Re: [Xen-devel] [OSSTEST PATCH v11 11/20] ts-openstack-deploy: Increase fd and memory limits for rabbitmq

[Anthony PERARD <anthony.perard@xxxxxxxxxx>]

On Fri, Jun 23, 2017 at 04:34:41PM +0100, Ian Jackson wrote:
> Anthony PERARD writes ("Re: [OSSTEST PATCH v11 11/20] ts-openstack-deploy: 
> Increase fd and memory limits for rabbitmq"):
> > On Fri, Jun 23, 2017 at 02:41:59PM +0100, Ian Jackson wrote:
> > > Anthony PERARD writes ("[OSSTEST PATCH v11 11/20] ts-openstack-deploy: 
> > > Increase fd and memory limits for rabbitmq"):
> > > > Signed-off-by: Anthony PERARD <anthony.perard@xxxxxxxxxx>
> > > 
> > > Does this not mean that the upstream defaults are wrong ?
> > 
> > That depends on what you meant by upstream.
> > 
> > On Ubuntu, the limit of open fd is set to an higher value via the
> > systemd unit file. It does not look like devstack (OpenStack) is
> > changing this.
> > 
> > In devstack, I've seen an increate of the limit of open fd, but via
> > systemd, so for all systemd services.
> 
> And if one isn't using systemd ?

I guess it would have to fix devstack. Also, the default is 1k, devstack
increase it to 2k, but rabbitmq on Ubuntu have a limit at 65k.

> > As for the memory limit, it was necessary with a host of 4G of RAM. But
> > I did not try again with the default limit and a host with 6G of RAM.
> > (The default is 0.4, here I've set it to 0.8)
> 
> It sounds like the default calculation is not right, then ?

I think 0.4 means 40% of the RAM. Sorry, I should have said so. Also,
0.4 is the same on the CI loop, with a dom0 of 7G or so.

-- 
Anthony PERARD

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