Things to do this week instead of arguing about mixers

drago01 drago01 at gmail.com
Wed Apr 29 11:13:29 UTC 2009


On Tue, Apr 28, 2009 at 5:36 PM, Eric Sandeen <sandeen at redhat.com> wrote:
> Michael Cronenworth wrote:
>> -------- Original Message --------
>> Subject: Re: Things to do this week instead of arguing about mixers
>> From: Eric Sandeen <sandeen at redhat.com>
>> To: Development discussions related to Fedora <fedora-devel-list at redhat.com>
>> Date: 04/28/2009 08:55 AM
>>
>>> Florian Festi wrote:
>>>> Eric Sandeen wrote:
>>>>>   - rpm? (file installation and/or db files?)
>>>> The rpmdb is a bunch of db4 files. In don't think I want to interfere with
>>>> the db4 engine...
>>> They're often badly fragmented, too :)  But whether or not that matters
>>> much for rpm performance, I dunno.
>>>
>>> [root at host ~]# filefrag /var/lib/rpm/Packages
>>> /var/lib/rpm/Packages: 844 extents found, perfection would be 1 extent
>>> [root at host ~]# ls -lh /var/lib/rpm/Packages
>>> -rw-r--r-- 1 rpm rpm 52M Apr 27 15:40 /var/lib/rpm/Packages
>>
>>
>> Somehow XFS is doing a much better job. This is from a four year old system:
>>
>> $ sudo filefrag /var/lib/rpm/Packages
>> /var/lib/rpm/Packages: 2 extents found
>> $ ls -lh /var/lib/rpm/Packages
>> -rw-r--r-- 1 rpm rpm 88M 2009-04-28 10:18 /var/lib/rpm/Packages
>
> on my xfs root systems I still have hundreds of extents for this file.
> Do you have xfs_fsr in a cron job?

well here (F10, ext4):

filefrag /var/lib/rpm/Packages
/var/lib/rpm/Packages: 8 extents found
du -hs /var/lib/rpm/Packages
52M	/var/lib/rpm/Packages

What did you do to get 800+ ?

(I did a db rebuild a while ago that might have changed / improved it)




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