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- Path: sparky!uunet!munnari.oz.au!manuel.anu.edu.au!durras!ivan
- From: ivan@durras.anu.edu.au (Ivan Angus - ne Dean)
- Newsgroups: comp.sys.sun.admin
- Subject: Four processor vs two processor Galaxy systems
- Date: 9 Nov 92 05:20:41 GMT
- Organization: Australian National University
- Lines: 39
- Message-ID: <ivan.721286441@durras>
- NNTP-Posting-Host: 150.203.22.8
- Summary: When does a four processor system run slower than a two processor one ?
- Keywords: performance, upgrade, galaxy
-
- Has anyone managed to produce a summary of what sort of applications
- cause a four processor system, e.g. 4/690 to run slower than a two
- processor version of the same system ?
-
- There seem to have been numerous reports of such occurrences. We are
- thinking of upgrading a 4/670 from a two processor to a four processor
- system. We are concerned that such an upgrade may actually degrade the
- performance. The sort of job mix we would subject it to includes
- running up to sixty Xterminals and a number of telnet style logins, with most
- users running compilations, plus a small amount of database work. The
- users are primarily first year University students, so the compilations
- tend to be small but frequent.
-
- Along the same lines, is upgrading to 4.1.3 a good idea ? Presumably
- perfomance patches for Galaxy systems have been rolled into 4.1.3 ?
-
- The 4/670 can happily run 4.1.2, and it isn't always obvious whether
- a minor release is worth chasing. Does anyone have any opinions on this ?
- In particular, is the multiprocessor support significantly enhanced in
- 4.1.3 ? What about security patches ? I notice that a recent post
- (<1992Nov4.150824.26312@src.honeywell.com>) lists a number of important
- patches which haven't been included in 4.1.3. Has this minor upgrade
- been designed solely to suport their new hardware ?
-
- (Yes, having the release manual would help, but unfortunately no-one here
- has received one yet to my knowledge. Requests to RTFM will be stored
- until we actually get a FM).
-
- Please email me, and I'll summarise.
-
- -------------------------------------------------------------------
- Ivan Angus - ne Dean Here : x3261
- Faculties Computer Unit There : (06) 249 3261
- Australian National University Everywhere : +61 6 249 3261
- --
- -------------------------------------------------------------------
- Ivan Angus - ne Dean Here : x3261
- Faculties Computer Unit There : (06) 249 3261
- Australian National University Everywhere : +61 6 249 3261
-