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Monitor database hosts' disk performance
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Via the new ganglia::diskstat.
Disk performance is obviously important for database (isn't it?) and I remember Tim saying he missed a check he had added a while ago.

Version: unspecified
Severity: enhancement



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While there is no disk-specific alerts (other than RAID health checks, which probably should be enough) there is almost complete metrics gathered of io stats both on the MySQL grafana dashboards: (disk latency, throughput in bytes and iops) and on the host stats:

It is true that the host disk stats are not great (disk utilization is not very useful for real-world problems), but that is just a presentation issue that I am not pushing to improve.

Given the vagueness of the ticket, I would consider this as "Done" when prometheus monitoring was implemented.