CHANGELOG.

Author: tcard

CHANGELOG.md

@@ -67,6 +67,7 @@
 * [ENHANCEMENT] Usage tracker: `loadSnapshot()` checks shard emptiness instead of using explicit `first` parameter. #13534
 * [ENHANCEMENT] OTLP: Add metric `cortex_distributor_otlp_requests_by_content_type_total` to track content type (json or proto) of OTLP packets. #13525
 * [ENHANCEMENT] OTLP: Add experimental metric `cortex_distributor_otlp_array_lengths` to better understand the layout of OTLP packets in practice. #13525
+* [ENHANCEMENT] Add experimental flag `common.instrument-reference-leaks-pct` to leaked references to gRPC buffers. #13609
 * [BUGFIX] Compactor: Fix potential concurrent map writes. #13053
 * [BUGFIX] Query-frontend: Fix issue where queries sometimes fail with `failed to receive query result stream message: rpc error: code = Canceled desc = context canceled` if remote execution is enabled. #13084
 * [BUGFIX] Query-frontend: Fix issue where query stats, such as series read, did not include the parameters to the `histogram_quantile` and `histogram_fraction` functions if remote execution was enabled. #13084

cmd/mimir/config-descriptor.json

@@ -20749,6 +20749,17 @@
           ],
           "fieldValue": null,
           "fieldDefaultValue": null
+        },
+        {
+          "kind": "field",
+          "name": "instrument_ref_leaks_pct",
+          "required": false,
+          "desc": "Percentage of buffers from pools to instrument for reference leaks. 0 to disable.",
+          "fieldValue": null,
+          "fieldDefaultValue": 0,
+          "fieldFlag": "common.instrument-reference-leaks-pct",
+          "fieldType": "float",
+          "fieldCategory": "experimental"
         }
       ],
       "fieldValue": null,

cmd/mimir/help-all.txt.tmpl

@@ -857,6 +857,8 @@ Usage of ./cmd/mimir/mimir:
     	TSDB WAL segments files max size (bytes). (default 134217728)
   -common.client-cluster-validation.label string
     	[experimental] Primary cluster validation label.
+  -common.instrument-reference-leaks-pct float
+    	[experimental] Percentage of buffers from pools to instrument for reference leaks. 0 to disable.
   -common.storage.azure.account-key string
     	Azure storage account key. If unset, Azure managed identities will be used for authentication instead.
   -common.storage.azure.account-name string

operations/mimir/mimir-flags-defaults.json

@@ -1473,6 +1473,7 @@
   "common.storage.swift.request-timeout": 5000000000,
   "common.storage.filesystem.dir": "",
   "common.client-cluster-validation.label": "",
+  "common.instrument-reference-leaks-pct": 0,
   "timeseries-unmarshal-caching-optimization-enabled": true,
   "cost-attribution.eviction-interval": 1200000000000,
   "cost-attribution.registry-path": "",