[Freeswitch-users] XML_CURL max connection limit

Wed Jun 12 16:19:10 MSD 2013

Steven, i am using soft timer. Should i try another? Please suggest.

Cal, no there is nothing unusually changes in RAM or CPU. BTW, i have 24
CPU cores with 16 GB of RAM on each server. Regarding CPU graph, how can i
enable it.

Thank you.

On Wed, Jun 12, 2013 at 1:15 PM, Cal Leeming [Simplicity Media Ltd] <
cal.leeming at simplicitymedialtd.co.uk> wrote:

> This sounds quite interesting.. From my own benchmarks, I've seen that
> IVRs applications can be quite stressful on the server.
>
> Have you checked to see if there is a CPU util spike or context switching
> spike during these tests? Perhaps you are hitting the floor limit of what
> your CPU is capable of?
>
> Do you have CPU graphs? If not, can you enable them and try again?
>
> Cal
>
>
> On Wed, Jun 12, 2013 at 10:21 AM, Muhammad Shahzad <shaheryarkh at gmail.com>wrote:
>
>> You are right. After many improvements and modifications to dail plan,
>> removing unnecessary modules and using Ngnix web server, things are much
>> better now. Except that directory information is fetched 3 times per call
>> and there are overall 4 HTTP hits in a single call (3 for user + 1 for dial
>> plan).
>>
>> Since Monday, we have started analyzing the results of load test,
>> specially looking into packet traces, voicemail recordings and so on. We
>> observed a strange thing, although we were able to test 1536 concurrent
>> calls (the limit we deliberately put in switch.xml.conf) at up to 64 calls
>> per second rate. But there is strange and unexplained delay in starting RTP
>> from FS side.
>>
>> FS plays an IVR in early media state, then answers the call to directly
>> start recording voicemail. The problem is if call rate is under 25 CPS,
>> everything works fine. At 25 CPS there is minor delay in starting RTP in
>> early media state. This delay is negligible after processing few hundred
>> thousand calls but after about 1.2 million calls the delay has creeps up to
>> about 1.2 seconds. After 30 CPS this delay is significantly increases to 2
>> second after around 400 calls had done. At 50 CPS its ~3 second and after
>> 60 CPS its around 4 seconds. Interesting thing is the delay is ONLY in
>> starting playing IVR in early media state, once the IVR starts playing
>> everything works perfectly fine. No call fails, but this delay would be
>> annoying for anyone using the servers with over 30 CPS.
>>
>> Just to let you know, we checked everything, system resources, bandwidth
>> usage, IVR file formats etc. all seems to be fine. We even tested with
>> various FS start up options, e.g. -rp -nosql -nonat etc. etc. Nothing seems
>> to have any impact on the results.
>>
>> I have run of out of possible explanations, so calling you guys for help.
>>
>> Thank you.
>>
>>
>>
>>
>> On Fri, Jun 7, 2013 at 5:20 PM, Michael Jerris <mike at jerris.com> wrote:
>>
>>> I would need to see the specifics of your dialplan, but I suspect you
>>> have some transfers or execute extension that are causing it to re-enter
>>> dialplan.  Are you sure on all the others that they are making the exact
>>> same requests?  Details here will be necessary to understand exactly what
>>> is going on..
>>>
>>> Mike
>>>
>>> On Jun 7, 2013, at 4:07 AM, Muhammad Shahzad <shaheryarkh at gmail.com>
>>> wrote:
>>>
>>> Guy, after detailed analysis i can confirm it was an Apache issue, and
>>> changing Apache configuration changes the concurrent call limit. However,
>>> one thing i observed about xml curl is that it makes several request with
>>> same parameters per call. Even if we have no calls running on server, as
>>> well as as Apache is completely free. I can see FS makes at least
>>>
>>> 1). 3 hits for dialplan.
>>> 2). 2 hits for directory.
>>> 3). 4 hits for voicemail.
>>> 4). 3 hits for ivr.
>>> 5). 2 hits for sofia.
>>> and so on..
>>>
>>> While ideally only one hit should be sufficient to get all these
>>> configurations. What is the point of making all these redundant hits? We
>>> have roughly 15 - 20 hits made per call, which is huge and causes
>>> significant load on Apache.
>>>
>>> Both Apache and FS are running on dedicated machines and connected over
>>> Gigabit Ethernet with zero packet loss, so i doubt these hits are
>>> "re-transmission".
>>>
>>> Thank you.
>>>
>>>
>>>
>>>
>>> On Thu, Jun 6, 2013 at 1:24 AM, Muhammad Shahzad <shaheryarkh at gmail.com>wrote:
>>>
>>>> Yes, its a feature, i know. I was just looking at how this feature was
>>>> tested, as mentioned in its logs,
>>>>
>>>> 2010-01-04 15:01:51.945020 [INFO] mod_dialplan_xml.c:408 Processing
>>>> 21653XXXXX->121637XXXXX in context termination
>>>> 2010-01-04 15:01:52.054466 [ERR] mod_xml_curl.c:310 Received HTTP error
>>>> 0 trying to fetch http://192.168.0.2/gateway.php
>>>> 2010-01-04 15:01:52.054545 [CONSOLE] mod_xml_curl.c:317 XML response is
>>>> in /tmp/6632ebb1-d19f-4d51-a07e-ec2ce0387f83.tmp.xml
>>>>
>>>> Thank you.
>>>>
>>>>
>>>>
>>>>
>>>> On Thu, Jun 6, 2013 at 12:48 AM, Michael Jerris <mike at jerris.com>wrote:
>>>>
>>>>> This is adding a feature to allow timeout to be set in ms instead of
>>>>> seconds.  This is not a problem, its a feature, that was added a while ago.
>>>>>  Until you can determine if the request is being sent for the one thats
>>>>> failing, your not going to solve this issue.
>>>>>
>>>>> Mike
>>>>>
>>>>
>>>
>>> _________________________________________________________________________
>>> Professional FreeSWITCH Consulting Services:
>>> consulting at freeswitch.org
>>> http://www.freeswitchsolutions.com
>>>
>>> 
>>> 
>>>
>>> Official FreeSWITCH Sites
>>> http://www.freeswitch.org
>>> http://wiki.freeswitch.org
>>> http://www.cluecon.com
>>>
>>> FreeSWITCH-users mailing list
>>> FreeSWITCH-users at lists.freeswitch.org
>>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
>>> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
>>> http://www.freeswitch.org
>>>
>>>
>>
>>
>> --
>> Mit freundlichen Grüßen
>> Muhammad Shahzad
>> -----------------------------------
>> CISCO Rich Media Communication Specialist (CRMCS)
>> CISCO Certified Network Associate (CCNA)
>> Cell: +49 176 99 83 10 85
>> MSN: shari_786pk at hotmail.com
>> Email: shaheryarkh at googlemail.com
>>
>> _________________________________________________________________________
>> Professional FreeSWITCH Consulting Services:
>> consulting at freeswitch.org
>> http://www.freeswitchsolutions.com
>>
>> 
>> 
>>
>> Official FreeSWITCH Sites
>> http://www.freeswitch.org
>> http://wiki.freeswitch.org
>> http://www.cluecon.com
>>
>> FreeSWITCH-users mailing list
>> FreeSWITCH-users at lists.freeswitch.org
>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
>> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
>> http://www.freeswitch.org
>>
>>
>
> _________________________________________________________________________
> Professional FreeSWITCH Consulting Services:
> consulting at freeswitch.org
> http://www.freeswitchsolutions.com
>
> 
> 
>
> Official FreeSWITCH Sites
> http://www.freeswitch.org
> http://wiki.freeswitch.org
> http://www.cluecon.com
>
> FreeSWITCH-users mailing list
> FreeSWITCH-users at lists.freeswitch.org
> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
> http://www.freeswitch.org
>
>

-- 
Mit freundlichen Grüßen
Muhammad Shahzad
-----------------------------------
CISCO Rich Media Communication Specialist (CRMCS)
CISCO Certified Network Associate (CCNA)
Cell: +49 176 99 83 10 85
MSN: shari_786pk at hotmail.com
Email: shaheryarkh at googlemail.com
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.freeswitch.org/pipermail/freeswitch-users/attachments/20130612/b78b6091/attachment.html 