grafana_api_dashboard_get_milliseconds_datadog

Grafana dashboards exhibit slow performance (high read latency, sluggish UI) even when infrastructure metrics (CPU, memory) appear healthy. This occurs when background compaction tasks, query overload, or excessive time-series rendering saturate resources invisibly.

Grafana instances using Cassandra as a backend can experience silent performance degradation when JMX metrics (compaction tasks, heap usage, GC pauses) are not collected. Without JMX visibility, operators miss early warnings of heap exhaustion, compaction backlog, or GC thrashing that manifest as sudden dashboard failures.