Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!ucbvax!mtxinu!sybase!phobos!tim
From: tim@phobos.sybase.com (Tim Wood)
Newsgroups: comp.databases
Subject: Re: ORACLE REL 6, INGRES REL 6
Keywords: ORACLE, INGRES, RELEASE 6
Message-ID: <4185@sybase.sybase.com>
Date: 10 May 89 17:33:57 GMT
References: <1588@bilpin.UUCP>
Sender: news@sybase.sybase.com
Reply-To: tim@phobos.UUCP (Tim Wood)
Organization: Sybase, Inc.
Lines: 30

In article <1588@bilpin.UUCP> mcvax!ukc!icdoc!bilpin!nick (Nick Price) writes:
>
>Here's another thought -- Many multi-processor Unix machines are
>appearing on the market now, both loosley coupled (NCR Tower 8XX),
>and tightly coupled (Sequent), to mention just two. In my experience
>RDBMS performance can become an issue in such an environment, 

It's an issue in any environment.  In MP, the potential for (in-)efficiency
is much greater, since there is more CPU bandwidth to be (properly) used.

>particularly where bottle-necks are introduced by a single server
>architecture. 

Can you give examples of these bottlenecks?  Is your point theoretical
or from experience with a particular system?  If theoretical, could there
be a server design that exploits SMP architecture?

>Shared memory accesses between processors is another
>cause for concern. 

Why?  What do you perceive the issues to be?

>_______________________________________________________________________________
>Nick Price          SRL Data        || Apple link : UK0001


Sybase, Inc. / 6475 Christie Ave. / Emeryville, CA / 94608	  415-596-3500
tim@sybase.com          {pacbell,pyramid,sun,{uunet,ucbvax}!mtxinu}!sybase!tim
Voluntary disclaimer: This message is solely my personal opinion.
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