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Bug 1237286 - virt-who-0.11-5.el7.noarch has 100% CPU usage when querying environment.
Summary: virt-who-0.11-5.el7.noarch has 100% CPU usage when querying environment.
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: virt-who
Version: 7.1
Hardware: Unspecified
OS: Unspecified
urgent
urgent
Target Milestone: rc
: ---
Assignee: Radek Novacek
QA Contact: xingge
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2015-06-30 17:48 UTC by William
Modified: 2023-09-14 03:01 UTC (History)
9 users (show)

Fixed In Version: virt-who-0.14-1.el7
Doc Type: Bug Fix
Doc Text:
Previously, virt-who queries in some situations consumed significantly more CPU resources than expected. This update addresses the bug, and virt-who queries are now more consistently efficient in CPU usage.
Clone Of:
Environment:
Last Closed: 2015-11-19 11:56:24 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2015:2370 0 normal SHIPPED_LIVE virt-who bug fix and enhancement update 2015-11-19 10:39:27 UTC

Description William 2015-06-30 17:48:40 UTC 
Description of problem:

On RHEL 7.1 install virt-who is consuming 100% CPU when making queries.


Version-Release number of selected component (if applicable):
RHEL 7.1
virt-who-0.11-5.el7.noarch  

How reproducible:
Persistent in the customer environment

Steps to Reproduce:
1.Install RHEL 7 on 1+ CPU system
2. configure virt-who
3. report on 100+ hypervisor /1500+ VM environment

Actual results:
100% CPU usage until virt-who completes

Expected results:
Does not consume 100% CPU resources

Additional info:

Tested virt-who-0.14-1.el7.noarch.rpm in the customer environment.  This dropepd query time to 3.5 min and CPU usage to ~35%
Comment 2 Radek Novacek 2015-07-02 06:33:03 UTC 
Is the performance you've measured with virt-who-0.14-1.el7 sufficient or should we try to improve it further?

The rebased version will get to RHEL-7.2.
Comment 4 Radek Novacek 2015-07-14 07:11:25 UTC 
William, thanks for confirmation. It looks that new version of virt-who has sufficient performance.
Comment 6 Eko 2015-09-07 05:11:55 UTC 
we test the virt-who performance with virt-who-0.14-4.el7.noarch, no performance issue found.

10 hosts x 100 guests = 1000 guests 

The cpu and memory usage is acceptable.

Details, please refer to: https://mojo.redhat.com/docs/DOC-1044700
Comment 8 Radek Novacek 2015-09-29 07:35:03 UTC 
Alan,

the change is not easy to backport into RHEL-7.1 virt-who package. The whole part touching VMWare hypervisor is rewritten and it requires changes all over the codebase.

I think it would be better to provide the same virt-who package that will be part of RHEL-7.2 to the customer now. This version is thoroughly tested by QE team.

Do you agree to provide latest virt-who package (virt-who-0.14-9.el7) to the customer as hotfix for this issue? I can rebuild it and tag it as hotfix if necessary.
Comment 10 Radek Novacek 2015-10-06 08:17:05 UTC 
Hotfix build done:

https://brewweb.devel.redhat.com/taskinfo?taskID=9923102

Let me know if you need anything else.
Comment 11 errata-xmlrpc 2015-11-19 11:56:24 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://rhn.redhat.com/errata/RHBA-2015-2370.html
Comment 12 Red Hat Bugzilla 2023-09-14 03:01:22 UTC 
The needinfo request[s] on this closed bug have been removed as they have been unresolved for 1000 days
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