Does gnu emacs ever compact its heap

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Article #98326

#98326

From: Tim McNerney
Date: Tue, 15 Oct 1991 22:04

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   Date: Tue, 15 Oct 91 18:02:15 EDT
   From: Robert L Krawitz <rlk@Think.COM>

      Date: Tue, 15 Oct 91 17:46:40 EDT
      From: Tim McNerney <TimMcN@Berlin.Think.COM>

      My officemate has noticed that gmacs thrashes more and more the
      longer gmacs has been running (eg. days, weeks).  Getting rid of
      buffers does not seem to help.  This has led me to wonder
      whether emacs ever compacts its heap.  If it did, I suppose that
      the GC doesn't have to page as frequently while GCing.  This
      behavior is especially noticeable on a SPARCstation 1 with 4Mb
      of physical memory.  Regardless of the size of image (eg. 11Mb),
      no more than 1.6Mb appear to ever be resident.

   It never compacts its buffer space.  The lisp heap is compacted.

How does this explain the thrashing behavior?

--Tim

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From: TimMcN@think.com (Tim McNerney)
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Subject: Does gnu emacs ever compact its heap
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Date: 15 Oct 91 22:04:55 GMT
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