Bug 2215021

Summary:	[GSS][ODF 4.12] Failing to respond to cache pressure
Product:	[Red Hat Storage] Red Hat OpenShift Data Foundation	Reporter:	Rafrojas <rafrojas>
Component:	ceph	Assignee:	Kotresh HR <khiremat>
ceph sub component:	CephFS	QA Contact:	Elad <ebenahar>
Status:	NEW ---	Docs Contact:
Severity:	medium
Priority:	unspecified	CC:	bniver, khiremat, mparida, muagarwa, odf-bz-bot, sostapov, tnielsen, vshankar
Version:	4.12
Target Milestone:	---
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Hardware:	Unspecified
OS:	Unspecified
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
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Description Rafrojas 2023-06-14 13:33:47 UTC

Description of problem (please be detailed as possible and provide log
snippests):
After increasing the value of KCS 2 times the issue persists


Version of all relevant components (if applicable):
ODF operator 4.11.3 + Mode Internal

Does this issue impact your ability to continue to work with the product
(please explain in detail what is the user impact)?
Not at the moment the warning is constantly increasing

Is there any workaround available to the best of your knowledge?
No

Rate from 1 - 5 the complexity of the scenario you performed that caused this
bug (1 - very simple, 5 - very complex)?


Can this issue reproducible?
Constantly

Can this issue reproduce from the UI?


If this is a regression, please provide more details to justify this:


Steps to Reproduce:
1.
2.
3.


Actual results:


Expected results:


Additional info:

Comment 3 Malay Kumar parida 2023-06-14 17:09:07 UTC

Seems like some issue related to ceph configuration, Moving to rook for investigation.

Comment 4 Travis Nielsen 2023-06-14 21:18:01 UTC

Rook sets the mds_cache_memory_limit to 50% of the memory limit [1], which by default in ODF is set to 8Gi. 

Have you tried increasing the 'mds' memory limits specified in the StorageCluster CR to see if more memory will help resolve the warning? 

[1] https://github.com/rook/rook/blob/cd27f17ce8a9fd22000c961cee3e0a147707074f/pkg/operator/ceph/file/mds/config.go#L72-L74