This bug was initially created as a copy of Bug #2256560 I am copying this bug because: Description of problem: mds_cache_mem_rss perf counter can be a useful metric to detect the usage of mds cache and detect mds cache oversize before it happens. Requesting to change the priority of the mds_rss metric from Debug to useful Version-Release number of selected component (if applicable): NA How reproducible: NA Steps to Reproduce: 1. 2. 3. Actual results: NA Expected results: NA Additional info:
The below workaround has been given by development team for the same: 1. Bring down the rook-ceph-operator. 2. Edit Ceph exporter deployment yaml. 3. Reduce Prio Limit from 5 to 0. 4. Ceph exporter pods will be restarted with the updated values and the metrics will be generated. The above work around is not recommended in customer environments as it needs to bring down the rook-ceph-operator. So far, we have used the above workaround to test the alert feature in the happy path, but not a recommended one for further testing. Mainly the negative scenarios and resiliency testing will have an impact due to this.
Hi Santhosh/Mudit, Tracker BZ-2256731 fixed in "ceph-17.2.6-193.el9cp" We verified with ceph version ceph-17.2.6-194.el9cp. Prio Limit in Ceph exporter deployment yaml is still '5' and it should be '0'. Please refer attached screenshots for reference. Please let us know it is fixed in the same build or different.
(In reply to Nagendra Reddy from comment #5) > Hi Santhosh/Mudit, > > Tracker BZ-2256731 fixed in "ceph-17.2.6-193.el9cp" > > We verified with ceph version ceph-17.2.6-194.el9cp. Prio Limit in Ceph > exporter deployment yaml is still '5' and it should be '0'. This is not the expectation here. Prio limit in Roo ceph exporter deployment will remain the same, that is, 5. The change was done in ceph side to increase the priority limit of ceph_mds_mem_rss metric so that it can be emitted even with Priority limit 5. So it should be tested that `ceph_mds_mem_rss` metric is visible even with Prio-limit 5. > > Please refer attached screenshots for reference. > > Please let us know it is fixed in the same build or different.
Verified with below kit. Bug is fixed. I can see the ceph_mds_mem_rss metrics in dashboard with Priority limit 5. Please find the attached screenshot for reference. ODF 4.15.0-126.stable 4.15.0-0.nightly-2024-01-25-051548
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory (Important: Red Hat OpenShift Data Foundation 4.15.0 security, enhancement, & bug fix update), and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHSA-2024:1383