HELP: How much diskspace in /tmp per user ?

Hello ! After getting my problem solved with the permissions of the Informix files, I finally could do the performance tests for the three systems we have. During that I found that the performance depends on the amount of free space on the root filesystem - no system did have a /tmp filesystem. Now, my questions are: 1. Where does Informix put, of course, silently its temporary files ? If it would not create the temporary files and delete them immediately after the open, I could find out myself :-) 2. If it is in /tmp (or wherever it is) how much disk space should be reserved for every user of the DB ? Is it useful to have a /tmp-filesystem in this case ? I think answer for question #2 will depend on the size of the data one query will deliver (more or less), but a first estimate would be nice. I would like to have a guideline how to configure the UNIX system for best Informix performance. A rule of thumb is very much appreciated. Thanks in advance for your help, Norbert. P.S. My environment: ISC 4.01, Informix 5.0 with SE. Online might be different completely, I guess. --- Norbert Bladt, ascom Autelca AG VOICE: +41 31 999 6552 Payphone Management Software FAX: +41 31 999 6544 Worbstrasse 201 UUCP: uunet!mcsun!hslrswi!aut!nbladt CH-3073 Guemligen, Switzerland EMAIL: nbladt@autelca.ascom.ch