Like Prometheus, but for logs.

prometheushacktoberfestgrafanacloudnativeloggingloki

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Salva Corts 87a659a6db Add span events for index stats and result cache (#9552) ... **What this PR does / why we need it**: This PR adds events to the traces to have some extra observability for how we compute the index stats. We also add some trace events to the results cache.      **Special notes for your reviewer**: **Checklist** - [ ] Reviewed the [`CONTRIBUTING.md`](https://github.com/grafana/loki/blob/main/CONTRIBUTING.md) guide (**required**) - [ ] Documentation added - [ ] Tests updated - [ ] `CHANGELOG.md` updated - [ ] Changes that require user attention or interaction to upgrade are documented in `docs/sources/upgrading/_index.md` - [ ] For Helm chart changes bump the Helm chart version in `production/helm/loki/Chart.yaml` and update `production/helm/loki/CHANGELOG.md` and `production/helm/loki/README.md`. [Example PR](d10549e3ec)		3 years ago
..
queryrangebase	Add span events for index stats and result cache (#9552)	3 years ago
benchmarkutils_test.go	…
codec.go	Expose optional label matcher for label values handler (#8824)	3 years ago
codec_test.go	Revert "Augment statistics.." PR 9400. (#9430)	3 years ago
downstreamer.go	Update Prometheus dependency (#9205)	3 years ago
downstreamer_test.go	Update Prometheus dependency (#9205)	3 years ago
extensions.go	TSDB/query-planning-groundwork (#6367)	4 years ago
index_stats_cache.go	Slight improvements to `GetFactorOfTime` (#9473)	3 years ago
index_stats_cache_test.go	Cache index stats requests (#8972)	3 years ago
limits.go	Pass engine opts down to middlewares (#9130)	3 years ago
limits_test.go	Update Prometheus dependency (#9205)	3 years ago
log_result_cache.go	Loki: Improve spans usage (#8927)	3 years ago
log_result_cache_test.go	fix bugs in logs results caching and its tests (#7925)	3 years ago
metrics.go	adds result cache key version comparison metrics (#7323)	3 years ago
ordering.go	…
prometheus.go	Cache index stats requests (#8972)	3 years ago
prometheus_test.go	Revert "Augment statistics.." PR 9400. (#9430)	3 years ago
queryrange.pb.go	Expose optional label matcher for label values handler (#8824)	3 years ago
queryrange.proto	Expose optional label matcher for label values handler (#8824)	3 years ago
querysharding.go	Cache index stats requests (#8972)	3 years ago
querysharding_test.go	Cache index stats requests (#8972)	3 years ago
roundtrip.go	Flag to disable index stats cache (#9177)	3 years ago
roundtrip_test.go	Update Prometheus dependency (#9205)	3 years ago
shard_resolver.go	Pass engine opts down to middlewares (#9130)	3 years ago
shard_resolver_test.go	Max bytes read limit (#8670)	3 years ago
split_by_interval.go	Expose optional label matcher for label values handler (#8824)	3 years ago
split_by_interval_test.go	Max bytes read limit (#8670)	3 years ago
split_by_range.go	Pass engine opts down to middlewares (#9130)	3 years ago
split_by_range_test.go	Pass engine opts down to middlewares (#9130)	3 years ago
stats.go	Expose optional label matcher for label values handler (#8824)	3 years ago
stats_test.go	fix(stats_collector): Do not collect stats for failed requests. (#6878)	3 years ago