The Mac OS X Server Update 10.3.3 significantly reduces the number of files that will be written to this directory, though you may still wish to periodically clean it out. Any time you want to empty the folder, follow these steps:
- Stop the Print Service.
- Open Terminal (/Applications/Utilities).
- Execute these commands:
$ sudo rm -r /var/spool/cups/tmp
$ sudo mkdir /var/spool/cups/tmp
$ sudo chmod 1770 /var/spool/cups/tmp
- Start the Print Service.