fix: tune vmsingle resource limits and query settings

[zackpollard]

• remove explicit search.maxUniqueTimeseries cap (600k) to let vm auto-calculate (~4.3m with 32gi)
• add search.logSlowQueryDuration for query observability
• bump vmsingle memory from 8gi to 32gi with proper requests
• add cpu/memory requests for both vmsingle and vmagent

[github-actions]

--- kubernetes/apps/monitoring/victoria-metrics/app Kustomization: flux-system/victoria-metrics HelmRelease: monitoring/victoria-metrics

+++ kubernetes/apps/monitoring/victoria-metrics/app Kustomization: flux-system/victoria-metrics HelmRelease: monitoring/victoria-metrics

@@ -49,16 +49,22 @@

     vmagent:
       spec:
         resources:
           limits:
             cpu: 2000m
             memory: 1Gi
+          requests:
+            cpu: 500m
+            memory: 512Mi
     vmalert:
       enabled: false
     vmsingle:
       spec:
         extraArgs:
-          search.maxUniqueTimeseries: '600000'
+          search.logSlowQueryDuration: 3s
         resources:
           limits:
-            memory: 8Gi
+            memory: 32Gi
+          requests:
+            cpu: 2000m
+            memory: 32Gi
 

[github-actions]

--- HelmRelease: monitoring/victoria-metrics VMAgent: monitoring/vmetrics

+++ HelmRelease: monitoring/victoria-metrics VMAgent: monitoring/vmetrics

@@ -20,9 +20,12 @@

   remoteWrite:
   - url: http://vmsingle-vmetrics.monitoring.svc.cluster.local.:8428/api/v1/write
   resources:
     limits:
       cpu: 2000m
       memory: 1Gi
+    requests:
+      cpu: 500m
+      memory: 512Mi
   scrapeInterval: 20s
   selectAllByDefault: true
 
--- HelmRelease: monitoring/victoria-metrics VMSingle: monitoring/vmetrics

+++ HelmRelease: monitoring/victoria-metrics VMSingle: monitoring/vmetrics

@@ -8,20 +8,23 @@

     app.kubernetes.io/component: victoria-metrics-k8s-stack-vmsingle
     app.kubernetes.io/instance: victoria-metrics
     app.kubernetes.io/managed-by: Helm
     app.kubernetes.io/name: victoria-metrics-k8s-stack
 spec:
   extraArgs:
-    search.maxUniqueTimeseries: '600000'
+    search.logSlowQueryDuration: 3s
   image:
     tag: v1.138.0
   port: '8428'
   replicaCount: 1
   resources:
     limits:
-      memory: 8Gi
+      memory: 32Gi
+    requests:
+      cpu: 2000m
+      memory: 32Gi
   retentionPeriod: '1'
   storage:
     accessModes:
     - ReadWriteOnce
     resources:
       requests: