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Bug 1636253

Summary:	mon: High MON cpu usage when cluster is changing
Product:	[Red Hat Storage] Red Hat Ceph Storage	Reporter:	Neha Ojha <nojha>
Component:	RADOS	Assignee:	Neha Ojha <nojha>
Status:	CLOSED ERRATA	QA Contact:	Parikshith <pbyregow>
Severity:	high	Docs Contact:
Priority:	high
Version:	3.1	CC:	ceph-eng-bugs, ceph-qe-bugs, dzafman, kchai, nojha, pbyregow, rperiyas, tchandra
Target Milestone:	z1
Target Release:	3.1
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	RHEL: ceph-12.2.5-55.el7cp Ubuntu: ceph_12.2.5-40redhat1	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2018-11-09 01:00:57 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Neha Ojha 2018-10-04 20:44:10 UTC

Description of problem:

After upgrading to Luminous 12.2.4 (from Jewel 10.2.5), consistently high cpu usage was seen when OSDMap changed, especially from DOWN to UP.



Additional info:

Related tracker issue: 

http://tracker.ceph.com/issues/23912
http://tracker.ceph.com/issues/25100

Comment 7 Neha Ojha 2018-10-08 20:44:44 UTC

Hi Parikshith,

These steps look fine to me. 

I would suggest you to monitor the CPU utilization and report it back in this bz. FWIW, it should not be exceedingly high(300%) as was seen in the bug report.

Thanks,
Neha

Comment 11 errata-xmlrpc 2018-11-09 01:00:57 UTC

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, 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/RHBA-2018:3530