Newsgroups: comp.lang.smalltalk
From: Andy@cumulus.co.uk (Andy Moorley)
Path: cantaloupe.srv.cs.cmu.edu!rochester!udel!news.mathworks.com!newshost.marcam.com!usc!howland.reston.ans.net!swrinde!pipex!peernews.demon.co.uk!cumulus.co.uk!Andy
Subject: Re: ENVY/VW2.0 response problem
References: <RYzZcfr.wgoldring@delphi.com>
Organization: Cumulus Systems Ltd
Reply-To: Andy@cumulus.co.uk
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Date: Fri, 24 Feb 1995 08:42:07 +0000
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In article <RYzZcfr.wgoldring@delphi.com>
           wgoldring@delphi.com "William Goldring" writes:

> Meg. The most notable symptom is that all disk drives seem to be busy almost
> incessantly. We;ve cleaned up the image carefully. The PC's have between 16 and
> 32 Meg of Ram and Gig hard drives. However, when we run Norton Utilities with
> an ENVY image, it claims there is NO physical memory free.

Hmm? Several things to look at and try that I can think of.

1) Envy and VW2.0 really is memory hungery - we used to have 16MB on the PCs
but it ran like a pig - we tried a few other combinations but really only
32MB seemed to do for us !!

2) Do you have a garabage collection problem?  There seems to be some bugs and
features in VW2.0 which seems to stop some objects from being garbage collected.
If you have the advanced tools run a report of all size of the all the objects
in the image - we found we had 14MB of one of our own classes in there because
stuff was not be collected as we expected (fixed it by changing various
things to weak array etcs).  I also have a "Class Eater" class which just simply
gobbles up all instances of a given class - I can mail it to you if you like.

3) How big is your Envy library - a very big library with lots of method
editions does seem to slow down response from the emsrv (I assume you are using
emsrv).  If it's big it may be time to do a library clone.

I'm sure a few other people will be along shortly with answers I havn't thought
of.

Andy.


-- 
Andy Moorley      Cumulus Systems Ltd, Rickmansworth, Hertfordshire, UK
Andy @ cumulus.co.uk     Phone: +44 (0)1923 720477  Fax: +44 (0)1923 771411

     "Defining chaos as non-linear mathematics is like defining zoology
      as non-elephant biology" - Stanislaw Ulam.
