Grafana Cloud Application Observability vs PoWA

Grafana Cloud Application Observability monitors applications and brings OpenTelemetry and Prometheus data together to help software engineers investigate anomalies and their causes. Its knowledge graph discovers services and relationships from telemetry, while the service catalog displays latency, error ratio, and request rate for each service. The RCA workbench and Entity Graph help investigate correlated problems across a stack. Metrics, logs, traces, and profiles share a unified view, with drill-down from a service into its signals. Grafana identifies Alloy as a collector with native pipelines for OpenTelemetry and Prometheus. The free plan includes up to 2,232 host hours per month and community support. Pro is listed at $0.03 a month, with a $19 monthly platform fee and $0.025 per host hour; host hours and application telemetry are billed at standard Grafana Cloud rates. Serverless usage is billed on telemetry ingested instead of host hours. The cloud service runs on Linux, macOS, Windows, and the web.

PoWA is a free, self-hosted tool for monitoring and tuning PostgreSQL. It collects and aggregates performance metrics from database instances and presents them in charts. Local mode handles one instance; remote mode gathers metrics from multiple instances into a repository server and can include read-only standbys without restarting PostgreSQL when adding them. The project combines the powa-archivist extension and powa-web interface, with an optional powa-collector daemon for remote deployments. Supported statistics extensions include pg_stat_statements, pg_qualstats, pg_stat_kcache, pg_wait_sampling, and pg_track_settings; pg_stat_statements is mandatory, and the current version targets PostgreSQL 9.4 and newer. HypoPG support enables testing hypothetical indexes without creating real ones. PoWA 5 adds datasource views for replication, background writer, checkpointer, SLRU, WAL, and PostgreSQL 16 or newer I/O statistics, plus per-database snapshots. Metrics can be enabled or disabled, and custom extensions added without modifying PoWA.