[Yum-devel] yum 3.0.2

[Tim Lauridsen]

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
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>   
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

Tim