Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!uwm.edu!psuvax1!psuvm!SLACVM!BOEHEIM From: BOEHEIM@SLACVM.BITNET (Chuck Boeheim) Newsgroups: bit.listserv.vmxa-l Subject: Looking a way to limit interactive CPU utilization Message-ID: Date: 7 Feb 90 17:40:04 GMT Sender: VM/XA Discussion List Reply-To: VM/XA Discussion List Lines: 23 Approved: NETNEWS@PSUVM Gateway Comments: To: MONTANAN@EVALUN11.BITNET REPLY TO 02/06/90 18:30 FROM MONTANAN@EVALUN11.BITNET "Rogelio Montanyana": Looking a way to limit interactive CPU utilization We have such a system in place at SLAC. It's more than a single exec, and not at all documented, but you can probably understand it from reading the execs in fairly short order. It uses monitor data from RTM/SMART, and so would only be of use to you if you have that product. The execs find out from SMART which users have exceeded a threshold of CPU use averaged over an interval. We use 10% over 10 minutes with fairly good results. This tends to allow people to have quick spikes of activity without penalty and only get the ones that crunch for a while. Under HPO it changes the user's priority from our standard of 50 to 99. Under XA it sets their relative SHARE from 100 to 5. If they're good in the next interval, it sets it back. It also has an exclusion list, a notification list, and logging. If you would like this, AS IS, send me mail at BOEHEIM at SLACVM. -Chuck Boeheim