- spool print jobs
- buffer large selects, etc.
Normally theses files will be deleted automatically but when the client crashes theses files persist.
The only solution is to monitor the tmp directory and delete the files manually or by a script if necessary.
You may also try this:
Use System Administrator responsibility,
Navigate > Install > Printer Driver > Define
Under the 'Spool File', change 'Yes' to 'No'.
This prints the initial print to the out directory instead of printing it to the temp directory and invokes the utility to clean up the temp files.