GNU bug report logs - #51787
GC takes more than 9 hours on berlin

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Message #46 received at 51787 <at> debbugs.gnu.org (full text, mbox):

From: Ludovic Courtès <ludo <at> gnu.org>
To: Mathieu Othacehe <othacehe <at> gnu.org>
Cc: 51787 <at> debbugs.gnu.org
Subject: Re: bug#51787: GC takes more than 9 hours on berlin
Date: Fri, 10 Dec 2021 22:54:51 +0100

Mathieu Othacehe <othacehe <at> gnu.org> skribis:

>> Still, I’m surprised a mere ‘rm -rf’ can take this long.  ‘strace -T’ on
>> the child guix-daemon process doesn’t reveal anything obviously wrong,
>> pause times or similar.
>
> I noticed that the process isn't around anymore. Did anyone killed it,
> or maybe it just crashed? Also noticed some trash removing commands were
> running. Regardless of the root cause of the problem, getting rid of the
> trash directory before the next evaluation seems like a good idea.

Yeah I don’t know what happened to the GC process but it disappeared
earlier today.  Then I started things like this:

  unshare -m sh -c 'mount --bind -o remount,rw /gnu/store; rm -rf --one-file-system /gnu/store/trash/[abc]*'

which is equally slow (perhaps slightly slower: it seems to do more
syscalls per file to remove than the guix-daemon code).

Anyway, I’ll let it run hoping it’ll be done by the next GC.

Ludo’.

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