Michael Cronenworth wrote:
-------- Original Message --------
Subject: Re: Things to do this week instead of arguing about mixers
From: Eric Sandeen <sandeen@xxxxxxxxxx>
To: Development discussions related to Fedora
<fedora-devel-list@xxxxxxxxxx>
Date: 04/28/2009 10:36 AM
on my xfs root systems I still have hundreds of extents for this file.
Do you have xfs_fsr in a cron job?
-Eric
Here's a more accurate test. This is from another multi-year old system,
but this time xfs_fsr has never been run. It's currently on F9.
Originally F7 IIRC.
$ sudo filefrag /var/lib/rpm/Packages
/var/lib/rpm/Packages: 325 extents found
$ ll -h /var/lib/rpm/Packages
-rw-r--r-- 1 rpm rpm 37M 2009-04-13 00:21 /var/lib/rpm/Packages
$ df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
297G 79G 219G 27% /
The reason for this is quite obvious: RPM does first install the files of a
package to disk and then update the rpmdb. This is repeated for each package
to keep the rpmdb as close to the file system as possible. This means that
the rpmdb grows for each package installed while there are other files
written to disk in between.
Of course rebuilding the rpmdb fixes the fragmentation.
So, yes, rpmdb is a good candidate for further tweaking - possibly with pre
allocation (nevertheless tweaking the db4 settings is prior on my list).
So another question: Is there a way to free no longer needed preallocated
disk space again?
Florian
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