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bug#30290: guix-daemon slows to a crawl when a substitute server is offl
From: |
Ludovic Courtès |
Subject: |
bug#30290: guix-daemon slows to a crawl when a substitute server is offline |
Date: |
Tue, 22 Dec 2020 16:16:08 +0100 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/27.1 (gnu/linux) |
Hi,
Maxim Cournoyer <maxim.cournoyer@gmail.com> skribis:
> 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.
Is it still a problem? Commit 4f5234be0378368e6af25925db46612838d25e58
(Nov. 2019) added a table of unreachable hosts. That way, a ‘guix
substitute --query’ process won’t retry connections to an unreachable
host.
Ludo’.