Open Stack

On 09/29/2014 01:34 PM, Nader Lahouti wrote:
> On Mon, Sep 29, 2014 at 9:58 AM, Jay Pipes <jaypipes at gmail.com
> <mailto:jaypipes at gmail.com>> wrote:
>
>     On 09/29/2014 12:48 PM, Nader Lahouti wrote:
>
>         Hi Jay,
>
>         I login first and the recreated the problem and here is the log:
>         http://paste.openstack.org/__show/116776/
>         <http://paste.openstack.org/show/116776/>
>
>
>     OK. Looks like there isn't anything wrong with your setup. I'm
>     guessing you have set up Keystone to run in Apache with 10 worker
>     processes, and you have the workers config option setting in
>     nova.conf, neutron.conf and all the other project configuration
>     files set to 0, which will trigger a number of worker processes
>     equal to the number of CPU cores on your box, which I'm guessing
>     from looking at your SHOW FULL PROCESSLIST is around 24-32 cores.
>
>
> I haven't modified the default values in *.conf files (I'm using
> devstack for installation) for workers setting.
> How  to check that keystone is using apache with 10 worker process?
> And the number of CPU cores on my box is 32.

OK, as I suspected.

>     Solution: either lower the workers configuration option from 0 to
>     something like 12, or increase the max_connections setting in your
>     my.cnf to something that can handle the worker processes from all
>     the OpenStack services (I'd recommend something like 2000).
>
>
> Just for clarification, regarding the setting of workers option in the
> *.conf file:
> Fore neutron:
> # api_workers = 0
>
> For nova, what option should be set?
> I see  these options:
> metadata_workers=None	(IntOpt)Number of workers for metadata service

You can keep all those options as-is (the default of 0) and just set 
your my.cnf max_connections variable to 2000.

Best,
-jay