Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!swrinde!zaphod.mps.ohio-state.edu!ub!uhura.cc.rochester.edu!prie@escher.cc.rochester.edu
From: prie@escher.cc.rochester.edu (Tod Rieger)
Newsgroups: comp.sys.next
Subject: Re: Memory
Message-ID: <14478@ur-cc.UUCP>
Date: 15 Jun 91 00:29:25 GMT
Sender: news@uhura.cc.rochester.edu
Organization: University of Rochester, Rochester NY
Lines: 15


     Seymour Cray foresaw that processor performance would
far outstrip I/O throughput. Consequently, Cray computers
do not have virtual memory: either your application is
entirely in physical memory or it's not running.

     Upgrading my standalone slab to 16Mb has all but
eliminated swapping -- only Improv's Presentation Builder
has a hint of it. TeX simply flies.

     Since disk I/O is limiting the 8Mb 040 on large apps,
a faster processor must be accompanied by more memory (as
EPS and Hess have stated) if there is to be any speedup.

     NeXTime.