Metrics

Coolify displays CPU and memory history collected by Sentinel. Server charts show total CPU and memory usage, while resource charts show the usage of an individual application or standalone database container.

The short version

Enable metrics on an eligible server to collect CPU and memory samples through Sentinel. Sampling and retention are configured per server, and charts show only the history still stored on that server.

Resource metrics have limitations

Resource metrics are not available for Docker Compose applications or one-click service deployments. The resource container must also be running before Coolify can display its metrics.

What metrics are available

Server CPUShows the percentage of total server CPU currently in use over the selected period.

Server memoryShows the percentage of total server memory currently in use over the selected period.

Application containersShows CPU percentage and memory usage in MB for a running, non-Compose application container.

Standalone databasesShows CPU percentage and memory usage in MB for a running standalone database container.

Before you enable metrics

Use a validated, non-Swarm server that is not configured as a build server.
Enable and sync Sentinel on that server.
Allow enough disk space on the connected server for the sampling rate and retention period you configure.

Enable metrics

Metrics are enabled at the server level and use the Sentinel container already assigned to that server.

Select the server

Open Servers and select the eligible connected server.

Open the Charts page

Open Charts and select Enable Metrics.

Wait for Sentinel to restart

Coolify saves the setting and restarts Sentinel with the metrics collector enabled. The collector then begins storing server samples and samples for supported running resources.

Confirm that metrics are available

Wait for the CPU Usage and Memory Usage charts to begin showing data.

If Sentinel is disabled, the Metrics page directs you to enable it first. Enabling metrics starts Sentinel when the server is eligible.

View metrics

Server and resource charts use different memory units.

Server metrics

Open Servers > [server] > Charts.

CPU Usage is the percentage of total server CPU in use.
Memory Usage is the percentage of total server memory in use.

The Metrics page offers these time ranges:

5 minutes and 10 minutes, with live refresh
30 minutes
1 hour
12 hours
1 week
30 days

The live ranges ask Coolify for new chart data every five seconds. The Sentinel sampling rate determines how often a new metric point is available.

Sampling and retention

Open Servers > [server] > Charts to change these values:

Collection rate controls the collection interval. The default is 10, and the minimum is 1.
History retention controls local retention. The default is 7, and the minimum is 1.
Push interval controls health-report frequency. The default is 60 seconds, and the minimum is 10.

Save the settings to apply them. Chart tooltips show both your local time and UTC.

Sentinel stores this history under /data/coolify/sentinel on the connected server. A lower collection interval creates more points and uses more disk space.

The chart can offer a longer range than the retained data. For example, a 30-day chart shows only the available history when History retention remains at its seven-day default.

Disable metrics

Open the server Charts page and select Disable Metrics. Coolify restarts Sentinel with the collector disabled.

Disabling metrics does not disable Sentinel itself. Server heartbeats, container state, health information, and disk usage reporting can continue without CPU and memory history.