[tor-relays] Ubuntu is killing tor when getting low memory

[toxi roxi]

Hi David,

thank you very much for your hints - i got now a better picture on how this
could work on my ubuntu relay. Very interesting infos - thanks!
I've setup some tweaks now - lets see how it works.
If you are interested what i have did and if it helped - just let me know -
i will drop you a message in a week or two.

Thanks!
Geri


2014-02-01 David Stainton <dstainton415 at gmail.com>:

> Hi Geri!
>
> You may adjust the Linux OOM killer's settings on a per process basis
> with the proc fs; see here:
> http://askubuntu.com/questions/60672/how-do-i-use-oom-score-adj
>
> If you have multiple numa cores then it also might be helpful to set
> the process to use numa interleaved memory
> instead of just it's local numa memory bank... see numactl for more
> information about that. Jeremy Cole wrote
> an interesting article about tuning mysql with numactl a while back.
>
> Some people advise keeping a sacrificial lamb process that gets
> oom-killed first.
>
> Also I always like to disable swap completely (e.g. swapoff -a)... but
> sometimes I meet sys admins that
> try to argue that having some swap is a good idea; i am not convinced.
> swap is so 1992.
>
> I didn't explain everything or go into all the details here... so feel
> free to ask me questions if you have some
> problems or if something is unclear.
>
> Cheers!
>
> David
>
>
> On Sat, Feb 1, 2014 at 12:41 PM, toxi roxi <toxiroxi at gmail.com> wrote:
> > Hi Folks,
> >
> > im running many relays which are doing a nice job. But i have also some
> > smaller relays outside which have just 256mb.
> > They are performing quite quell - but on one relay im facing issues
> which i
> > think you may help me.
> >
> > this relay seems to ran out of memory from time to time (2 to 5 days)
> and i
> > found out via dmesg, that ubuntu itself is killing the process to free up
> > memory.
> > the swap is used, but far away from full.
> >
> > as this stops tor immediately its bit annoying that i need to restart the
> > releay without any reason.
> >
> > is there any way to tell ubuntu or to prevent that the tor process is
> killed
> > for freeing up memory?
> >
> > i dont care about other processes as this machine is for tor purposes
> only.
> >
> > thanks for your expertise!
> > Geri
> >
> > _______________________________________________
> > tor-relays mailing list
> > tor-relays at lists.torproject.org
> > https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-relays
> >
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