mito2/
metrics.rs

1// Copyright 2023 Greptime Team
2//
3// Licensed under the Apache License, Version 2.0 (the "License");
4// you may not use this file except in compliance with the License.
5// You may obtain a copy of the License at
6//
7//     http://www.apache.org/licenses/LICENSE-2.0
8//
9// Unless required by applicable law or agreed to in writing, software
10// distributed under the License is distributed on an "AS IS" BASIS,
11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12// See the License for the specific language governing permissions and
13// limitations under the License.
14
15use std::time::Duration;
16
17use lazy_static::lazy_static;
18use prometheus::*;
19use puffin::puffin_manager::stager::StagerNotifier;
20
21/// Stage label.
22pub const STAGE_LABEL: &str = "stage";
23/// Type label.
24pub const TYPE_LABEL: &str = "type";
25const CACHE_EVICTION_CAUSE: &str = "cause";
26/// Reason to flush.
27pub const FLUSH_REASON: &str = "reason";
28/// File type label.
29pub const FILE_TYPE_LABEL: &str = "file_type";
30/// Region worker id label.
31pub const WORKER_LABEL: &str = "worker";
32/// Partition label.
33pub const PARTITION_LABEL: &str = "partition";
34/// Staging dir type label.
35pub const STAGING_TYPE: &str = "index_staging";
36/// Recycle bin type label.
37pub const RECYCLE_TYPE: &str = "recycle_bin";
38
39// Write metrics.
40lazy_static! {
41    /// Global write buffer size in bytes.
42    pub static ref WRITE_BUFFER_BYTES: IntGauge =
43        register_int_gauge!("greptime_mito_write_buffer_bytes", "mito write buffer bytes").unwrap();
44    /// Global memtable dictionary size in bytes.
45    pub static ref MEMTABLE_DICT_BYTES: IntGauge =
46        register_int_gauge!("greptime_mito_memtable_dict_bytes", "mito memtable dictionary size in bytes").unwrap();
47    /// Gauge for open regions in each worker.
48    pub static ref REGION_COUNT: IntGaugeVec =
49        register_int_gauge_vec!(
50            "greptime_mito_region_count",
51            "mito region count in each worker",
52            &[WORKER_LABEL],
53        ).unwrap();
54    /// Elapsed time to handle requests.
55    pub static ref HANDLE_REQUEST_ELAPSED: HistogramVec = register_histogram_vec!(
56            "greptime_mito_handle_request_elapsed",
57            "mito handle request elapsed",
58            &[TYPE_LABEL],
59            // 0.01 ~ 10000
60            exponential_buckets(0.01, 10.0, 7).unwrap(),
61        )
62        .unwrap();
63
64    // ------ Flush related metrics
65    /// Counter of scheduled flush requests.
66    /// Note that the flush scheduler may merge some flush requests.
67    pub static ref FLUSH_REQUESTS_TOTAL: IntCounterVec = register_int_counter_vec!(
68            "greptime_mito_flush_requests_total",
69            "mito flush requests total",
70            &[FLUSH_REASON]
71        )
72        .unwrap();
73    /// Counter of scheduled failed flush jobs.
74    pub static ref FLUSH_FAILURE_TOTAL: IntCounter =
75        register_int_counter!("greptime_mito_flush_failure_total", "mito flush failure total").unwrap();
76    /// Elapsed time of a flush job.
77    pub static ref FLUSH_ELAPSED: HistogramVec = register_histogram_vec!(
78            "greptime_mito_flush_elapsed",
79            "mito flush elapsed",
80            &[TYPE_LABEL],
81            // 1 ~ 625
82            exponential_buckets(1.0, 5.0, 6).unwrap(),
83        )
84        .unwrap();
85    /// Histogram of flushed bytes.
86    pub static ref FLUSH_BYTES_TOTAL: IntCounter =
87        register_int_counter!("greptime_mito_flush_bytes_total", "mito flush bytes total").unwrap();
88    /// Gauge for inflight flush tasks.
89    pub static ref INFLIGHT_FLUSH_COUNT: IntGauge =
90        register_int_gauge!(
91            "greptime_mito_inflight_flush_count",
92            "inflight flush count",
93        ).unwrap();
94    // ------ End of flush related metrics
95
96
97    // ------ Write related metrics
98    //
99    /// Counter of rejected write requests.
100    pub static ref WRITE_REJECT_TOTAL: IntCounter =
101        register_int_counter!("greptime_mito_write_reject_total", "mito write reject total").unwrap();
102    /// Elapsed time of each write stage.
103    pub static ref WRITE_STAGE_ELAPSED: HistogramVec = register_histogram_vec!(
104            "greptime_mito_write_stage_elapsed",
105            "mito write stage elapsed",
106            &[STAGE_LABEL],
107            // 0.01 ~ 1000
108            exponential_buckets(0.01, 10.0, 6).unwrap(),
109        )
110        .unwrap();
111    /// Counter of rows to write.
112    pub static ref WRITE_ROWS_TOTAL: IntCounterVec = register_int_counter_vec!(
113        "greptime_mito_write_rows_total",
114        "mito write rows total",
115        &[TYPE_LABEL]
116    )
117    .unwrap();
118}
119
120// Compaction metrics.
121lazy_static! {
122    /// Timer of different stages in compaction.
123    /// - pick
124    /// - merge (in parallel)
125    ///   - iter_source
126    ///   - write_batch
127    ///   - update_index
128    ///   - upload_parquet
129    ///   - upload puffin
130    /// - write_manifest
131    pub static ref COMPACTION_STAGE_ELAPSED: HistogramVec = register_histogram_vec!(
132        "greptime_mito_compaction_stage_elapsed",
133        "mito compaction stage elapsed",
134        &[STAGE_LABEL],
135        // 1 ~ 100000
136        exponential_buckets(1.0, 10.0, 6).unwrap(),
137    )
138    .unwrap();
139    /// Timer of whole compaction task.
140    pub static ref COMPACTION_ELAPSED_TOTAL: Histogram =
141        register_histogram!(
142        "greptime_mito_compaction_total_elapsed",
143        "mito compaction total elapsed",
144        // 1 ~ 100000
145        exponential_buckets(1.0, 10.0, 6).unwrap(),
146    ).unwrap();
147    /// Counter of all requested compaction task.
148    pub static ref COMPACTION_REQUEST_COUNT: IntCounter =
149        register_int_counter!("greptime_mito_compaction_requests_total", "mito compaction requests total").unwrap();
150    /// Counter of failed compaction task.
151    pub static ref COMPACTION_FAILURE_COUNT: IntCounter =
152        register_int_counter!("greptime_mito_compaction_failure_total", "mito compaction failure total").unwrap();
153
154    /// Gauge for inflight compaction tasks.
155    pub static ref INFLIGHT_COMPACTION_COUNT: IntGauge =
156        register_int_gauge!(
157            "greptime_mito_inflight_compaction_count",
158            "inflight compaction count",
159        ).unwrap();
160
161    /// Bytes reserved by compaction memory manager.
162    pub static ref COMPACTION_MEMORY_IN_USE: IntGauge =
163        register_int_gauge!(
164            "greptime_mito_compaction_memory_in_use_bytes",
165            "bytes currently reserved for compaction tasks",
166        )
167        .unwrap();
168    /// Configured compaction memory limit.
169    pub static ref COMPACTION_MEMORY_LIMIT: IntGauge =
170        register_int_gauge!(
171            "greptime_mito_compaction_memory_limit_bytes",
172            "maximum bytes allowed for compaction tasks",
173        )
174        .unwrap();
175    /// Wait time to obtain compaction memory.
176    pub static ref COMPACTION_MEMORY_WAIT: Histogram = register_histogram!(
177        "greptime_mito_compaction_memory_wait_seconds",
178        "time waiting for compaction memory",
179        // 0.01s ~ ~10s
180        exponential_buckets(0.01, 2.0, 10).unwrap(),
181    ).unwrap();
182    /// Counter of rejected compaction memory allocations.
183    pub static ref COMPACTION_MEMORY_REJECTED: IntCounterVec =
184        register_int_counter_vec!(
185            "greptime_mito_compaction_memory_rejected_total",
186            "number of compaction tasks rejected due to memory limit",
187            &[TYPE_LABEL]
188        ).unwrap();
189}
190
191// Query metrics.
192lazy_static! {
193    /// Timer of different stages in query.
194    pub static ref READ_STAGE_ELAPSED: HistogramVec = register_histogram_vec!(
195        "greptime_mito_read_stage_elapsed",
196        "mito read stage elapsed",
197        &[STAGE_LABEL],
198        // 0.01 ~ 10000
199        exponential_buckets(0.01, 10.0, 7).unwrap(),
200    )
201    .unwrap();
202    pub static ref READ_STAGE_FETCH_PAGES: Histogram = READ_STAGE_ELAPSED.with_label_values(&["fetch_pages"]);
203    /// Number of in-progress scan per partition.
204    pub static ref IN_PROGRESS_SCAN: IntGaugeVec = register_int_gauge_vec!(
205        "greptime_mito_in_progress_scan",
206        "mito in progress scan per partition",
207        &[TYPE_LABEL, PARTITION_LABEL]
208    )
209    .unwrap();
210    /// Counter of rows read from different source.
211    pub static ref READ_ROWS_TOTAL: IntCounterVec =
212        register_int_counter_vec!("greptime_mito_read_rows_total", "mito read rows total", &[TYPE_LABEL]).unwrap();
213    /// Counter of filtered rows during merge.
214    pub static ref MERGE_FILTER_ROWS_TOTAL: IntCounterVec =
215        register_int_counter_vec!("greptime_mito_merge_filter_rows_total", "mito merge filter rows total", &[TYPE_LABEL]).unwrap();
216    /// Counter of row groups read.
217    pub static ref READ_ROW_GROUPS_TOTAL: IntCounterVec =
218        register_int_counter_vec!("greptime_mito_read_row_groups_total", "mito read row groups total", &[TYPE_LABEL]).unwrap();
219    /// Counter of filtered rows by precise filter.
220    pub static ref PRECISE_FILTER_ROWS_TOTAL: IntCounterVec =
221        register_int_counter_vec!("greptime_mito_precise_filter_rows_total", "mito precise filter rows total", &[TYPE_LABEL]).unwrap();
222    pub static ref READ_ROWS_IN_ROW_GROUP_TOTAL: IntCounterVec =
223        register_int_counter_vec!("greptime_mito_read_rows_in_row_group_total", "mito read rows in row group total", &[TYPE_LABEL]).unwrap();
224    /// Histogram for the number of SSTs to scan per query.
225    pub static ref READ_SST_COUNT: Histogram = register_histogram!(
226        "greptime_mito_read_sst_count",
227        "Number of SSTs to scan in a scan task",
228        vec![1.0, 4.0, 8.0, 16.0, 32.0, 64.0, 256.0, 1024.0],
229    ).unwrap();
230    /// Histogram for the number of rows returned per query.
231    pub static ref READ_ROWS_RETURN: Histogram = register_histogram!(
232        "greptime_mito_read_rows_return",
233        "Number of rows returned in a scan task",
234        exponential_buckets(100.0, 10.0, 8).unwrap(),
235    ).unwrap();
236    /// Histogram for the number of batches returned per query.
237    pub static ref READ_BATCHES_RETURN: Histogram = register_histogram!(
238        "greptime_mito_read_batches_return",
239        "Number of rows returned in a scan task",
240        exponential_buckets(100.0, 10.0, 7).unwrap(),
241    ).unwrap();
242    /// Gauge for scan memory usage in bytes.
243    pub static ref SCAN_MEMORY_USAGE_BYTES: IntGauge = register_int_gauge!(
244        "greptime_mito_scan_memory_usage_bytes",
245        "current scan memory usage in bytes"
246    ).unwrap();
247    /// Counter of rejected scan requests due to memory limit.
248    pub static ref SCAN_REQUESTS_REJECTED_TOTAL: IntCounter = register_int_counter!(
249        "greptime_mito_scan_requests_rejected_total",
250        "total number of scan requests rejected due to memory limit"
251    ).unwrap();
252}
253
254// Cache metrics.
255lazy_static! {
256    /// Cache hit counter.
257    pub static ref CACHE_HIT: IntCounterVec = register_int_counter_vec!(
258        "greptime_mito_cache_hit",
259        "mito cache hit",
260        &[TYPE_LABEL]
261    )
262    .unwrap();
263    /// Cache miss counter.
264    pub static ref CACHE_MISS: IntCounterVec = register_int_counter_vec!(
265        "greptime_mito_cache_miss",
266        "mito cache miss",
267        &[TYPE_LABEL]
268    )
269    .unwrap();
270    /// Cache size in bytes.
271    pub static ref CACHE_BYTES: IntGaugeVec = register_int_gauge_vec!(
272        "greptime_mito_cache_bytes",
273        "mito cache bytes",
274        &[TYPE_LABEL]
275    )
276    .unwrap();
277    /// Download bytes counter in the write cache.
278    pub static ref WRITE_CACHE_DOWNLOAD_BYTES_TOTAL: IntCounter = register_int_counter!(
279        "mito_write_cache_download_bytes_total",
280        "mito write cache download bytes total",
281    ).unwrap();
282    /// Timer of the downloading task in the write cache.
283    pub static ref WRITE_CACHE_DOWNLOAD_ELAPSED: HistogramVec = register_histogram_vec!(
284        "mito_write_cache_download_elapsed",
285        "mito write cache download elapsed",
286        &[TYPE_LABEL],
287        // 0.1 ~ 10000
288        exponential_buckets(0.1, 10.0, 6).unwrap(),
289    ).unwrap();
290    /// Number of inflight download tasks.
291    pub static ref WRITE_CACHE_INFLIGHT_DOWNLOAD: IntGauge = register_int_gauge!(
292        "mito_write_cache_inflight_download_count",
293        "mito write cache inflight download tasks",
294    ).unwrap();
295    /// Upload bytes counter.
296    pub static ref UPLOAD_BYTES_TOTAL: IntCounter = register_int_counter!(
297        "mito_upload_bytes_total",
298        "mito upload bytes total",
299    )
300    .unwrap();
301    /// Cache eviction counter, labeled with cache type and eviction reason.
302    pub static ref CACHE_EVICTION: IntCounterVec = register_int_counter_vec!(
303        "greptime_mito_cache_eviction",
304        "mito cache eviction",
305        &[TYPE_LABEL, CACHE_EVICTION_CAUSE]
306    ).unwrap();
307}
308
309// Index metrics.
310lazy_static! {
311    // Index metrics.
312    /// Timer of index application.
313    pub static ref INDEX_APPLY_ELAPSED: HistogramVec = register_histogram_vec!(
314        "greptime_index_apply_elapsed",
315        "index apply elapsed",
316        &[TYPE_LABEL],
317        // 0.01 ~ 1000
318        exponential_buckets(0.01, 10.0, 6).unwrap(),
319    )
320    .unwrap();
321    /// Gauge of index apply memory usage.
322    pub static ref INDEX_APPLY_MEMORY_USAGE: IntGauge = register_int_gauge!(
323        "greptime_index_apply_memory_usage",
324        "index apply memory usage",
325    )
326    .unwrap();
327    /// Timer of index creation.
328    pub static ref INDEX_CREATE_ELAPSED: HistogramVec = register_histogram_vec!(
329        "greptime_index_create_elapsed",
330        "index create elapsed",
331        &[STAGE_LABEL, TYPE_LABEL],
332        // 0.1 ~ 10000
333        exponential_buckets(0.1, 10.0, 6).unwrap(),
334    )
335    .unwrap();
336    /// Counter of rows indexed.
337    pub static ref INDEX_CREATE_ROWS_TOTAL: IntCounterVec = register_int_counter_vec!(
338        "greptime_index_create_rows_total",
339        "index create rows total",
340        &[TYPE_LABEL],
341    )
342    .unwrap();
343    /// Counter of created index bytes.
344    pub static ref INDEX_CREATE_BYTES_TOTAL: IntCounterVec = register_int_counter_vec!(
345        "greptime_index_create_bytes_total",
346        "index create bytes total",
347        &[TYPE_LABEL],
348    )
349    .unwrap();
350    /// Gauge of index create memory usage.
351    pub static ref INDEX_CREATE_MEMORY_USAGE: IntGaugeVec = register_int_gauge_vec!(
352        "greptime_index_create_memory_usage",
353        "index create memory usage",
354        &[TYPE_LABEL],
355    ).unwrap();
356    /// Counter of r/w bytes on index related IO operations.
357    pub static ref INDEX_IO_BYTES_TOTAL: IntCounterVec = register_int_counter_vec!(
358        "greptime_index_io_bytes_total",
359        "index io bytes total",
360        &[TYPE_LABEL, FILE_TYPE_LABEL]
361    )
362    .unwrap();
363    /// Counter of read bytes on puffin files.
364    pub static ref INDEX_PUFFIN_READ_BYTES_TOTAL: IntCounter = INDEX_IO_BYTES_TOTAL
365        .with_label_values(&["read", "puffin"]);
366    /// Counter of write bytes on puffin files.
367    pub static ref INDEX_PUFFIN_WRITE_BYTES_TOTAL: IntCounter = INDEX_IO_BYTES_TOTAL
368        .with_label_values(&["write", "puffin"]);
369    /// Counter of read bytes on intermediate files.
370    pub static ref INDEX_INTERMEDIATE_READ_BYTES_TOTAL: IntCounter = INDEX_IO_BYTES_TOTAL
371        .with_label_values(&["read", "intermediate"]);
372    /// Counter of write bytes on intermediate files.
373    pub static ref INDEX_INTERMEDIATE_WRITE_BYTES_TOTAL: IntCounter = INDEX_IO_BYTES_TOTAL
374        .with_label_values(&["write", "intermediate"]);
375
376    /// Counter of r/w operations on index related IO operations, e.g. read, write, seek and flush.
377    pub static ref INDEX_IO_OP_TOTAL: IntCounterVec = register_int_counter_vec!(
378        "greptime_index_io_op_total",
379        "index io op total",
380        &[TYPE_LABEL, FILE_TYPE_LABEL]
381    )
382    .unwrap();
383    /// Counter of read operations on puffin files.
384    pub static ref INDEX_PUFFIN_READ_OP_TOTAL: IntCounter = INDEX_IO_OP_TOTAL
385        .with_label_values(&["read", "puffin"]);
386    /// Counter of seek operations on puffin files.
387    pub static ref INDEX_PUFFIN_SEEK_OP_TOTAL: IntCounter = INDEX_IO_OP_TOTAL
388        .with_label_values(&["seek", "puffin"]);
389    /// Counter of write operations on puffin files.
390    pub static ref INDEX_PUFFIN_WRITE_OP_TOTAL: IntCounter = INDEX_IO_OP_TOTAL
391        .with_label_values(&["write", "puffin"]);
392    /// Counter of flush operations on puffin files.
393    pub static ref INDEX_PUFFIN_FLUSH_OP_TOTAL: IntCounter = INDEX_IO_OP_TOTAL
394        .with_label_values(&["flush", "puffin"]);
395    /// Counter of read operations on intermediate files.
396    pub static ref INDEX_INTERMEDIATE_READ_OP_TOTAL: IntCounter = INDEX_IO_OP_TOTAL
397        .with_label_values(&["read", "intermediate"]);
398    /// Counter of seek operations on intermediate files.
399    pub static ref INDEX_INTERMEDIATE_SEEK_OP_TOTAL: IntCounter = INDEX_IO_OP_TOTAL
400        .with_label_values(&["seek", "intermediate"]);
401    /// Counter of write operations on intermediate files.
402    pub static ref INDEX_INTERMEDIATE_WRITE_OP_TOTAL: IntCounter = INDEX_IO_OP_TOTAL
403        .with_label_values(&["write", "intermediate"]);
404    /// Counter of flush operations on intermediate files.
405    pub static ref INDEX_INTERMEDIATE_FLUSH_OP_TOTAL: IntCounter = INDEX_IO_OP_TOTAL
406        .with_label_values(&["flush", "intermediate"]);
407}
408
409lazy_static! {
410    /// Partition tree memtable data buffer freeze metrics
411    pub static ref PARTITION_TREE_DATA_BUFFER_FREEZE_STAGE_ELAPSED: HistogramVec = register_histogram_vec!(
412        "greptime_partition_tree_buffer_freeze_stage_elapsed",
413        "mito partition tree data buffer freeze stage elapsed",
414        &[STAGE_LABEL],
415        // 0.01 ~ 1000
416        exponential_buckets(0.01, 10.0, 6).unwrap(),
417    )
418    .unwrap();
419
420    /// Partition tree memtable read path metrics
421    pub static ref PARTITION_TREE_READ_STAGE_ELAPSED: HistogramVec = register_histogram_vec!(
422        "greptime_partition_tree_read_stage_elapsed",
423        "mito partition tree read stage elapsed",
424        &[STAGE_LABEL],
425        // 0.01 ~ 1000
426        exponential_buckets(0.01, 10.0, 6).unwrap(),
427    )
428    .unwrap();
429
430    // ------- End of partition tree memtable metrics.
431
432
433    // Manifest related metrics:
434
435    /// Elapsed time of manifest operation. Labeled with "op".
436    pub static ref MANIFEST_OP_ELAPSED: HistogramVec = register_histogram_vec!(
437        "greptime_manifest_op_elapsed",
438        "mito manifest operation elapsed",
439        &["op"],
440        // 0.01 ~ 1000
441        exponential_buckets(0.01, 10.0, 6).unwrap(),
442    ).unwrap();
443
444
445    pub static ref REGION_WORKER_HANDLE_WRITE_ELAPSED: HistogramVec = register_histogram_vec!(
446        "greptime_region_worker_handle_write",
447        "elapsed time for handling writes in region worker loop",
448        &["stage"],
449        exponential_buckets(0.001, 10.0, 5).unwrap()
450    ).unwrap();
451
452}
453
454lazy_static! {
455    /// Counter for compaction input file size.
456    pub static ref COMPACTION_INPUT_BYTES: Counter = register_counter!(
457        "greptime_mito_compaction_input_bytes",
458        "mito compaction input file size",
459        ).unwrap();
460
461    /// Counter for compaction output file size.
462    pub static ref COMPACTION_OUTPUT_BYTES: Counter = register_counter!(
463        "greptime_mito_compaction_output_bytes",
464        "mito compaction output file size",
465        ).unwrap();
466
467    /// Active series count in TimeSeriesMemtable
468    pub static ref MEMTABLE_ACTIVE_SERIES_COUNT: IntGauge = register_int_gauge!(
469        "greptime_mito_memtable_active_series_count",
470        "active time series count in TimeSeriesMemtable",
471        ).unwrap();
472
473    /// Active field builder count in TimeSeriesMemtable
474    pub static ref MEMTABLE_ACTIVE_FIELD_BUILDER_COUNT: IntGauge = register_int_gauge!(
475        "greptime_mito_memtable_field_builder_count",
476        "active field builder count in TimeSeriesMemtable",
477        ).unwrap();
478
479    /// Number of stalling write requests in each worker.
480    pub static ref WRITE_STALLING: IntGaugeVec = register_int_gauge_vec!(
481            "greptime_mito_write_stalling_count",
482            "mito stalled write request in each worker",
483            &[WORKER_LABEL]
484        ).unwrap();
485    /// Number of ref files
486    pub static ref GC_REF_FILE_CNT: IntGauge = register_int_gauge!(
487            "greptime_gc_ref_file_count",
488            "gc ref file count",
489        ).unwrap();
490    /// Total number of stalled write requests.
491    pub static ref WRITE_STALL_TOTAL: IntCounter = register_int_counter!(
492        "greptime_mito_write_stall_total",
493        "Total number of stalled write requests"
494    ).unwrap();
495    /// Time waiting for requests to be handled by the region worker.
496    pub static ref REQUEST_WAIT_TIME: HistogramVec = register_histogram_vec!(
497            "greptime_mito_request_wait_time",
498            "mito request wait time before being handled by region worker",
499            &[WORKER_LABEL],
500            // 0.001 ~ 10000
501            exponential_buckets(0.001, 10.0, 8).unwrap(),
502        )
503        .unwrap();
504
505    /// Counter for the number of files deleted by the GC worker.
506    pub static ref GC_DELETE_FILE_CNT: IntGauge =
507        register_int_gauge!(
508            "greptime_mito_gc_delete_file_count",
509            "mito gc deleted file count",
510        ).unwrap();
511
512    /// Counter for the number of unparsable files skipped by GC.
513    pub static ref GC_SKIPPED_UNPARSABLE_FILES: IntCounter =
514        register_int_counter!(
515            "greptime_mito_gc_skipped_unparsable_files",
516            "mito gc skipped unparsable files count",
517        ).unwrap();
518
519    /// Counter for the number of orphaned index files found by GC.
520    pub static ref GC_ORPHANED_INDEX_FILES: IntCounter =
521        register_int_counter!(
522            "greptime_mito_gc_orphaned_index_files",
523            "mito gc orphaned index files count",
524        ).unwrap();
525
526    /// Total number of files downloaded during cache fill on region open.
527    pub static ref CACHE_FILL_DOWNLOADED_FILES: IntCounter = register_int_counter!(
528        "mito_cache_fill_downloaded_files",
529        "mito cache fill downloaded files count",
530    ).unwrap();
531
532    /// Number of files pending download during cache fill on region open.
533    pub static ref CACHE_FILL_PENDING_FILES: IntGauge = register_int_gauge!(
534        "mito_cache_fill_pending_files",
535        "mito cache fill pending files count",
536    ).unwrap();
537}
538
539/// Stager notifier to collect metrics.
540pub struct StagerMetrics {
541    cache_hit: IntCounter,
542    cache_miss: IntCounter,
543    staging_cache_bytes: IntGauge,
544    recycle_cache_bytes: IntGauge,
545    cache_eviction: IntCounter,
546    staging_miss_read: Histogram,
547}
548
549impl StagerMetrics {
550    /// Creates a new stager notifier.
551    pub fn new() -> Self {
552        Self {
553            cache_hit: CACHE_HIT.with_label_values(&[STAGING_TYPE]),
554            cache_miss: CACHE_MISS.with_label_values(&[STAGING_TYPE]),
555            staging_cache_bytes: CACHE_BYTES.with_label_values(&[STAGING_TYPE]),
556            recycle_cache_bytes: CACHE_BYTES.with_label_values(&[RECYCLE_TYPE]),
557            cache_eviction: CACHE_EVICTION.with_label_values(&[STAGING_TYPE, "size"]),
558            staging_miss_read: READ_STAGE_ELAPSED.with_label_values(&["staging_miss_read"]),
559        }
560    }
561}
562
563impl Default for StagerMetrics {
564    fn default() -> Self {
565        Self::new()
566    }
567}
568
569impl StagerNotifier for StagerMetrics {
570    fn on_cache_hit(&self, _size: u64) {
571        self.cache_hit.inc();
572    }
573
574    fn on_cache_miss(&self, _size: u64) {
575        self.cache_miss.inc();
576    }
577
578    fn on_cache_insert(&self, size: u64) {
579        self.staging_cache_bytes.add(size as i64);
580    }
581
582    fn on_load_dir(&self, duration: Duration) {
583        self.staging_miss_read.observe(duration.as_secs_f64());
584    }
585
586    fn on_load_blob(&self, duration: Duration) {
587        self.staging_miss_read.observe(duration.as_secs_f64());
588    }
589
590    fn on_cache_evict(&self, size: u64) {
591        self.cache_eviction.inc();
592        self.staging_cache_bytes.sub(size as i64);
593    }
594
595    fn on_recycle_insert(&self, size: u64) {
596        self.recycle_cache_bytes.add(size as i64);
597    }
598
599    fn on_recycle_clear(&self, size: u64) {
600        self.recycle_cache_bytes.sub(size as i64);
601    }
602}
mito2/metrics.rs

mito2/
metrics.rs
