On my machine, under the Start/Programs menu, under Accessories/SystemTools, exists System Monitor, which, if run, then offers under Edit/Add Item a category called Memory Manager, which then offers individual items including Swapfile in Use and Swapfile Size. Using this simple technique, as well as such tools as MSINFO32 (intuitively located under c:\program files\common files\microsoft shared\msinfo), and manually playing with swapfile max. and min sizes, I seem to have determined that my swapfile must never be more than 50% in use. I.e., if my swapfile is set at 60 Meg max., when the actual amount of swapped memory hits 30 Meg, I start getting out of memory messages.

> ---------- > From: John Whittington[SMTP:medisci@POWERNET.COM] > Sent: Wednesday, January 21, 1998 8:38 PM > To: SAS-L@UGA.CC.UGA.EDU > Subject: Re: Re[2]: SAS for OS/2? > > Further two my earlier comments about swapfile ('virtual memory') > management > in Win95, I've just been doing a little playing, with the following > 'discoveries': > > 1...The Win95 sawp file is always to some extent 'dynamic'. One can > set up > any values for minimum and maximum size of the swap file (within disk > space > limitations), but I haven't yet actually done any experiments to see > if it > actually does what it says it's doing - i.e. if the amount specified > as > 'maximum' actually becomes available to applications. > > 2...If one chooses the ('recommended') option to leave Win95 in total > charge > of swapfile management, the ('greyed ou') figures it puts into the > boxes are > 0 for minimum and 'no limit' for maximum. If that means what it says, > this > might be promising. > > 3...Using that 'recommended' (dynamic) option, I observed reported > 'swapfile > size' and 'swapfile usage' via the System Info section in MS Word. > With > Word as the only application open, the swapfile size is only about 1 > MB, and > the usage as 0%. As one opens further applications, that figure > rises, with > 'usage' still remaining very low. Typical increases on opening an > application seem to be about 2 MB for each MS application, and 8-9 MB > on > opening SAS. I have not yet been able to see the reported swapfile > size > changing as a result of those applications 'doing things'. > > It therefore looks as if each application is somehow telling Win95 > what sort > of swap file size it wants/needs when that application is opened (even > though little/none is actually being 'used' at that time) - but the > actual > swapfile sizes we are talking about are very modest. What remains for > me to > discover is whether an application can actually persuade Win95 to > increase > the allocated swapfile size after the application has been opened. I > somehow suspect that the problem may be that this is not possible - > and, if > so, will beg the question as to whether there is some way to change > the > amount of swapfile allocated to a particular application (e.g. SAS) on > opening. > > .. just a few thoughts for folk to ponder!! > > Kind Regards, > > John > > ---------------------------------------------------------------- > Dr John Whittington, Voice: +44 (0) 1296 730225 > Mediscience Services Fax: +44 (0) 1296 738893 > Twyford Manor, Twyford, E-mail: medisci@powernet.com > Buckingham MK18 4EL, UK mediscience@compuserve.com > ---------------------------------------------------------------- >