bug#51787: GC takes more than 9 hours on berlin

[zimoun]

Hi,

On Fri, 12 Nov 2021 at 12:51, Mathieu Othacehe <othacehe@gnu.org> wrote:

> On berlin, the daily GC command is still running whereas it was started
> 9 hours ago.
>
> --8<---------------cut here---------------start------------->8---
> guix processes
> [...]
> SessionPID: 37231
> ClientPID: 37195
> ClientCommand: 
> /gnu/store/49vfv8l1j96bbd73ssbqanpnjz83arss-guix-1.3.0-11.014f1b6/libexec/guix/guile
>  \ /gnu/store/49vfv8l1j96bbd73ssbqanpnjz83arss-guix-1.3.0-11.014f1b6/bin/guix 
> gc -F10995116277760
> --8<---------------cut here---------------end--------------->8---
>
> and
>
> --8<---------------cut here---------------start------------->8---
> mathieu@berlin ~$ ps auxww|grep 37195
> root      37195  0.0  0.0 183260 33440 ?        Sl   03:59   0:00 
> /gnu/store/49vfv8l1j96bbd73ssbqanpnjz83arss-guix-1.3.0-11.014f1b6/libexec/guix/guile
>  \ /gnu/store/49vfv8l1j96bbd73ssbqanpnjz83arss-guix-1.3.0-11.014f1b6/bin/guix 
> gc -F10995116277760
> --8<---------------cut here---------------end--------------->8---
>
> That's really problematic as it is blocking some other berlin services
> such as Cuirass, which has 4564 packages in its fetch queue:
>
> --8<---------------cut here---------------start------------->8---
> mathieu@berlin ~$ less /var/log/cuirass-remote-server.log
> [...]
> 2021-11-12T12:47:01 period update: 0 resumable, 0 failed builds.
> 2021-11-12T12:47:01 period update: 4564 items in the fetch queue.
> --8<---------------cut here---------------end--------------->8---

How is it possible to investigate?

Cheers,
simon