[NTLUG:Discuss] unusual diskspace use

[m m]

All:
Can any one help me to find out why the /dev/ida/c0d0p3 use the diskspace to 
90%?
I only install basic web, database server (and X) on this box. It shouldn't 
take more than 2G~3G.
it seems the extra 4G are used that are not necessary. (I save all my data 
files on /files)
Where do I check it? mailq? log files? or what?
Thanks

Filesystem          1K-blocks       Used   Available  Use% Mounted on
/dev/ida/c0d0p3 8393280  7146244    820676   90%  /
/dev/ida/c0d0p1    98747        9253     84395   10%  /boot
none                    62472             0     62472    0%   /dev/shm
/dev/hde1      288435168  7009736 266773752  3%  /files

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