home *** CD-ROM | disk | FTP | other *** search
- Newsgroups: comp.sys.mac.system
- Path: sparky!uunet!elroy.jpl.nasa.gov!sgrenander@NASAMAIL.JPL.NASA.GOV
- From: sgrenander@NASAMAIL.JPL.NASA.GOV (Sven Grenander)
- Subject: Re: 7.x.x Finder Heap Allocation ?
- Message-ID: <1992Sep8.175035.18030@elroy.jpl.nasa.gov>
- Sender: news@elroy.jpl.nasa.gov (Usenet)
- Nntp-Posting-Host: mac4.jpl.nasa.gov
- Organization: Jet Propulsion Laboratory
- References: <1992Sep1.164852.29038@elroy.jpl.nasa.gov> <1992Sep2.191821.22486@newsgate.sps.mot.com> <boyd-080992001653@kip2-50.apple.com>
- Date: Tue, 8 Sep 1992 17:50:35 GMT
- Lines: 47
-
- In article <boyd-080992001653@kip2-50.apple.com>, boyd@apple.com (Scott Boyd) writes:
- >
- > In article <1992Sep2.191821.22486@newsgate.sps.mot.com>,
- > gpb@gpb-mac. (greg berryman ) wrote, suggesting that you alter the Finder
- > to give it a larger heap.
- >
- > Don't do this. It won't get you what you want. Finder has two sub-heaps,
- > and their sizes are fixed. You won't be altering their sizes when you
- > adjust
- > the Finder's heap size.
- >
- > It is far more likely that you are running out of Finder heap because some
- > poorly-written software is allocating memory in other people's heaps,
- > including Finder's. You might try looking through your extensions to
- > see if you can spot the offender.
- >
- > scott
- > boyd@apple.com
- >
- >
- Scott,
-
- Given your address I would assume that you know what you are talking about,
- but empirical evidence overwhelmingly shows that increasing the Finder
- heap size reduces the problems that I (and at least a few others) have had.
- If you are correct, then the empirical evidence seems to imply that the
- increased Finder heap allocation cures the symptom (OOM warnings and random
- crashes) but not the underlying problem (misbehaving extensions was your
- suggestion).
-
- Do you have any suggestions for how one would go about tracking down these
- underlying problems ? Is there for example any system 7 MemWatcher utility
- which could help trap offending apps or extensions ?
-
- A review of IM VI is no doubt in order if one is to understand the two sub-
- heaps that you mention, is there some other information source that you can
- recomend, such as a TN or something similar which addresses this specific
- issue ? In particular, is there any reference which describes how a fixed heap
- can satisfy the requirements from the lowest Mac to one at the high end with
- dozens of simultaneously running apps, tens of disk partitions, zillions of
- open windows over half a dozen monitors, gobs of open files and who-knows-how-many
- extensions ?
-
- Thanks,
-
- -Sven
-
-