[Systems] Apache stalled on sunjammer today

[Sam P.]

Hi Sebastian,

We don't need buildbot running for sure - it hasn't had any bots running
for maybe even 12 months.

We only use buildbot for rebuilding developer.slo - but I can replace that
with something like the help rebuilder [1] and move that over to freedom.

Thanks,
Sam

[1]  https://github.com/sugarlabs-infra/help-rebuilder

On Sat, Jul 18, 2015 at 1:37 PM Sebastian Silva <sebastian at fuentelibre.org>
wrote:

> Apache error.log was reporting:
> [Fri Jul 17 10:14:00 2015] [emerg] (22)Invalid argument: couldn't grab the
> accept mutex
>
> And apache services were down. It was refusing to restart itself.
>
> I asked Bernie and he  told me "looks like we ran out of semaphores..."
>
> So i learned the *icps* command.
>
> $ sudo ipcs -s
>
> ------ Semaphore Arrays --------
> key        semid      owner      perms      nsems
> 0x002fa327 32769      root       666        2
> 0x0052e2c1 348618763  postgres   600        17
> 0x0052e2c2 348651532  postgres   600        17
> 0x0052e2c3 348684301  postgres   600        17
> 0x0052e2c4 348717070  postgres   600        17
> 0x0052e2c5 348749839  postgres   600        17
> 0x0052e2c6 348782608  postgres   600        17
> 0x0052e2c7 348815377  postgres   600        17
> 0x0052e2c8 348848146  postgres   600        17
> 0x0052e2c9 348880915  postgres   600        17
> 0x0052e2ca 348913684  postgres   600        17
> 0x0052e2cb 348946453  postgres   600        17
> 0x0052e2cc 348979222  postgres   600        17
> 0x0052e2cd 349011991  postgres   600        17
>
> So I restarted postgres database and after that, apache was able to
> restart.
>
> Sunjammer is running a lot of stuff, I also notice buildbot using a lot of
> memory, is it under use?
>
> Do we need 2 databases? mysql and postgres are running...
>
> Perhaps it would be nice to purge sunjammer of unneeded services?
>
> Thanks Bernie for expert advice.
>
> Regards,
> Sebastian
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