Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!usc!zaphod.mps.ohio-state.edu!uwm.edu!psuvax1!rutgers!cbmvax!grr
From: grr@cbmvax.commodore.com (George Robbins)
Newsgroups: comp.unix.ultrix
Subject: Re: Tuning up an Ultrix system? HELP
Message-ID: <9700@cbmvax.commodore.com>
Date: 16 Feb 90 14:12:27 GMT
References: <5383@okstate.UUCP>
Reply-To: grr@cbmvax.cbm.commodore.com (George Robbins)
Organization: Commodore, West Chester, PA
Lines: 31

In article <5383@okstate.UUCP> klarich@okstate.UUCP (Terry Klarich) writes:
> 
> I have been asked to improve the proformance of our Ultrix machine.  It is
> a 8350 running Ultrix 3.1.  How would one use the information given by vmstat
> and iostat to decide what kernell parameters to change to get the best
> proformance given our situation.  If anyone can help with this problem, I
> would like to hear from you.

In almost all respects tuning an Ultrix system and interpreting the output
of these programs is the same as any other BSD derived operating system.
You might find asking over in comp.unix.wizards more profitable.

Generalities:

uptime:		elevated load index		buy more cpu

vmstat -s:	lots of page out / swap out	buy more core

iostat:		uneven loading			rearrange partitions

Generally, books won't get you too far when it comes to tuning, it's more a
matter of looking and learning on your own system (the game being different
between trying to improve response of a moderatly loaded system and trying
to keep a mega-loaded student timeshareing machine from expiring).  I would
expect that there would have been a number of papers / sessions at Usenix
over the years, but don't have any references...

-- 
George Robbins - now working for,     uucp:   {uunet|pyramid|rutgers}!cbmvax!grr
but no way officially representing:   domain: grr@cbmvax.commodore.com
Commodore, Engineering Department     phone:  215-431-9349 (only by moonlite)