Learn how to remove the default user when running ClickHouse Server.

Learn how to query ClickHouse's `system.role_grants` to find users assigned to roles and roles assigned to specific users.

ClickHouse provides introspection tools like `system.stack_trace` for inspecting what code is currently running on each server thread, helping with debugging and performance monitoring.

Learn how to capture server logs at the client level, even with different log settings, using the `send_logs_level` client setting.