PoWA
What it is
PoWA is a free, self-hosted tool for monitoring and tuning PostgreSQL performance. It gathers statistics from PostgreSQL instances and displays them in charts. Local mode covers one instance, while remote mode collects metrics from multiple instances into a repository server, including read-only standbys. Adding a monitored instance remotely does not require a PostgreSQL restart. The project combines the powa-archivist extension and powa-web interface, with an optional powa-collector daemon for remote deployments. Supported extensions include pg_stat_statements, pg_qualstats, pg_stat_kcache, pg_wait_sampling, and pg_track_settings; pg_stat_statements is required, and the current version targets PostgreSQL 9.4 and newer. HypoPG integration allows hypothetical index testing. PoWA 5 adds views for replication, background writer, checkpointer, SLRU, WAL, newer PostgreSQL I/O statistics, and per-database snapshots. Metrics can be enabled or disabled, and custom extensions added. Documentation notes overhead, disk use, plain-text remote passwords, and HTTPS and access restrictions.
For and against
For
- Free and self-hosted
- Local and multi-instance remote modes
- Supports query and wait statistics
- Hypothetical index testing through HypoPG
- Selectable metrics and custom extensions
Against
- Requires PostgreSQL and pg_stat_statements
- Can add performance overhead and disk usage
- Remote passwords may be stored as plain text
- UI shows queries after two snapshots
The verdict
PoWA offers broad PostgreSQL monitoring with local or repository-based remote deployment. Its extension requirements and documented security and overhead considerations make configuration and administration important.
Who it suits
It suits PostgreSQL administrators who want self-hosted charts, query profiling, wait and lock analysis, and remote monitoring. Users should be comfortable managing PostgreSQL extensions and securing the deployment.
Plans and prices
PoWA
Open project; requires PostgreSQL and pg_stat_statements
Read 7 Oct 2026 · powa.readthedocs.io
On the record
- Configuration flexibility
- Metrics can be selected and enabled or disabled, and users can add custom statistics extensions without modifying PoWA.powa.readthedocs.io · read 7 Oct 2026
- Core components
- The project includes the powa-archivist PostgreSQL extension, the powa-web interface, and an optional powa-collector daemon for remote mode.powa.readthedocs.io · read 7 Oct 2026
- Deployment modes
- PoWA offers local mode for a single instance and remote mode that collects metrics from multiple instances into a repository server.powa.readthedocs.io · read 7 Oct 2026
- Index analysis
- PoWA supports HypoPG, which lets users test hypothetical indexes without creating real indexes.powa.readthedocs.io · read 7 Oct 2026
- Notable query limit
- The UI only displays queries observed in at least two distinct snapshots, which takes at least 10 minutes with the default snapshot frequency.powa.readthedocs.io · read 7 Oct 2026
- Performance impact
- PoWA can add performance overhead and disk usage; the documentation says local mode can have more overhead and remote mode should run few queries against target databases.powa.readthedocs.io · read 7 Oct 2026
- PostgreSQL requirement
- The current version is designed for PostgreSQL 9.4 and newer, and pg_stat_statements is mandatory.powa.readthedocs.io · read 7 Oct 2026
- Purpose
- PoWA collects and aggregates performance metrics from PostgreSQL instances and presents them in charts to help monitor and tune servers.powa.readthedocs.io · read 7 Oct 2026
- Remote monitoring
- Remote mode can collect metrics from multiple instances, including read-only standby servers, without requiring a PostgreSQL restart to add a monitored instance.powa.readthedocs.io · read 7 Oct 2026
- Security
- The documentation says the UI uses prepared statements and recommends HTTPS, SSL for UI-to-PostgreSQL connections, and restricting Internet access to PoWA and PostgreSQL.powa.readthedocs.io · read 7 Oct 2026
- Security limitation
- In remote mode, the documentation warns that saved remote-server passwords are stored as plain text and recommends using other libpq authentication methods.powa.readthedocs.io · read 7 Oct 2026
- Support
- The documentation directs users to community IRC and GitHub issue trackers for component-specific support.powa.readthedocs.io · read 7 Oct 2026
- Supported metrics
- Supported statistics extensions include pg_stat_statements, pg_qualstats, pg_stat_kcache, pg_wait_sampling, and pg_track_settings.powa.readthedocs.io · read 7 Oct 2026
- Version 5 features
- PoWA 5 adds datasource views for replication, background writer, checkpointer, SLRU, WAL, and PostgreSQL 16 or newer I/O statistics, along with per-database metric snapshots.postgresql.org · read 7 Oct 2026
