[Yum-devel] yum 3.0.2

[seth vidal]

On Thu, 2007-01-04 at 18:31 +0100, Tim Lauridsen wrote:
> Terje Rosten wrote:
> > * seth vidal
> > | 
> > | If no one sees anything brazen and stupid by friday I'll put out a 3.0.3
> > | to fix this up.
> >
> > I might found one more bug, I did some profiling (howto coming soon)
> > to discover the issue.
> >
> > It's a performance issue, yum 3.0.2 is spending lots of time (70%) in
> > the returnObsoletes function.
> >
> > To understand the problem have a look at these callgraphs:
> >
> >  http://web.phys.ntnu.no/~terjeros/yum/yum-3.0.2-callgraph.png
> >
> >  http://web.phys.ntnu.no/~terjeros/yum/yum-3.0.1-callgraph.png
> >
> > generated by a simple 'yum install xpdf'. 
> >
> > The kcachegrind files is available here:
> >
> >   http://web.phys.ntnu.no/~terjeros/yum/
> >
> >
> >  - Terje
> > _______________________________________________
> > Yum-devel mailing list
> > Yum-devel at linux.duke.edu
> > https://lists.dulug.duke.edu/mailman/listinfo/yum-devel
> >   
> I  am seeing the same thing in yumex after upgrading yum to 3.0.2, it 
> added about 1 min to the package list creation.
> 
> I add some extra debug output to yumex and found out that it was 
> doUpdateSetup there is the problem.
> 
> output from yumex:
> 
> yum 3.0.1
> 16:02:59 : Building Package Lists : doRpmDBSetup
> 16:03:00 : Building Package Lists : doTsSetup
> 16:03:00 : Building Package Lists : doUpdateSetup
> 16:03:02 : Building Package Lists : Updates
> 16:03:03 : Building Package Lists : 27 Updates found
> 
> yum 3.0.2
> 16:05:56 : Building Package Lists : Start
> 16:05:56 : Building Package Lists : doRpmDBSetup
> 16:05:56 : Building Package Lists : doTsSetup
> 16:05:56 : Building Package Lists : doUpdateSetup
> 16:06:58 : Building Package Lists : Updates
> 16:06:59 : Building Package Lists : 27 Updates found
> 16:06:59 : Building Package Lists completed
> 

I was looking through the patches applied to 3.0.2 and I think I have an
idea where this is happening. Let me do some more testing and I'll
respond back.

-sv