Metrics
Immich supports Prometheus based metrics. You can read more about them over at the official Immich documentation. You can configure the metrics via two configuration keys. metrics-telemetry-include and metrics-telemetry-exclude. They map to the environment variables IMMICH_TELEMETRY_INCLUDE and IMMICH_TELEMETRY_EXCLUDE documented here.
Examples
Enable all, except api metrics
sudo snap set immich-distribution metrics-telemetry-include="all"
sudo snap set immich-distribution metrics-telemetry-exclude="api"
Mix and match as you see please, available options are host, api, io, repo, job.