[Freeswitch-users] Tuning Up Freeswitch

[Antonio Teixeira]

Yes a default installation of debian ( minimal/base ) also take into
consideration this install was before that wiki warning regarding the
divider of the kernel HZ thingy.


2011/4/27 François Delawarde <fdelawarde at wirelessmundi.com>

> Did you use the default kernel in your debian setup?
>
> François.
>
> On Wed, 2011-04-27 at 10:30 +0000, Antonio Teixeira wrote:
> > Just a little update for you guys.
> >
> > I have jumped from debian to centos did a full reinstall +  Raid 1 +
> > DB in Ram.
> >
> > And was able to get 78 Simult. Calls at only 10 % CPU so there is a
> > huge difference so far from 120 % on debian :\.
> > Call quality has improved , local lan call quality has rised , G729
> > Licenses working again thanks Brian West !!!.
> >
> > I will now start to deploy our IVRs using ESL to see if i can offload
> > some of the load.
> >
> > Regards
> > A/T
> >
> >
> > 2011/4/27 Paul Cupis <paul at cupis.co.uk>
> >         On 27/04/11 01:24, Ariel Monaco wrote:
> >         > We had high CPU utilization peaks in the past, which lead to
> >         some
> >         > audio issues (clipping). We were using debian at that time,
> >         which
> >         > was a customer-side requirement.
> >         >
> >         > I'm not a kernel guru but I remember this had something to
> >         do with
> >         > kernel timer cycles and the issue was address by adding
> >         "divider=10"
> >         > or "divider=100" as a kernel's boot loader option.
> >
> >
> >         Interesting. This kernel option is designed to reduce the valy
> >         of
> >         CONFIG_HZ at run=time, so if you have a 1000Hz kernel, setting
> >         divider=10 at boot time will effectively give you a 100Hz
> >         kernel.
> >
> >         This seems to fly in the face of other recommendations on this
> >         kernel
> >         setting!
> >
> >         Debian default kernel sets CONFIG_HZ=100
> >         CentOS default kernel sets CONFIG_HZ=1000
> >
> >         Regards,
> >
> >
> >
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