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PoWA

powa.readthedocs.io

Free plan WebLinuxSelf-hosted
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Spec score 7.6 #19 of 38 in Database Monitoring

What it is

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.

Spec sheet

Purpose
PoWA collects and aggregates performance metrics from PostgreSQL instances and presents them in charts to help monitor and tune servers.Read 7 Oct 2026 · powa.readthedocs.io
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.Read 7 Oct 2026 · powa.readthedocs.io
Support
The documentation directs users to community IRC and GitHub issue trackers for component-specific support.Read 7 Oct 2026 · powa.readthedocs.io
Configuration flexibility
Metrics can be selected and enabled or disabled, and users can add custom statistics extensions without modifying PoWA.Read 7 Oct 2026 · powa.readthedocs.io
Core components
The project includes the powa-archivist PostgreSQL extension, the powa-web interface, and an optional powa-collector daemon for remote mode.Read 7 Oct 2026 · powa.readthedocs.io
Deployment modes
PoWA offers local mode for a single instance and remote mode that collects metrics from multiple instances into a repository server.Read 7 Oct 2026 · powa.readthedocs.io
Index analysis
PoWA supports HypoPG, which lets users test hypothetical indexes without creating real indexes.Read 7 Oct 2026 · powa.readthedocs.io
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.Read 7 Oct 2026 · powa.readthedocs.io
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.Read 7 Oct 2026 · powa.readthedocs.io
PostgreSQL requirement
The current version is designed for PostgreSQL 9.4 and newer, and pg_stat_statements is mandatory.Read 7 Oct 2026 · powa.readthedocs.io
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.Read 7 Oct 2026 · powa.readthedocs.io
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.Read 7 Oct 2026 · powa.readthedocs.io
Supported metrics
Supported statistics extensions include pg_stat_statements, pg_qualstats, pg_stat_kcache, pg_wait_sampling, and pg_track_settings.Read 7 Oct 2026 · powa.readthedocs.io
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.Read 7 Oct 2026 · postgresql.org

Plans and prices

PoWA Free Open project; requires PostgreSQL and pg_stat_statements Read 7 Oct 2026 · powa.readthedocs.io

Every PoWA plan and price →

Strong points and limits

Strong points

  • Local and multi-instance remote monitoring modes
  • Supports read-only standby monitoring
  • HypoPG enables hypothetical index analysis
  • Selectable metrics and custom extensions
  • Free open project

Limits

  • Requires PostgreSQL and pg_stat_statements
  • Remote passwords may be stored in plain text
  • Monitoring can add overhead and disk usage
  • Queries appear only after two snapshots

Who it suits

PoWA suits PostgreSQL administrators who want self-hosted charts, query profiling, wait and lock analysis, and tuning data. It requires PostgreSQL and pg_stat_statements.

Verdict

PoWA offers flexible PostgreSQL monitoring with local or repository-based remote collection, extension support, and hypothetical-index analysis. Administrators should account for required components, monitoring overhead, and the documented remote-password limitation.

Where Specifiction places it

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