Re: guix-daemon hitting systemd TasksMax

[Joram Schrijver]

On Sat, Apr 16, 2016, at 03:29 AM, Leo Famulari wrote:
> On Fri, Apr 15, 2016 at 01:37:32AM +0200, Joram Schrijver wrote:
> > Hi,
> > 
> > In version 228, systemd introduced a unit attribute `TasksMax`[1] that
> > limits the number of tasks that can run in a unit. It has effect on
> > kernel versions 4.3 and up, kernel threads and userspace process count
> > towards the limit, and the default value is 512.
> > 
> > Running `guix pull` without changing any settings crashed for me,
> > because building/testing texinfo hit this task limit. Increasing it to
> > 1024 using `systemctl set-property guix-daemon.service TasksMax=1024`
> > fixed the problem.
> 
> Interesting. What operating system are you using? I'm running systemd
> 229 on Debian testing and I don't have this issue, nor have I altered
> this setting.
> 
> It would be useful to know what the difference is between our systemd
> installations.  I don't see anything related to TasksMax in
> systemd-229's NEWS:
> 
> https://github.com/systemd/systemd/blob/master/NEWS

I am running Arch Linux, also with systemd 229. It doesn't look like
Debian applies any patches to systemd, so our installations should
pretty much be the same.

Perhaps the limit is only reached during the build process of some
specific packages?

--
  Joram