Drive Critical: /dev/loop0 (/var/tmp) is 100% full

[wowrack]

Hello,

Our customer is getting this error message:
Drive Critical: /dev/loop0 (/var/tmp) is 100% full
What does this mean and how to solve it?
Thank you.

root@engine [~]# df -m
Filesystem 1M-blocks Used Available Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
459853 16081 420037 4% /
/dev/sda1 99 18 77 19% /boot
tmpfs 1009 0 1009 0% /dev/shm
/usr/tmpDSK 485 44 416 10% /tmp

root@engine [~]# mount
/dev/mapper/VolGroup00-LogVol00 on / type ext3 (rw,usrquota)
proc on /proc type proc (rw)
sysfs on /sys type sysfs (rw)
devpts on /dev/pts type devpts (rw,gid=5,mode=620)
/dev/sda1 on /boot type ext3 (rw)
tmpfs on /dev/shm type tmpfs (rw)
none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw)
/usr/tmpDSK on /tmp type ext3 (rw,noexec,nosuid,loop=/dev/loop0)
/tmp on /var/tmp type none (rw,noexec,nosuid,bind)
sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw)

[madaboutlinux]

This looks like a false alarm. /tmp is just 10% used so it's ok to ignore the email.

OR

It may be possible that /tmp got full and you received an email and the temporary files got cleared off before you could look into it.

[wowrack]

Thanks.
If they receive the email too frequently, is there an official way from CPanel to increase the size?