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feat(bloom-gw): Add
metrics.go style log line to bloom gateway `Fil…
…terChunks` call (#12354) This PR adds a "metrics.go" style log line to the bloom gateway that contains latencies for queueing, processing, post-processing, as well as number of chunks/series requested/filtered. This log line should give operators a better understanding where time is spent for individual requests. Example log line: ``` ts=2024-03-26T13:16:11.869619964Z caller=spanlogger.go:109 component=bloom-gateway tenant=XXX method=bloomgateway.FilterChunkRefs user=XXX traceID=6239d49e1e88f88645bd7f1f6f1b85c8 level=info status=success tasks=1 series_requested=35 series_filtered=31 chunks_requested=103 chunks_filtered=93 queue_time=4.108128936s metas_fetch_time=22.040408ms blocks_fetch_time=1.284575ms processing_time=30.215863002s post_processing_time=16.084µs ``` Signed-off-by: Christian Haudum <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,90 @@ | ||
| package bloomgateway | ||
|
|
||
| import ( | ||
| "context" | ||
| "time" | ||
|
|
||
| "go.uber.org/atomic" | ||
| ) | ||
|
|
||
| type Stats struct { | ||
| Status string | ||
| NumTasks, NumFilters int | ||
| ChunksRequested, ChunksFiltered, SeriesRequested, SeriesFiltered int | ||
| QueueTime, MetasFetchTime, BlocksFetchTime, ProcessingTime, PostProcessingTime atomic.Duration | ||
| } | ||
|
|
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| type statsKey int | ||
|
|
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| var ctxKey = statsKey(0) | ||
|
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| // ContextWithEmptyStats returns a context with empty stats. | ||
| func ContextWithEmptyStats(ctx context.Context) (*Stats, context.Context) { | ||
| stats := &Stats{Status: "unknown"} | ||
| ctx = context.WithValue(ctx, ctxKey, stats) | ||
| return stats, ctx | ||
| } | ||
|
|
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| // FromContext gets the Stats out of the Context. Returns nil if stats have not | ||
| // been initialised in the context. | ||
| func FromContext(ctx context.Context) *Stats { | ||
| o := ctx.Value(ctxKey) | ||
| if o == nil { | ||
| return nil | ||
| } | ||
| return o.(*Stats) | ||
| } | ||
|
|
||
| func (s *Stats) KVArgs() []any { | ||
| if s == nil { | ||
| return []any{} | ||
| } | ||
| return []any{ | ||
| "status", s.Status, | ||
| "tasks", s.NumTasks, | ||
| "series_requested", s.SeriesRequested, | ||
| "series_filtered", s.SeriesFiltered, | ||
| "chunks_requested", s.ChunksRequested, | ||
| "chunks_filtered", s.ChunksFiltered, | ||
| "queue_time", s.QueueTime.Load(), | ||
| "metas_fetch_time", s.MetasFetchTime.Load(), | ||
| "blocks_fetch_time", s.BlocksFetchTime.Load(), | ||
| "processing_time", s.ProcessingTime.Load(), | ||
| "post_processing_time", s.PostProcessingTime.Load(), | ||
| } | ||
| } | ||
|
|
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| func (s *Stats) AddQueueTime(t time.Duration) { | ||
| if s == nil { | ||
| return | ||
| } | ||
| s.QueueTime.Add(t) | ||
| } | ||
|
|
||
| func (s *Stats) AddMetasFetchTime(t time.Duration) { | ||
| if s == nil { | ||
| return | ||
| } | ||
| s.MetasFetchTime.Add(t) | ||
| } | ||
|
|
||
| func (s *Stats) AddBlocksFetchTime(t time.Duration) { | ||
| if s == nil { | ||
| return | ||
| } | ||
| s.BlocksFetchTime.Add(t) | ||
| } | ||
|
|
||
| func (s *Stats) AddProcessingTime(t time.Duration) { | ||
| if s == nil { | ||
| return | ||
| } | ||
| s.ProcessingTime.Add(t) | ||
| } | ||
|
|
||
| func (s *Stats) AddPostProcessingTime(t time.Duration) { | ||
| if s == nil { | ||
| return | ||
| } | ||
| s.PostProcessingTime.Add(t) | ||
| } |
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