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Ed Welch a4eb536fb2 Loki: remove `subqueries` from metrics.go logging and replace it with separate split and shard counters (#8761) ... **What this PR does / why we need it**: Currently the `metrics.go` log line emitted after every query includes a metric called "subqueries". This currently tracks the number of queries created by the split_by_time operations done in Loki, but does not include any counts for subqueries created as a result of sharding. It becomes difficult to make a single subqueries counter that gives useful information to determine how much a query is split by time and sharded by a shard factor, especially now that sharding in TSDB indexes is dynamic. This PR removes and deprecates the `subqueries` stat and instead creates a `splits` and `shards` statistic which records how much a query was split_by_time and the total number of shards created as well. **Which issue(s) this PR fixes**: Fixes #<issue number> **Special notes for your reviewer**: **Checklist** - [ ] Reviewed the [`CONTRIBUTING.md`](https://github.com/grafana/loki/blob/main/CONTRIBUTING.md) guide (**required**) - [ ] Documentation added - [x] Tests updated - [x] `CHANGELOG.md` updated - [ ] Changes that require user attention or interaction to upgrade are documented in `docs/sources/upgrading/_index.md` --------- Signed-off-by: Edward Welch <edward.welch@grafana.com>		3 years ago
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context.go	Loki: remove `subqueries` from metrics.go logging and replace it with separate split and shard counters (#8761)	3 years ago
context_test.go	Loki: remove `subqueries` from metrics.go logging and replace it with separate split and shard counters (#8761)	3 years ago
stats.pb.go	Loki: remove `subqueries` from metrics.go logging and replace it with separate split and shard counters (#8761)	3 years ago
stats.proto	Loki: remove `subqueries` from metrics.go logging and replace it with separate split and shard counters (#8761)	3 years ago