Bug 237453

Summary:	Xenstored slowing system down even with paused domains
Product:	[Fedora] Fedora	Reporter:	Adam Huffman <bloch>
Component:	xen	Assignee:	Daniel Berrangé <berrange>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	6	CC:	bstein, katzj, xen-maint
Target Milestone:	---
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2008-02-27 00:06:16 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Adam Huffman 2007-04-23 10:28:39 UTC

Description of problem:

This morning I have found my machine to be very slow and it seems xenstored is
the culprit.  I have two active domUs so I paused them via virt-manager to see
if that would alleviate the problem but it doesn't seem to have made much
difference.  System load is currently 4 and all disk I/O operations are very slow.

Version-Release number of selected component (if applicable):
xen-3.0.3-8.fc6.x86_64

How reproducible:


Steps to Reproduce:
1.
2.
3.
  
Actual results:


Expected results:


Additional info:

The Linux domU is using LVM partitions, the other one is using file-backed
storage in /var/lib/xen/images

Comment 1 Daniel Berrangé 2007-04-23 12:03:09 UTC

Known problem reported upstream:

http://lists.xensource.com/archives/html/xen-devel/2006-10/msg00487.html

Not aware of any current work to re-writing XenStored to not suck yet :-(

Comment 2 Daniel Berrangé 2007-04-25 19:44:45 UTC

The performance problems are even worse  in Xen 3.0.5   

http://lists.xensource.com/archives/html/xen-devel/2007-04/msg00663.html 

I am experimenting with ways to address it....

Comment 3 Chris Lalancette 2008-02-27 00:06:16 UTC

This report targets FC6, which is now end-of-life.

Please re-test against Fedora 7 or later, and if the issue persists, open a new bug.

Thanks