GNU bug report logs - #50353
Excessive temproots size when running guix build

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From: Ludovic Courtès <ludo <at> gnu.org>
To: Christopher Baines <mail <at> cbaines.net>
Cc: 50353 <at> debbugs.gnu.org
Subject: bug#50353: Excessive temproots size when running guix build
Date: Mon, 06 Sep 2021 23:18:18 +0200

Hi,

Christopher Baines <mail <at> cbaines.net> skribis:

> I spotted a problem with data.guix.gnu.org trying to process this old
> revision [1]
>
> 1: https://data.guix.gnu.org/revision/75dabac633bb9a33efbebf859f8aa4bb3b9582b2
>
> The machine ran out of disk space, as a ~30GiB file had been created in
> /var/guix/temproots.

Sounds fishy.  Those files contain a nul-separated list of GC roots
(store file names).  Thus, a file in there is proportional to the number
of ‘add-temp-root’ RPCs made by the client during the session.

A client with a long-running session (‘guix publish’, Coordinator, Data
Service, Cuirass, etc.) that regularly adds temp roots makes that file
grow endlessly.

HTH!

Ludo’.

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