Re: Things to do this week instead of arguing about mixers

[Eric Sandeen <sandeen redhat com>]

Michael Cronenworth wrote:
> -------- Original Message --------
> Subject: Re: Things to do this week instead of arguing about mixers
> From: Eric Sandeen <sandeen redhat com>
> To: Development discussions related to Fedora <fedora-devel-list 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 host ~]# filefrag /var/lib/rpm/Packages
>> /var/lib/rpm/Packages: 844 extents found, perfection would be 1 extent
>> [root 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?

-Eric