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Ashwanth 8bb615c2cc config: loki better defaults (#10793) ... **What this PR does / why we need it**: Updates some of the configuration defaults to provide a better experience for users out of the box. I tried to add notes for non-trivial changes explaining the reason. | configuration | new default | old default | notes | | ------------------------------------------------------ | ----------- | ----------- | -------- | `compactor.delete-max-interval` | 24h | 0 | splits the delete requests into intervals no longer than `delete_max_interval` | | `distributor.max-line-size` | 256KB | 0 | - | | `ingester.sync-period` | 1h | 0 | ensures that the chunk cuts for a given stream are synchronized across the ingesters in the replication set. Helps with deduplicating chunks. | | `ingester.sync-min-utilization` | 0.1 | 0 | ^ | | `frontend.max-querier-bytes-read` | 150GB | 0 | - | | `frontend.max-cache-freshness` | 10m | 1m | avoid caching results for data that is still in churn | | `frontend.max-stats-cache-freshness` | 10m | 0 | avoid caching results for data that is still in churn | | `memcached.batchsize` | 256 | 1024 | - | | `memcached.parallelism` | 10 | 100 | - | | `querier.tsdb-max-query-parallelism` | 128 | 512 | avoid over parallelising queries for smaller installations | | `querier.split-queries-by-interval` | 1h | 30m | avoid over parallelising queries for smaller installations | | `querier.compress-http-responses` | true | false | compress response if the request accepts gzip encoding | | `query-scheduler.max-outstanding-requests-per-tenant` | 32000 | 100 | current default is too small, opening a big dashboard could hit this limit | | `validation.max-label-names-per-series` | 15 | 30 | reducing this to avoid blowing up the series count and index size. Also enforces users to think about what labels are being added. | **Special notes for your reviewer**: regarding `TestQueryTSDB_WithCachedPostings`: removed the assert on get calls as this is hard to get right (splits, querySize mw making stats calls) validating additions to the cache and misses is more important here I think. **Checklist** - [x] Reviewed the [`CONTRIBUTING.md`](https://github.com/grafana/loki/blob/main/CONTRIBUTING.md) guide (**required**) - [x] Documentation added - [x] Tests updated - [x] `CHANGELOG.md` updated - [ ] If the change is worth mentioning in the release notes, add `add-to-release-notes` label - [x] Changes that require user attention or interaction to upgrade are documented in `docs/sources/setup/upgrade/_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)		2 years ago
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queue	Set buckets for querier_wait_seconds histogram. (#10334)	2 years ago
schedulerpb	Upgrade dskit to use packages migrated from weaveworks/common (#10164)	2 years ago
lifecycle.go	Update dskit (#10091)	2 years ago
ringmanager.go	query-scheduler: fix query distribution in SSD mode (#9471)	2 years ago
scheduler.go	config: loki better defaults (#10793)	2 years ago
scheduler_test.go	Upgrade `golangci-lint` and fix linting errors (#9601)	2 years ago