sprintf("%.0f", wamp)
508 1 : } else {
509 1 : wampStr = fmt.Sprintf("%.1f", wamp)
510 1 : }
511 :
512 1 : w.Printf("| %5s %6s %6s %7s | %5s | %5s | %5s %6s | %5s %6s | %5s %6s | %5s | %3d %4s",
513 1 : humanize.Count.Int64(m.NumFiles),
514 1 : humanize.Bytes.Int64(m.Size),
515 1 : humanize.Bytes.Uint64(m.Additional.ValueBlocksSize),
516 1 : humanize.Count.Uint64(m.NumVirtualFiles),
517 1 : redact.Safe(scoreStr),
518 1 : humanize.Bytes.Uint64(m.BytesIn),
519 1 : humanize.Count.Uint64(m.TablesIngested),
520 1 : humanize.Bytes.Uint64(m.BytesIngested),
521 1 : humanize.Count.Uint64(m.TablesMoved),
522 1 : humanize.Bytes.Uint64(m.BytesMoved),
523 1 : humanize.Count.Uint64(m.TablesFlushed+m.TablesCompacted),
524 1 : humanize.Bytes.Uint64(m.BytesFlushed+m.BytesCompacted),
525 1 : humanize.Bytes.Uint64(m.BytesRead),
526 1 : redact.Safe(m.Sublevels),
527 1 : redact.Safe(wampStr))
528 1 :
529 1 : if multiExists {
530 1 : w.Printf(" | %5s %5s %5s",
531 1 : humanize.Bytes.Uint64(m.MultiLevel.BytesInTop),
532 1 : humanize.Bytes.Uint64(m.MultiLevel.BytesIn),
533 1 : humanize.Bytes.Uint64(m.MultiLevel.BytesRead))
534 1 : }
535 1 : newline()
536 : }
537 :
538 1 : var total LevelMetrics
539 1 : for level := 0; level < numLevels; level++ {
540 1 : l := &m.Levels[level]
541 1 : w.Printf("%5d ", redact.Safe(level))
542 1 :
543 1 : // Format the score.
544 1 : score := math.NaN()
545 1 : if level < numLevels-1 {
546 1 : score = l.Score
547 1 : }
548 1 : formatRow(l, score)
549 1 : total.Add(l)
550 1 : total.Sublevels += l.Sublevels
551 : }
552 : // Compute total bytes-in as the bytes written to the WAL + bytes ingested.
553 1 : total.BytesIn = m.WAL.BytesWritten + total.BytesIngested
554 1 : // Add the total bytes-in to the total bytes-flushed. This is to account for
555 1 : // the bytes written to the log and bytes written externally and then
556 1 : // ingested.
557 1 : total.BytesFlushed += total.BytesIn
558 1 : w.SafeString("total ")
559 1 : formatRow(&total, math.NaN())
560 1 :
561 1 : w.SafeString("-------------------------------------------------------------------------------------------------------------------")
562 1 : appendIfMulti("--------------------")
563 1 : newline()
564 1 : w.Printf("WAL: %d files (%s) in: %s written: %s (%.0f%% overhead)",
565 1 : redact.Safe(m.WAL.Files),
566 1 : humanize.Bytes.Uint64(m.WAL.Size),
567 1 : humanize.Bytes.Uint64(m.WAL.BytesIn),
568 1 : humanize.Bytes.Uint64(m.WAL.BytesWritten),
569 1 : redact.Safe(percent(int64(m.WAL.BytesWritten)-int64(m.WAL.BytesIn), int64(m.WAL.BytesIn))))
570 1 : failoverStats := m.WAL.Failover
571 1 : failoverStats.FailoverWriteAndSyncLatency = nil
572 1 : if failoverStats == (wal.FailoverStats{}) {
573 1 : w.Printf("\n")
574 1 : } else {
575 0 : w.Printf(" failover: (switches: %d, primary: %s, secondary: %s)\n", m.WAL.Failover.DirSwitchCount,
576 0 : m.WAL.Failover.PrimaryWriteDuration.String(), m.WAL.Failover.SecondaryWriteDuration.String())
577 0 : }
578 :
579 1 : w.Printf("Flushes: %d\n", redact.Safe(m.Flush.Count))
580 1 :
581 1 : w.Printf("Compactions: %d estimated debt: %s in progress: %d (%s)\n",
582 1 : redact.Safe(m.Compact.Count),
583 1 : humanize.Bytes.Uint64(m.Compact.EstimatedDebt),
584 1 : redact.Safe(m.Compact.NumInProgress),
585 1 : humanize.Bytes.Int64(m.Compact.InProgressBytes))
586 1 :
587 1 : w.Printf(" default: %d delete: %d elision: %d move: %d read: %d tombstone-density: %d rewrite: %d copy: %d multi-level: %d\n",
588 1 : redact.Safe(m.Compact.DefaultCount),
589 1 : redact.Safe(m.Compact.DeleteOnlyCount),
590 1 : redact.Safe(m.Compact.ElisionOnlyCount),
591 1 : redact.Safe(m.Compact.MoveCount),
592 1 : redact.Safe(m.Compact.ReadCount),
593 1 : redact.Safe(m.Compact.TombstoneDensityCount),
594 1 : redact.Safe(m.Compact.RewriteCount),
595 1 : redact.Safe(m.Compact.CopyCount),
596 1 : redact.Safe(m.Compact.MultiLevelCount))
597 1 :
598 1 : w.Printf("MemTables: %d (%s) zombie: %d (%s)\n",
599 1 : redact.Safe(m.MemTable.Count),
600 1 : humanize.Bytes.Uint64(m.MemTable.Size),
601 1 : redact.Safe(m.MemTable.ZombieCount),
602 1 : humanize.Bytes.Uint64(m.MemTable.ZombieSize))
603 1 :
604 1 : w.Printf("Zombie tables: %d (%s, local: %s)\n",
605 1 : redact.Safe(m.Table.ZombieCount),
606 1 : humanize.Bytes.Uint64(m.Table.ZombieSize),
607 1 : humanize.Bytes.Uint64(m.Table.Local.ZombieSize))
608 1 :
609 1 : w.Printf("Backing tables: %d (%s)\n",
610 1 : redact.Safe(m.Table.BackingTableCount),
611 1 : humanize.Bytes.Uint64(m.Table.BackingTableSize))
612 1 : w.Printf("Virtual tables: %d (%s)\n",
613 1 : redact.Safe(m.NumVirtual()),
614 1 : humanize.Bytes.Uint64(m.VirtualSize()))
615 1 : w.Printf("Local tables size: %s\n", humanize.Bytes.Uint64(m.Table.Local.LiveSize))
616 1 : w.SafeString("Compression types:")
617 1 : if count := m.Table.CompressedCountSnappy; count > 0 {
618 1 : w.Printf(" snappy: %d", redact.Safe(count))
619 1 : }
620 1 : if count := m.Table.CompressedCountZstd; count > 0 {
621 0 : w.Printf(" zstd: %d", redact.Safe(count))
622 0 : }
623 1 : if count := m.Table.CompressedCountNone; count > 0 {
624 0 : w.Printf(" none: %d", redact.Safe(count))
625 0 : }
626 1 : if count := m.Table.CompressedCountUnknown; count > 0 {
627 1 : w.Printf(" unknown: %d", redact.Safe(count))
628 1 : }
629 1 : w.Print("\n")
630 1 :
631 1 : formatCacheMetrics := func(m *CacheMetrics, name redact.SafeString) {
632 1 : w.Printf("%s: %s entries (%s) hit rate: %.1f%%\n",
633 1 : name,
634 1 : humanize.Count.Int64(m.Count),
635 1 : humanize.Bytes.Int64(m.Size),
636 1 : redact.Safe(hitRate(m.Hits, m.Misses)))
637 1 : }
638 1 : formatCacheMetrics(&m.BlockCache, "Block cache")
639 1 : formatCacheMetrics(&m.TableCache, "Table cache")
640 1 :
641 1 : formatSharedCacheMetrics := func(w redact.SafePrinter, m *SecondaryCacheMetrics, name redact.SafeString) {
642 1 : w.Printf("%s: %s entries (%s) hit rate: %.1f%%\n",
643 1 : name,
644 1 : humanize.Count.Int64(m.Count),
645 1 : humanize.Bytes.Int64(m.Size),
646 1 : redact.Safe(hitRate(m.ReadsWithFullHit, m.ReadsWithPartialHit+m.ReadsWithNoHit)))
647 1 : }
648 1 : formatSharedCacheMetrics(w, &m.SecondaryCacheMetrics, "Secondary cache")
649 1 :
650 1 : w.Printf("Snapshots: %d earliest seq num: %d\n",
651 1 : redact.Safe(m.Snapshots.Count),
652 1 : redact.Safe(m.Snapshots.EarliestSeqNum))
653 1 :
654 1 : w.Printf("Table iters: %d\n", redact.Safe(m.TableIters))
655 1 : w.Printf("Filter utility: %.1f%%\n", redact.Safe(hitRate(m.Filter.Hits, m.Filter.Misses)))
656 1 : w.Printf("Ingestions: %d as flushable: %d (%s in %d tables)\n",
657 1 : redact.Safe(m.Ingest.Count),
658 1 : redact.Safe(m.Flush.AsIngestCount),
659 1 : humanize.Bytes.Uint64(m.Flush.AsIngestBytes),
660 1 : redact.Safe(m.Flush.AsIngestTableCount))
661 1 :
662 1 : var inUseTotal uint64
663 1 : for i := range m.manualMemory {
664 1 : inUseTotal += m.manualMemory[i].InUseBytes
665 1 : }
666 1 : inUse := func(purpose manual.Purpose) uint64 {
667 1 : return m.manualMemory[purpose].InUseBytes
668 1 : }
669 1 : w.Printf("Cgo memory usage: %s block cache: %s (data: %s, maps: %s, entries: %s) memtables: %s\n",
670 1 : humanize.Bytes.Uint64(inUseTotal),
671 1 : humanize.Bytes.Uint64(inUse(manual.BlockCacheData)+inUse(manual.BlockCacheMap)+inUse(manual.BlockCacheEntry)),
672 1 : humanize.Bytes.Uint64(inUse(manual.BlockCacheData)),
673 1 : humanize.Bytes.Uint64(inUse(manual.BlockCacheMap)),
674 1 : humanize.Bytes.Uint64(inUse(manual.BlockCacheEntry)),
675 1 : humanize.Bytes.Uint64(inUse(manual.MemTable)),
676 1 : )
677 : }
678 :
679 1 : func hitRate(hits, misses int64) float64 {
680 1 : return percent(hits, hits+misses)
681 1 : }
682 :
683 1 : func percent(numerator, denominator int64) float64 {
684 1 : if denominator == 0 {
685 1 : return 0
686 1 : }
687 1 : return 100 * float64(numerator) / float64(denominator)
688 : }
689 :
690 : // StringForTests is identical to m.String() on 64-bit platforms. It is used to
691 : // provide a platform-independent result for tests.
692 1 : func (m *Metrics) StringForTests() string {
693 1 : mCopy := *m
694 1 : if math.MaxInt == math.MaxInt32 {
695 0 : // This is the difference in Sizeof(sstable.Reader{})) between 64 and 32 bit
696 0 : // platforms.
697 0 : const tableCacheSizeAdjustment = 212
698 0 : mCopy.TableCache.Size += mCopy.TableCache.Count * tableCacheSizeAdjustment
699 0 : }
700 : // Don't show cgo memory statistics as they can vary based on architecture,
701 : // invariants tag, etc.
702 1 : mCopy.manualMemory = manual.Metrics{}
703 1 : return redact.StringWithoutMarkers(&mCopy)
704 : }
|
