Remove MimirProvisioningTooManyActiveSeries alert (#5593)

Signed-off-by: Marco Pracucci <marco@pracucci.com>

CHANGELOG.md

@@ -76,6 +76,7 @@
 * [CHANGE] Dashboards: removed "Query results cache misses" panel on the "Mimir / Queries" dashboard. #5423
 * [CHANGE] Dashboards: default to shared crosshair on all dashboards. #5489
 * [CHANGE] Dashboards: sort variable drop-down lists from A to Z, rather than Z to A. #5490
+* [CHANGE] Alerts: removed `MimirProvisioningTooManyActiveSeries` alert. You should configure `-ingester.instance-limits.max-series` and rely on `MimirIngesterReachingSeriesLimit` alert instead. #5593
 * [ENHANCEMENT] Dashboards: adjust layout of "rollout progress" dashboard panels so that the "rollout progress" panel doesn't require scrolling. #5113
 * [ENHANCEMENT] Dashboards: show container name first in "pods count per version" panel on "rollout progress" dashboard. #5113
 * [ENHANCEMENT] Dashboards: show time spend waiting for turn when lazy loading index headers in the "index-header lazy load gate latency" panel on the "queries" dashboard. #5313

docs/sources/mimir/manage/mimir-runbooks/_index.md

@@ -204,7 +204,7 @@ How to **investigate**:
   - **`ingester`**
     - Typically, ingester p99 latency is in the range 5-50ms. If the ingester latency is higher than this, you should investigate the root cause before scaling up ingesters.
     - Check out the following alerts and fix them if firing:
-      - `MimirProvisioningTooManyActiveSeries`
+      - `MimirIngesterReachingSeriesLimit`
       - `MimirProvisioningTooManyWrites`
 
 #### Read Latency
@@ -776,20 +776,6 @@ How to **investigate**:
   - `other`
     - Check both Mimir and cache logs to find more details
 
-### MimirProvisioningTooManyActiveSeries
-
-This alert fires if the average number of in-memory series per ingester is above our target (1.5M).
-
-How to **fix** it:
-
-- Scale up ingesters
-  - To find out the Mimir clusters where ingesters should be scaled up and how many minimum replicas are expected:
-    ```
-    ceil(sum by(cluster, namespace) (cortex_ingester_memory_series) / 1.5e6) >
-    count by(cluster, namespace) (cortex_ingester_memory_series)
-    ```
-- After the scale up, the in-memory series are expected to be reduced at the next TSDB head compaction (occurring every 2h)
-
 ### MimirProvisioningTooManyWrites
 
 This alert fires if the average number of samples ingested / sec in ingesters is above our target.

operations/helm/tests/metamonitoring-values-generated/mimir-distributed/templates/metamonitoring/mixin-alerts.yaml

@@ -364,16 +364,6 @@ spec:
         severity: critical
   - name: mimir-provisioning
     rules:
-    - alert: MimirProvisioningTooManyActiveSeries
-      annotations:
-        message: |
-          The number of in-memory series per ingester in {{ $labels.cluster }}/{{ $labels.namespace }} is too high.
-        runbook_url: https://grafana.com/docs/mimir/latest/operators-guide/mimir-runbooks/#mimirprovisioningtoomanyactiveseries
-      expr: |
-        avg by (cluster, namespace) (cortex_ingester_memory_series) > 1.6e6
-      for: 2h
-      labels:
-        severity: warning
     - alert: MimirProvisioningTooManyWrites
       annotations:
         message: |

operations/mimir-mixin-compiled-baremetal/alerts.yaml

@@ -352,16 +352,6 @@ groups:
       severity: critical
 - name: mimir-provisioning
   rules:
-  - alert: MimirProvisioningTooManyActiveSeries
-    annotations:
-      message: |
-        The number of in-memory series per ingester in {{ $labels.cluster }}/{{ $labels.namespace }} is too high.
-      runbook_url: https://grafana.com/docs/mimir/latest/operators-guide/mimir-runbooks/#mimirprovisioningtoomanyactiveseries
-    expr: |
-      avg by (cluster, namespace) (cortex_ingester_memory_series) > 1.6e6
-    for: 2h
-    labels:
-      severity: warning
   - alert: MimirProvisioningTooManyWrites
     annotations:
       message: |

operations/mimir-mixin-compiled/alerts.yaml

@@ -352,16 +352,6 @@ groups:
       severity: critical
 - name: mimir-provisioning
   rules:
-  - alert: MimirProvisioningTooManyActiveSeries
-    annotations:
-      message: |
-        The number of in-memory series per ingester in {{ $labels.cluster }}/{{ $labels.namespace }} is too high.
-      runbook_url: https://grafana.com/docs/mimir/latest/operators-guide/mimir-runbooks/#mimirprovisioningtoomanyactiveseries
-    expr: |
-      avg by (cluster, namespace) (cortex_ingester_memory_series) > 1.6e6
-    for: 2h
-    labels:
-      severity: warning
   - alert: MimirProvisioningTooManyWrites
     annotations:
       message: |

operations/mimir-mixin/alerts/alerts.libsonnet

@@ -538,24 +538,6 @@ local utils = import 'mixin-utils/utils.libsonnet';
     {
       name: 'mimir-provisioning',
       rules: [
-        {
-          alert: $.alertName('ProvisioningTooManyActiveSeries'),
-          // We target each ingester to 1.5M in-memory series. This alert fires if the average
-          // number of series / ingester in a Mimir cluster is > 1.6M for 2h (we compact
-          // the TSDB head every 2h).
-          expr: |||
-            avg by (%s) (cortex_ingester_memory_series) > 1.6e6
-          ||| % [$._config.alert_aggregation_labels],
-          'for': '2h',
-          labels: {
-            severity: 'warning',
-          },
-          annotations: {
-            message: |||
-              The number of in-memory series per ingester in %(alert_aggregation_variables)s is too high.
-            ||| % $._config,
-          },
-        },
         {
           alert: $.alertName('ProvisioningTooManyWrites'),
           // 80k writes / s per ingester max.