Path: utzoo!attcan!uunet!lll-winken!lll-tis!ames!mailrus!tut.cis.ohio-state.edu!rutgers!apple!tecot
From: tecot@Apple.COM (Ed Tecot)
Newsgroups: comp.sys.mac
Subject: Re: Why does the system heap grow with multifinder and System 4.2?...
Message-ID: <16328@apple.Apple.COM>
Date: 30 Aug 88 06:28:19 GMT
References: <12422786824.175.G.GUTOW@LEAR.STANFORD.EDU>
Reply-To: tecot@apple.com.UUCP (Ed Tecot)
Organization: Apple Computer Inc, Cupertino, CA
Lines: 17

In article <12422786824.175.G.GUTOW@LEAR.STANFORD.EDU> G.GUTOW@LEAR.STANFORD.EDU (Jonathan Gutow) writes:
>I'm using system 4.2 and multifinder on an old mac upgraded with the 128K
>ROMs and an 800K disk drive.  I've noticed that initially on switch launching
>to multifinder the system heap takes up about 252K of memory.  After I've
>started and quit afew applications such as RedRyder and WriteNow(1.07 patched
>for multifinder) the heap size gains about 100K.  It seems to me that
>when you are back to a minimal configuration of running the finder and the
>system the system heap size should collapse back down to its original size.

There are two possible reasons:
1) Some applications tend to lock system resources and don't release them
   when they exit.  This tends to cause a slow increase in system heap usage.
   It can only be fixed by fixing the applications.
2) MultiFinder doesn't reduce the system heap unless there is a good reason
   to do so.  So, if you don't need the memory, MultiFinder will keep it in
   the system heap.

						_emt