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- Path: sparky!uunet!olivea!sgigate!odin!fido!zola!zuni!anchor!olson
- From: olson@anchor.esd.sgi.com (Dave Olson)
- Newsgroups: comp.sys.sgi
- Subject: Re: IRIX 4.0: how much memory?
- Message-ID: <os2mdk4@zuni.esd.sgi.com>
- Date: 21 Aug 92 20:16:26 GMT
- References: <1992Aug21.094913.42477@kuhub.cc.ukans.edu>
- Sender: news@zuni.esd.sgi.com (Net News)
- Organization: Silicon Graphics, Inc. Mountain View, CA
- Lines: 39
-
- In <1992Aug21.094913.42477@kuhub.cc.ukans.edu> arritt@kuhub.cc.ukans.edu writes:
-
- | We're considering an upgrade from IRIX 3.3 to 4.0, now that
- | the rest of you have served as the guinea pigs :-) :-)
- | ... Anyway, the problem is we've been told 4.0 needs 'more memory'
- | but not how much 'more'. So a couple of questions arise:
- |
- | (1) With 16 MB will our 4D/25 only have problems at the margin,
- | for heavy loads or the largest applications; or will the thing
- | turn into an electronic doorstop?
-
- 16 Mbytes is the minimum useful system with 4.0.1, unless you use
- the thing as just a terminal. My opinion, which somewhat conflicts
- with official statements ;) For any 'real' use, 16 isn't enough
- (I've had this opinion reinforced by using an r4k indigo with only
- 16 Mb for development the last few weeks; you do way to much paging,
- which sort of wastes the faster cpu). I'd go with 24 minimum for
- systems with significant workloads, and if you have heavy workloads
- (of any size, as opposed to small number crunchers (if there are such
- things ;)) I'd go for at least 32. Memory is too cheap (even from SGI
- these days), to skimp. You can blame it on bloat or whatever, but
- those are the facts as I see them.
-
- | (2) All of the simm slots are filled with 1 MB simms. If more memory
- | is essential our ideal strategy would be to replace one bank of simms
- | with 4 MB, for a total of (4*4 + 12*1) = 28 MB of memory. But we've
- | gotten a gazillion different answers about whether 4 MB and 1 MB
- | simms can co-exist in the same machine. We'd very much like to hear
- | from anyone out there who actually **HAS** 4 MB and 1 MB simms in
- | their machine, or who tried it and found it didn't work. We've gotten
- | lots of answers along the lines of 'I don't think it will work' or
- | 'It ought to work ok', but no real case histories.
-
- The 'official' answer is to go to double high (2 Mbyte) SIMMs. I hear
- conflicting stories on 1 and 4 mixtures also.
- --
- Let no one tell me that silence gives consent, | Dave Olson
- because whoever is silent dissents. | Silicon Graphics, Inc.
- Maria Isabel Barreno | olson@sgi.com
-