Is there more information on "performance reasons" [0]?
Elsewhere in the documentation [1] it even states:
> Monitoring of RBD images is disabled by default, as it can
significantly impact performance.
We want to use this in production to hopefully help with debugging a
rare nightly latency issue. Obviously, we don't want to introduce new
performance issues.
Does anyone have experience with enabling RBD per-image I/O statistics
[2] in production? Did it cause you any performance (or other) issues?
Mika
[0]
https://docs.ceph.com/en/latest/cephadm/services/monitoring/#setting-up-rbd-image-monitoring
[1]
https://docs.ceph.com/en/latest/mgr/dashboard/#enabling-rbd-image-monitoring
[2]
https://docs.ceph.com/en/latest/mgr/prometheus/#rbd-io-statistics
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