Bug 1945255

Summary:	[RFE] [5.x] Ceph to implement a WARNING for when processes enter swap
Product:	[Red Hat Storage] Red Hat Ceph Storage	Reporter:	Mike Hackett <mhackett>
Component:	RADOS	Assignee:	Neha Ojha <nojha>
Status:	CLOSED WONTFIX	QA Contact:	Pawan <pdhiran>
Severity:	medium	Docs Contact:
Priority:	unspecified
Version:	5.0	CC:	akupczyk, bhubbard, ceph-eng-bugs, nojha, pdhiran, rzarzyns, sseshasa, vereddy, vumrao
Target Milestone:	---	Keywords:	FutureFeature
Target Release:	7.0
Hardware:	Unspecified
OS:	Unspecified
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Clone Of:		Environment:
Last Closed:	2023-07-07 17:44:53 UTC	Type:	Bug
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
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Embargoed:

Description Mike Hackett 2021-03-31 14:34:36 UTC

Description of problem:
The Ceph cluster should report a Warning status when the kernel causes excessive swapping due to page cache use. This could be due to customer setting an unusally high osd_memory_target with blue_fs_buffered_io = true for example. The Ceph status should report this as a warning for the customer. This is a supportability/usability enhancement request.

With the plan to default to bluefs_buffered_io = true in 5.0 this warning in the status would be vital.

Comment 1 Mike Hackett 2021-03-31 14:35:22 UTC

For some referance: https://access.redhat.com/solutions/4967421