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From: warner@scubed.com (Ken Warner)
Newsgroups: comp.lang.smalltalk
Subject: Re: Running out of memory with PPS 2.5
Message-ID: <676@scubed.SCUBED.COM>
Date: 14 Apr 91 01:34:35 GMT
References: <12659@pt.cs.cmu.edu>
Sender: usenet@scubed.SCUBED.COM
Followup-To: comp.lang.smalltalk
Distribution: comp
Organization: S-CUBED, A Division of Maxwell Labs; San Diego CA
Lines: 38

In article <12659@pt.cs.cmu.edu> dr1b@cive.ri.cmu.edu (Dionysis Rigopoulos) writes:
[stuff deleted]
>   I am trying to transfer the code I developed in version 2.3 to Objectworks
>2.5 and run out of space (on a Mac ci with 8 MB of memory, where memory
[etc]
>   I run Objectworks under multifinder, so I played with different values
>of required memory, and was surprised by the results:
>With 4000 K of required memory, after garbage collecting I have 792036 free
>bytes. With 6971 K of memory, I only get 1421900 free bytes. Where do the

Forget the numbers, they don't tell you anything useful.

I run large (>4 meg) images all the time on a Mac II and IIcx.  The
tricks I use:

First get 16 Meg of real memory and Maxima from Connectix.  If you can't 
swing 16 Meg of real memory get Virtual from Connectix.  Both give you a little
over 14 Meg of memory *UNDER FINDER*.  Under MultiFinder you will only get 
8 Meg - System - Finder memory *THIS IS IT...ALL YOU GET...YOU DON'T
GET NO MORE!*   I have the application memory size set to 7000k and my 
System cut down to a little less than 1 Meg.  Few INIT's, CDEV's and/or
DA's.  Configured this way I can run Smalltalk with a 4+ Meg image, MS-Word
and a draw program.  But I garbage collect *ALOT*.

So if I have a lot of hacking to do and I don't want to garbage collect
every 4 minutes, I run under Finder.  Finder will let you use all 14 Meg
of memory.  It works great! Remember I'm using Connectix stuff.

Last meaningful trick:

Inspect Object class variable DependentFields.  This guy can sponge up
a lot of zombies.  But be careful what you loose from DependenFields--you
can really hose yourself.

Cheers!

Ken Warner
warner@scubed.scubed.com