filesystem full - freebsd 5.3

Oliver Fromme olli at
Mon Dec 19 06:00:49 PST 2005

Lukas Ertl <le at> wrote:
 > We have to cope with the same problem here.  It's a 662GB filesystem used 
 > for Cyrus imapd mail folders.  55GB free space, plenty of free inodes, and 
 > yet we get "filesystem full" messages.  If we remove some mail folders 
 > (postmaster double bounce stuff, thousands of mails per dir), the kernel 
 > stops complaining about a full filesystem (until it runs out of $factor_x 
 > again).

For an application like that (mail server), it might be
beneficial to create the file system with bsize == fsize
(e.g. both 8 kbyte), so you won't get any fragments at all.

On a related note, many people seem to set minfree to 0%,
in order to squeeze more space from the disk.  That's
almost always a mistake, because it increases fragmentation
considerably, especially if the file system has many small
write operations, and it reduces performance significantly.

Best regards

Oliver Fromme,  secnetix GmbH & Co. KG, Marktplatz 29, 85567 Grafing
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