Path: utzoo!utgpu!news-server.csri.toronto.edu!clyde.concordia.ca!uunet!cs.utexas.edu!know!zaphod.mps.ohio-state.edu!samsung!munnari.oz.au!muluru!lawley From: lawley@muluru.cs.mu.OZ.AU (michael lawley) Newsgroups: comp.sys.encore Subject: Umax 4.3 performance degradation Summary: Optimal system parameters Keywords: SLOW, Many users, Small load Message-ID: Date: 17 Aug 90 05:40:23 GMT Sender: news@cs.mu.oz.au Lines: 22 We are running a Multimax 320 with 64Meg of physical memory, 2 EMC's, 18 CPU's (APC's) and approx 600Meg of swap spread evenly across 5 disks. Recently, our student load has increased to about 80 students; a total of about 100 users at a time. (The machine is also doing some NFS serving and running Macintosh CAP software for about 50 Macs.) The problem we are experiencing is very poor response from the system. This seems to happen very suddenly, as if the system hits a brick wall. But the load on the machine is only around 5 i.e. we have 13 idle CPU's. These appear to be the symptoms of thrashing. Are there any (sysparam) parameters we should look at or system statistics we can examine to try and track them problem down. Any help would be much appreciated. mike -- _--_|\ michael lawley (lawley@cs.mu.OZ.AU). / \ The Unicycling Systems Programmer, \_.--.*/ Melbourne University, Computer Science v