[asterisk-users] channel creation issue in ARI

Tue Jun 29 02:59:52 CDT 2021

Hi Joshua,

Thanks for your response.

I am actually trying to do performance testing of Asterisk and trying to
identify where the bottleneck is. And that is how we reached this
simplistic scenario where the “issue” is reproduced. Here, the total
channels never go beyond 200 but we are simulating a dialer application
where 50% calls are not answered (routing failures, invalid number, network
failure etc.) and hence the channel creation/destruction rate is high.

As per your comment, it seems that high rate of channel
creation/destruction might be the culprit. Our observation is that at this
high rate (~30 channel create/delete per second), a few CreateChannel
requests take more than 5 seconds while the others are served with a decent
response time of ~15ms.

Is there a known limit for how much channel creation rate Asterisk can
support? It will help me in debugging my configuration. Do you think the
queue might be building up in Asterisk as the Stassis application tries to
send responses/events to the ARI application?

I couldn’t find much material on pointers to debug this kind of
configuration and any pointers to literature of any kind is much
appreciated.

Thanks

Tejveer Sharma

On Fri, Jun 25, 2021 at 6:02 PM Tejveer Sharma <sharmatejveer85 at gmail.com>
wrote:

>
> Forwarded Conversation
> Subject: channel creation issue in ARI
> ------------------------
>
> From: Tejveer Sharma <sharmatejveer85 at gmail.com>
> Date: Fri, Jun 25, 2021 at 10:27 AM
> To: <asterisk-users at lists.digium.com>
>
>
> Hi Team,
>
> We tried to run 200 channels parallel for  2 hour and found that in
> some cases (very frequently), "create channel  rest api"  takes more than 5
> seconds to respond. Which causes a queue at the application end. What is
> the reason for that behaviour?
>
> Environment:
>
> VM Configurations
> Operating System : CentOS Linux release 7.9.2009
> CPU : 8 core
> Memory : 16 GB ram
> Application : Java
>
> Thanks
> Tejveer Sharma
>
>
>
> ----------
> From: Joshua C. Colp <jcolp at sangoma.com>
> Date: Fri, Jun 25, 2021 at 2:13 PM
> To: Asterisk Users Mailing List - Non-Commercial Discussion <
> asterisk-users at lists.digium.com>
>
>
> On Fri, Jun 25, 2021 at 1:54 AM Tejveer Sharma <sharmatejveer85 at gmail.com>
> wrote:
>
>> Hi Team,
>>
>> We tried to run 200 channels parallel for  2 hour and found that in
>> some cases (very frequently), "create channel  rest api"  takes more than 5
>> seconds to respond. Which causes a queue at the application end. What is
>> the reason for that behaviour?
>>
>
> Define "200 channels parallel". How many are you creating at once? There
> are things which inherently make things non-parallelize during certain
> operations, such as channel creation.
>
> --
> Joshua C. Colp
> Asterisk Technical Lead
> Sangoma Technologies
> Check us out at www.sangoma.com and www.asterisk.org
> --
> _____________________________________________________________________
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> ----------
> From: Tejveer Sharma <sharmatejveer85 at gmail.com>
> Date: Fri, Jun 25, 2021 at 5:24 PM
> To: Asterisk Users Mailing List - Non-Commercial Discussion <
> asterisk-users at lists.digium.com>
>
>
> Hi Joshua C. Colp,
>
> We try to run load through our java application , In which we create a
> channel and make an outbound call (using SIPPI client for testing), after
> the call answer a prompt is played and then execute the disconnect channel
> . This all takes almost 10-15 seconds. Application makes sure not more than
> 200 outbound calls will be in the system at any given time. In the starting
> channel creation is quite fast but over some period of time it got stable.
> Even in stable scenario channel creation rest api calls using ARI take
> almost 5 to 6 seconds to create a channel and return back channel id.
>
> Thanks
> Tejveer Sharma
>
>
> ----------
> From: Joshua C. Colp <jcolp at sangoma.com>
> Date: Fri, Jun 25, 2021 at 5:25 PM
> To: Asterisk Users Mailing List - Non-Commercial Discussion <
> asterisk-users at lists.digium.com>
>
>
> On Fri, Jun 25, 2021 at 8:52 AM Tejveer Sharma <sharmatejveer85 at gmail.com>
> wrote:
>
>> Hi Joshua C. Colp,
>>
>> We try to run load through our java application , In which we create a
>> channel and make an outbound call (using SIPPI client for testing), after
>> the call answer a prompt is played and then execute the disconnect channel
>> . This all takes almost 10-15 seconds. Application makes sure not more than
>> 200 outbound calls will be in the system at any given time. In the starting
>> channel creation is quite fast but over some period of time it got stable.
>> Even in stable scenario channel creation rest api calls using ARI take
>> almost 5 to 6 seconds to create a channel and return back channel id.
>>
>
> That's not really sufficient, still. What does "try to run load" mean? How
> many simultaneous calls are you trying to create? How many are hanging up
> at the same time? Are these all in the same application? Is the application
> reusing the same HTTP connection so requests have to wait as well?
>
> --
> Joshua C. Colp
> Asterisk Technical Lead
> Sangoma Technologies
> Check us out at www.sangoma.com and www.asterisk.org
>
>
> ----------
> From: Tejveer Sharma <sharmatejveer85 at gmail.com>
> Date: Fri, Jun 25, 2021 at 5:43 PM
> To: Asterisk Users Mailing List - Non-Commercial Discussion <
> asterisk-users at lists.digium.com>
>
>
> 200  simultaneous calls we are trying to create . There is a single
> application. We have a Http connection pool for connectivity.
> 50 channels are hanging up and 50 channels creation happens at the same
> time.
>
> Thanks
> Tejveer Sharma
>
>
> ----------
> From: Joshua C. Colp <jcolp at sangoma.com>
> Date: Fri, Jun 25, 2021 at 5:42 PM
> To: Asterisk Users Mailing List - Non-Commercial Discussion <
> asterisk-users at lists.digium.com>
>
>
> On Fri, Jun 25, 2021 at 9:10 AM Tejveer Sharma <sharmatejveer85 at gmail.com>
> wrote:
>
>> 200  simultaneous calls we are trying to create . There is a single
>> application. We have a Http connection pool for connectivity.
>> 50 channels are hanging up and 50 channels creation happens at the same
>> time.
>>
>
> There would be a bottleneck somewhere there, as channels are being
> destroyed/created near the same time. You'd need to do performance testing
> of Asterisk and isolate specific areas for your usage.
>
> --
> Joshua C. Colp
> Asterisk Technical Lead
> Sangoma Technologies
> Check us out at www.sangoma.com and www.asterisk.org
>
>
>
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