Today MySQL module collects many relevant metrics, however some are missing. E.g.

• innodb rows {deleted, updated, read, inserted}
• slow queries
• row locks
• CPU time spent by MySQL process
• cache stats (SHOW STATUS LIKE "qcache%"), including cache size.
• buffer pool size (innodb_buffer_pool_size)
• connection errors (SHOW GLOBAL STATUS LIKE 'Connection_errors%';)
• database keyword to use for filtering