GNU bug report logs - #66997
nar-herder uses 10 GiB of resident memory, 100% CPU on hydra-guix-129

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Maxim Cournoyer <maxim.cournoyer <at> gmail.com>
Cc: tracker <at> debbugs.gnu.org
Subject: bug#66997: closed (nar-herder uses 10 GiB of resident memory,
 100% CPU on hydra-guix-129)
Date: Mon, 03 Jun 2024 00:32:02 +0000

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Your message dated Sun, 02 Jun 2024 20:22:01 -0400
with message-id <87ttiakh92.fsf <at> gmail.com>
and subject line Re: bug#66997: nar-herder uses 10 GiB of resident memory, 100% CPU on hydra-guix-129
has caused the debbugs.gnu.org bug report #66997,
regarding nar-herder uses 10 GiB of resident memory, 100% CPU on hydra-guix-129
to be marked as done.

(If you believe you have received this mail in error, please contact
help-debbugs <at> gnu.org.)


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66997: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=66997
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From: Maxim Cournoyer <maxim.cournoyer <at> gmail.com>
To: bug-guix <bug-guix <at> gnu.org>
Cc: Christopher Baines <mail <at> cbaines.net>
Subject: nar-herder uses 10 GiB of resident memory, 100% CPU on hydra-guix-129
Date: Tue, 07 Nov 2023 22:51:37 -0500

Hi,

I was looking at top on the hydra-guix-129 node, which runs nar-herder,
and saw this:

--8<---------------cut here---------------start------------->8---
4772 nar-her+  20   0   28.9g  11.5g 100.0   6.1     55,55 S .nar-herder-rea
--8<---------------cut here---------------end--------------->8---

11.5 GiB of memory seems a bit excessive, no?  Its cumulated processing
time is also at the top of the table, and it seems stuck at 100% of CPU
usage.

Is this expected of the nar-herder, or has it gone awry?

-- 
Thanks,
Maxim

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From: Maxim Cournoyer <maxim.cournoyer <at> gmail.com>
To: Christopher Baines <mail <at> cbaines.net>
Cc: 66997-done <at> debbugs.gnu.org
Subject: Re: bug#66997: nar-herder uses 10 GiB of resident memory, 100% CPU
 on hydra-guix-129
Date: Sun, 02 Jun 2024 20:22:01 -0400

Hi,

Maxim Cournoyer <maxim.cournoyer <at> gmail.com> writes:

> Hi,
>
> Christopher Baines <mail <at> cbaines.net> writes:
>
>> Maxim Cournoyer <maxim.cournoyer <at> gmail.com> writes:
>>
>>> I was looking at top on the hydra-guix-129 node, which runs nar-herder,
>>> and saw this:
>>>
>>> 4772 nar-her+  20   0   28.9g  11.5g 100.0   6.1     55,55 S .nar-herder-rea
>>>
>>> 11.5 GiB of memory seems a bit excessive, no?  Its cumulated processing
>>> time is also at the top of the table, and it seems stuck at 100% of CPU
>>> usage.
>>>
>>> Is this expected of the nar-herder, or has it gone awry?
>>
>> I think hydra-guix-129 was running an older version of the nar-herder,
>> so I've updated it and I think that's improved the situation.
>>
>> I've just reconfigured the machine to use a specific commit at the
>> moment, but it would be good to bump the commit that the Guix package is
>> using.
>
> The situation appears unresolved; c.f. `top' output on hydra-guix-129:
>
> 62775 nar-her+  20   0  903.7g  93.9g   0.0  49.8     22,44 S  `- fibers 0 

This has since been resolved; it currently uses 675.6 MiB on
hydra-guix-129.

Thanks, Christopher!

-- 
Thanks,
Maxim

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