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From: Eli Zaretskii <eliz@gnu.org>
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Subject: Re: Observing lags or never ending processes
Date: Tue, 20 Sep 2022 14:20:52 +0300
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In-Reply-To: <YylEsC+WhzoBXk3R@protected.localdomain> (message from Jean Louis
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> Date: Tue, 20 Sep 2022 07:42:24 +0300
> From: Jean Louis <bugs@gnu.support>
> Cc: help-gnu-emacs@gnu.org
> 
> > > Today I was waiting 1 hour for garbage collection, two times, before I
> > > killed Emacs.
> > 
> > Did you change the GC thresholds?  (I asked that above, but you didn't
> > answer.)
> 
> For now I keep the default.

Then I very much doubt that those long waiting periods are due to GC.
It's something else.

The way to find out what Emacs does when it hangs like that is to
attach a debugger and produce a backtrace.