Bug 240018

Summary:	yum-priorities plugin makes yum unusable
Product:	[Fedora] Fedora	Reporter:	David Kovalsky <dkovalsk>
Component:	yum-utils	Assignee:	Seth Vidal <skvidal>
Status:	CLOSED ERRATA	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	rawhide	CC:	benl, christian.lupien, tim.lauridsen
Target Milestone:	---
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	3.2.4-2.fc7	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2007-09-04 22:12:14 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 David Kovalsky 2007-05-14 13:32:02 UTC

After installing yum-priorities plugin yum takes forever to resolve
dependencies. With the plugin disables `yum list updates' takes about 7 seconds
on my Lenovo T60 with Centrino Duo & 2 gigs of RAM. With the plugin enabled
resolving dependencies took almost 1 hour (!). top showed that yum eats the CPU
all of the time. 
And that was only 51 packages to update.

Comment 1 Christian Lupien 2007-09-03 23:00:38 UTC

I found the same problem (it exists also with yum-protectbase).

I did some profiling and I found the problem is with yum itself. It is in the
_getSacks function of __init__.py in /usr/lib/python2.5/site-packages/yum
This gets called for each package that needs to be erased and when there are a
lot (like when using the dries repo at a lower priority than core/update which
means more than a 1000 deletes) it is a large slowdown.

The function checks for the existence of self._pkgSack but I guess the checks is
done by calling the __len__ which extracts the list of packages. I fixed the
problem by replacing 
  if self._pkgSack and thisrepo is None:
with 
  if self._pkgSack != None  and thisrepo is None:
at the top of the  _getSacks function.

With this change, using yum-priorities with the dries repo is not slow anymore.

Comment 2 Seth Vidal 2007-09-03 23:20:08 UTC

What ver of yum are you using right now?

Comment 3 Christian Lupien 2007-09-04 00:56:19 UTC

I am using yum 3.2.2. 
rpm -q yum is 
 yum-3.2.2-1.fc7

Comment 4 Seth Vidal 2007-09-04 01:17:57 UTC

Please try out yum 3.2.4 from updates-testing - I think you'll find it's no
longer slow.

Comment 5 Christian Lupien 2007-09-04 01:57:41 UTC

Yes, that fixed it.

Comment 6 Fedora Update System 2007-09-04 22:12:09 UTC

yum-3.2.4-2.fc7 has been pushed to the Fedora 7 stable repository.  If problems still persist, please make note of it in this bug report.