Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!watmath!clyde!cbatt!ucbvax!HI-MULTICS.ARPA!MHJohnson From: MHJohnson@HI-MULTICS.ARPA.UUCP Newsgroups: mod.computers.vax Subject: Re: Sizes of look-aside lists Message-ID: <870203045308.602434@HI-MULTICS.ARPA> Date: Mon, 2-Feb-87 23:53:00 EST Article-I.D.: HI-MULTI.870203045308.602434 Posted: Mon Feb 2 23:53:00 1987 Date-Received: Wed, 4-Feb-87 01:52:12 EST Sender: daemon@ucbvax.BERKELEY.EDU Organization: The ARPA Internet Lines: 25 Approved: info-vax@sri-kl.arpa I'll have to take back what I said about fragmentation, I reread the VMS Internals book and it does indicate the method described previously. Perhaps I am remembering something that used to be done in VMS a long time ago (long live VMS v1.5...). However, I still recommend getting the values for the (S I L)RP's as close to the peak usage as possible to minimize the thrashing that occurs when the system gets loaded. I also recommend buying more memory to reduce paging in addition to other fixes. I believe that 8 mbytes is not enough for a 780 (or 8200) class machine with any real load. We run quite comfortably w/ 16 mbytes on a 785 and uncomfortably w/ 8 mbytes on an 8200. I should find out soon how 32 mbytes is on an 8700 but I doubt it will be enough. There are plenty of good third party memory boards out there (even for the BI!) and I have yet to be dissappointed with any we have bought (Emulex, Clearpoint, & Trendata). They are worth every dollar. --Mark PS: when you go buy extra memory, be sure to increase several system parameters relating to your working set sizes, peak virtual pages, page file quotas (increase page & swap files too...) and the related user authorization values to get best use of the extra memory. By doing this you get the best results over a wide range of loads with the extra ememory.