Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10.2 9/18/84; site brl-tgr.ARPA
Path: utzoo!linus!philabs!cmcl2!seismo!brl-tgr!ron
From: ron@brl-tgr.ARPA (Ron Natalie <ron>)
Newsgroups: net.arch
Subject: Re: Out of Virtual Memory?
Message-ID: <10217@brl-tgr.ARPA>
Date: Thu, 25-Apr-85 21:47:44 EST
Article-I.D.: brl-tgr.10217
Posted: Thu Apr 25 21:47:44 1985
Date-Received: Sat, 27-Apr-85 05:42:52 EST
References: <1515@decwrl.UUCP> <581@ahuta.UUCP>
Organization: Ballistic Research Lab
Lines: 16

> In theory, no you can't run out of virtual memory.  But computer
> systems limit how much of it you can address.  For example IBM's
> MVS pre-XA uses 24 bit addressing so you can only use up to 16Mb
> of virtual memory. Which by the way, is not enough for some of our
> users.  That's why we are going to MVS/XA and 31 bit addressing.

Ahem, we seem to be having some difficulty with the term virtual
here.  Virtual memory is the use of more memory than you have physically.
If I have an 8K system with a 16K paging area, I run out of virtual memory
at 24K (assuming an optimal solution).  No where in the definition of
virtual memory does it say "infinite" amounts are available.

-Ron

Probably one of those people who thought that the infinite speed motor
controls allowed you to make the motors go infinitely fast.