Path: utzoo!mnetor!uunet!lll-winken!lll-tis!ames!pasteur!ucbvax!utorphys.BITNET!SYSRUTH
From: SYSRUTH@utorphys.BITNET
Newsgroups: comp.os.vms
Subject: RE: A question on PGFLQUOTA
Message-ID: <8804132115.AA00710@gpu.utcs.toronto.edu>
Date: 13 Apr 88 22:13:00 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 41


Well, to begin with there's no point in making PGFLQUOTA any bigger
than your biggest pagefile. So you will have to make pagefiles big
enough to handle it. In fact you'd better allow some extra if it's
very much bigger than the rest since VMS will use it preferentially
and (as far as I know) there's no way to dictate which pagefile to
use for which processes (if this *can* be done, I'd love to know how).
     
Second, you'll have to increase VIRTUALPAGECNT (sp?) to accommodate it.
     
Third, although it's not strictly necessary, if you have a decent
amount of memory on your system, you probably should increase WSMAX
(SYSGEN) and WSEXTENT (in AUTHORIZE) to something larger than they
are, unless they are already up in the 5000+ range.
     
I would consider 10,000 pretty restrictive. Our default here is around
20K, and several people have pgflquo of 30K. There is even a seismic
package running here which can be as big as 100,000 (although the largest
we've seen so far is about 80K). As a result, we have the following setup
(on our VAX 780, which has 32MB of memory):
     
biggest pagefile 150,000 blocks (because other processes get put there)
VIRTUALPAGECNT 150000
WSMAX 10240
WSEXTENT default 5000, can be as high as 7500 (5000 is ample for 99%
  of users' programs)
     
(Needless to say, with all that memory I have also drastically increased
all the memory management parameters (FREExxx, MPW_xxx, etc.), detached
processes' wsxxxx limits (in SYSGEN PQL_ parameters), paged and nonpaged
pool, request packet allocations, how many things are installed shared,
etc. etc. etc.)
     
Incidentally, we used to have an 8600 which was crippled with only 12MB,
and we still allowed default pgflquo of 20K, with no problems. Really it's
the quantity of pagefile space that counts here.
     
Hope this helps.
     
Ruth Milner
Systems Manager
University of Toronto Physics