How do you troubleshoot a Database Monitoring integration reporting no query metrics?

First confirm the database-level prerequisite: DBM relies on database introspection views and settings (for example, ensuring query text capture is enabled, like track_activity_query_size on PostgreSQL) - if these aren't enabled at the database level, the Agent has nothing to read regardless of its own configuration.

Check that the monitoring user configured for the integration actually has the required permissions - most engines need a role with monitoring-specific privileges (such as PostgreSQL's pg_monitor) rather than full administrative access; an under-privileged user will connect successfully for basic checks but silently fail to pull query-level data.

Verify the Agent's integration configuration explicitly has DBM collection enabled (it's typically a distinct flag from the base database check, not automatically on just because the base integration works) and that the config version matches what the installed database engine actually supports.

Confirm basic connectivity and authentication are actually fine by checking the base (non-DBM) database check status first - if the standard health/connection check is failing too, DBM's absence is a symptom of that broader connectivity problem, not a DBM-specific issue.

Finally, check the Agent's own logs and status output for the specific database check, since DBM-related collection errors (permission denied on a specific view, version incompatibility) are usually logged explicitly there rather than failing completely silently.

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