Do you operate Kamilio in a wholesale environment with many CPS? On Thu, Jan 7, 2016 at 12:22 PM, Alex Balashov <abalas...@evaristesys.com> wrote:
> Vik, > > We have used pipelimit at a sampling interval of 1 second, and, on the > basis of contact with reality, decided to shift to a 3-second sampling > window. > > The major problem with the 1-second interval is not the CPU usage, but > that it's not very useful. Such a sampling window is extremely responsive > to fluctuations within a short time, and this manifests very well in SIPP > testing. > > However, SIPP generates calls in an orderly and linear fashion. Real-world > SIP traffic is highly bursty and volatile. The result is that a 1-second > sampling window will not properly encapsulate the data so as to reliably > enforce a CPS limit of X. For example, if you set a limit of 300 CPS, the > short sampling window makes it quite possible to burst far beyond 300 CPS > as long as it is done within < 50% of the duty cycle. > > 3 seconds is a more realistic compromise. In virtue of smoothing some > peaks, it is less dynamic and responsive, but it far more accurately takes > into account the bursty and chaotic nature of real-world high-volume call > setups. These are not modeled well with SIPP testing. > > -- Alex > > > -- > Alex Balashov | Principal | Evariste Systems LLC > 303 Perimeter Center North, Suite 300 > Atlanta, GA 30346 > United States > > Tel: +1-800-250-5920 (toll-free) / +1-678-954-0671 (direct) > Web: http://www.evaristesys.com/, http://www.csrpswitch.com/ > > _______________________________________________ > SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list > sr-users@lists.sip-router.org > http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users >
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