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From: Eli Zaretskii <eliz@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: Porting my conf to 28.0.60 (MS Windows + native-comp)
Date: Mon, 18 Oct 2021 15:16:31 +0300
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To: Corwin Brust <corwin@bru.st>
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 (message from Corwin Brust on Sun, 17 Oct 2021 20:51:02 -0500)
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> From: Corwin Brust <corwin@bru.st>
> Date: Sun, 17 Oct 2021 20:51:02 -0500
> Cc: Emacs developers <emacs-devel@gnu.org>
> 
> ;; tweaks for native-comp
> ;; https://ddavis.io/posts/emacs-native-centos7/#deferred-and-asynchronous-compilation
> ;; via https://github.com/jwiegley/emacs-async/issues/96
> ;; helper boolean I use here and later in my init.el
> 
> (defconst my-using-native-comp
>   (and (not (version< emacs-version "28.0"))
>        (fboundp 'native-comp-available-p)
>        (native-comp-available-p))
>   "Indicates we are using native compilation (via libgccjit).")
> 
> (when my-using-native-comp
>   (message "Native compilation is avialable; throttling")
>   (setq native-comp-deferred-compilation t)
>   (setq native-comp-async-query-on-exit t)
>   (setq native-comp-async-jobs-number 4)
>   (setq native-comp-async-report-warnings-errors nil))

I see nothing here that could cause Emacs to spawn too many child
processes for native-compilation: you limit the number of simultaneous
sub-processes to 4, which shouldn't be a problem.

So I still think you should try preparing a reproducer for that
strange error message.  When it happens, could you perhaps see how
many network connections does Emacs have (with, for example, netstat)?