[Systems] Apache stalled on sunjammer today

[Bernie Innocenti]

Nice, let's kill buildbot then.

As for postgresql + mysql: unfortunately, mysql is used by a lot of 
stuff and postgres is a hard requirement for mirrorbrain, which needs a 
a special geolocation index not supported by mysql.

On 17/07/15 23:44, Sam P. wrote:
> 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 <mailto: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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>
>
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-- 
  _ // Bernie Innocenti
  \X/  http://codewiz.org