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- Path: sparky!uunet!gatech!darwin.sura.net!dtix!condor.navsses.navy.mil!system
- From: system@condor.navsses.navy.mil
- Newsgroups: comp.os.vms
- Subject: re: How do I use more memory?
- Message-ID: <1992Dec29.135713.357@condor.navsses.navy.mil>
- Date: 29 Dec 92 18:57:13 GMT
- References: <9212282032.AA07085@uu3.psi.com>
- Organization: NSWCCD, Naval Ship Systems Eng Sta, Phila PA
- Lines: 42
-
- In article <9212282032.AA07085@uu3.psi.com>, leichter@lrw.com (Jerry Leichter) writes:
- >
- > I've recently acquired a VAXstation with 80 Mbytes of physical memory,
- > and I would like to use the memory almost exclusively to run really
- > big (large arrays) scientific computational code. I'm more than
- > willing to sacrifice other management concerns.
- >
- > and boosted up my user authorizations to:
- >
- > WSdef: 150
- > WSquo: 163840
- > WSextent: 163840
- >
- > This will work, but I would recomment making WSQUOTA smaller - perhaps 40000
- > or so at most. When the system has plenty of free memory (as it should for
- > what you are trying to do to make any sense) WSQUOTA will be pretty much
- > irrelevant, as a process that needs memory will be limited by WSEXTENT. But
- > there are going to be times when you want to run a couple of big, but not
- > really huge processes, and it's nice to have the WSQUOTA control in effect.
- >
-
- Why would you want to force every image you run to have to work very hard to
- get a decent working set size each time you run it. When you activate an image
- the system sets your working set limit to the size specified by the WSdef value
- in your uaf record. The system will then increase your working set limit by
- WSINC if your fault rate is above PFRATH over the period specified by AWSTIME.
- What I have set up for most of the users on my 6000's (Each has 256MB) is
- something like this:
-
- WSDef: 8192
- WSQuo: 8192
- WSExt: 16384
-
- This way a proccess' working set limit will start high and therefore it will
- not have to fight the system for increases to its working set limit.
- --
- Mike Jacobi
- NAVSSES VAXCluster system manager
- System@Eagle.Navsses.Navy.Mil
- System@Condor.Navsses.Navy.Mil
-
- Disclaimer - I speak for myself. No-one else.
-