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@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@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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