Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.2 9/5/84; site yetti.UUCP Path: utzoo!utcs!mnetor!yetti!oz From: oz@yetti.UUCP (Ozan Yigit) Newsgroups: net.unix Subject: Re: Unix on the Vax 8600 Message-ID: <205@yetti.UUCP> Date: Thu, 4-Jul-85 14:54:19 EDT Article-I.D.: yetti.205 Posted: Thu Jul 4 14:54:19 1985 Date-Received: Thu, 4-Jul-85 18:41:49 EDT References: <1513@emory.UUCP> <7500004@pbear.UUCP> Reply-To: oz@yetti.UUCP (Ozan Yigit) Organization: York University Computer Science Lines: 31 Keywords: 8600, performance Summary: In article <7500004@pbear.UUCP> peterb@pbear.UUCP writes: > > > Since the 8600 still uses the same I/O structure as the 780's, heavy >swap will slow a 8600 down. > The only reason that an 8600 will slow down is because the 8600 is the only VAX that can push say an RA81 to its performance limit. > Piling on more users to an 8600 will slow I/O somewhat since the >unibus is still there, but cpu intensive processes will excell on the 8600. > Even an 8600 does not use up the entire unibus bandwidth. We found that our 8600 was on its knees (running VMS) because of a job with extremely high paging rate. It actually was due to an RA81 (there was only one disk at that time) becoming a bottleneck, NOT the unibus. Oz -- Oz [all wizardesque side effects are totaly unintentional, unless stated otherwise..] Usenet: [decvax | allegra | linus | ihnp4] !utzoo!yetti!oz Bitnet: oz@ [yuleo | yuyetti] ------------- Support GNU. Consider the 3-muskateers' motto: ONE FOR ALL - ALL FOR ONE