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From: zimoun <zimon.toutoune@gmail.com>
To: Maxim Cournoyer <maxim.cournoyer@gmail.com>
Cc: 30290@debbugs.gnu.org
Subject: bug#30290: guix-daemon slows to a crawl when a substitute server is offline
Date: Thu, 03 Dec 2020 01:20:07 +0100	[thread overview]
Message-ID: <86mtyvzqo8.fsf@gmail.com> (raw)
In-Reply-To: <87fu6o2ge2.fsf@gmail.com> (Maxim Cournoyer's message of "Mon, 29 Jan 2018 22:07:49 -0500")

Hi Maxim,

On Mon, 29 Jan 2018 at 22:07, Maxim Cournoyer <maxim.cournoyer@gmail.com> wrote:
> When a substitute server used by guix-daemon is offline, the daemon will
> keep attempting to connect to it, even when it shouldn't need any data
> (ran 'sudo guix system reconfigure my-config.scm' multiple times in a
> row.
>
> With the disconnected server (bayfront in my case), that command would
> take close to 8 minutes, with many system calls like:
>
> connect(14, {sa_family=AF_INET, sin_port=htons(443), sin_addr=inet_addr("141.255.128.56")}, 16) = -1 EINPROGRESS
>
> which wasted 5 seconds each time.
>
> After removing this server from my substitute servers list, the same
> operation (system reconfigure) is 8 times faster (1 minute).
>
> Suggestion: the daemon should stop trying to use the offline substitute
> server after trying for X times, and print a warning about it.

This looks like as a wishlist, right?  Do it make sense to include such
feature to the recent discussions about the revamp of offloading,
Cuirass, publish, etc.


All the best,
simon




  reply	other threads:[~2020-12-03  0:27 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-01-30  3:07 bug#30290: guix-daemon slows to a crawl when a substitute server is offline Maxim Cournoyer
2020-12-03  0:20 ` zimoun [this message]
2020-12-19  3:04   ` Maxim Cournoyer
2020-12-22 15:16 ` Ludovic Courtès
2020-12-28 12:19   ` Efraim Flashner
2021-03-24 21:55 ` zimoun
2021-06-09 21:34   ` zimoun
2021-07-13  8:49     ` zimoun
2021-08-18 11:19       ` zimoun
2021-08-18 13:18       ` Maxim Cournoyer
2021-08-19  1:54         ` Maxim Cournoyer
2021-08-19  2:25           ` Maxim Cournoyer
2022-03-23 10:50             ` zimoun
2022-10-08 14:57               ` zimoun
2022-10-10  3:03                 ` Maxim Cournoyer

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