add changelog

CHANGELOG.md

@@ -37,6 +37,7 @@
 * [10727](https://github.com/grafana/loki/pull/10727) **sandeepsukhani** Native otlp ingestion support
 * [11051](https://github.com/grafana/loki/pull/11051) Refactor to not use global logger in modules
 * [10956](https://github.com/grafana/loki/pull/10956) **jeschkies** do not wrap requests but send pure Protobuf from frontend v2 via scheduler to querier when `-frontend.encoding=protobuf`.
+* [11284](https://github.com/grafana/loki/pull/11284) **ashwanthgoli** Config: Adds `frontend.max-query-capacity` to tune per-tenant query capacity.
 
 ##### Fixes
 * [11074](https://github.com/grafana/loki/pull/11074) **hainenber** Fix panic in lambda-promtail due to mishandling of empty DROP_LABELS env var.

docs/sources/configure/_index.md

@@ -2735,6 +2735,20 @@ The `limits_config` block configures global and per-tenant limits in Loki.
 # CLI flag: -frontend.max-queriers-per-tenant
 [max_queriers_per_tenant: <int> | default = 0]
 
+# How much of the available query capacity (queriers) can be used by a single
+# tenant. Allowed values are 0.0 to 1.0. For example, setting this to 0.5 would
+# allow a tenant to use half of the available queriers for processing the query
+# workload. If set to 0, query capacity is determined by
+# frontend.max-queriers-per-tenant. When both frontend.max-queriers-per-tenant
+# and frontend.max-query-capacity are configured, smaller value of the resulting
+# querier replica count is considered: min(frontend.max-queriers-per-tenant,
+# ceil(querier_replicas * frontend.max-query-capacity)). *All* queriers will
+# handle requests for the tenant if neither limits are applied. This option only
+# works with queriers connecting to the query-frontend / query-scheduler, not
+# when using downstream URL.
+# CLI flag: -frontend.max-query-capacity
+[max_query_capacity: <float> | default = 0]
+
 # Number of days of index to be kept always downloaded for queries. Applies only
 # to per user index in boltdb-shipper index store. 0 to disable.
 # CLI flag: -store.query-ready-index-num-days