[asterisk-users] Performance Issues Degradation After 6 Calls

[Steve Totaro]

Gordon Henderson wrote:
> On Fri, 28 Dec 2007, Steve Totaro wrote:
>
>   
>> broadband Voice wrote:
>>     
>>> On 12/27/07, *broadband Voice* <broadbandvoice at gmail.com
>>> <mailto:broadbandvoice at gmail.com>> wrote:
>>>
>>>     I am using Asterisk and A2billing Calling Card Platform and after
>>>     the 6th call the quality starts to degrade. The way it set up is
>>>     the user calls into the system then dial out so I have 12 channels
>>>     being used up but 6 active calls. Here are my specs Asterisk
>>>     SVN-branch-1.4-r79142 on a i686 running Linux Fedora 6, Pentium 4
>>>     Hyper-Threading, 64 bit, 1GB of RAM, 80 GB Sata Drive, bandwidth 4
>>>     Mbps (1300GB/Throughput) burstable to 100Mbps.
>>>
>>>     I am planning on upgrading to Intel Core 2 Duo with a clock speed
>>>     of 1.8GHZ and 2GB Ram. Does anyone have similar situation or
>>>     advice? Thanks.
>>>
>>>
>>>       
>> Your system should be able to handle that volume easily.
>>
>> What are you using for PSTN connectivity?
>>
>> I have heard of people having issues with Hyperthreading.  That could be
>> a problem, although I have never had any issues myself.
>>
>> What does top look like?
>>
>> When I had a similar issue (voice quality while running monitor on over
>> seventy calls) I found a small Linux CLI app, I cannot remember the name
>> of it but it would give IO stats (I think it may be named IOStat or
>> something similar) and I could see right where the bottleneck was
>> (obviously disc IO but I was able to see exactly where the breaking
>> point was).  That may help identify something.
>>     
>
> Try:
>
>    vmstat 1
>
> IIRC, iostat is a *BSD type utility, but it's been many years since I 
> touched BSD!
>
> It is possible to graph disk IO as well as network packet IO if required 
> using (eg) MRTG.
>
> Gordon
>
>   

http://www.linuxquestions.org/linux/articles/Jeremys_Magazine_Articles/Hunting_I_O_Bottlenecks_with_iostat

Thanks,
Steve Totaro