[OpenSER-Users] Openser not processing requests at rate being sent to it

[Brian Peters]

Michael,

 

Thanks for the suggestion of the UDP buffer size. I pushed it to 8M, but
there was no change in the behavior. I am still getting 20% of the calls
fail because of OpenSER not processing the messages. Some calls are going
through, but there are many that take several re-sends from Asterisk before
they get processed by OpenSER.

 

If there are UDP packet receive failures, would I still see those packets in
my tcpdump output?  In my tests, I see the INVITE requests in my tcpdump
log, but they simply never appear to be handled by OpenSER in a timely
manner.

 

Also, I have been using 1.3.1 for my tests. I did not try to use 1.2.1 yet. 

 

Thanks,

 

Brian.

 

From: Michael Young [mailto:myoung at redmonsters.net] 
Sent: Friday, May 23, 2008 8:25 PM
To: users at lists.openser.org
Subject: Re: [OpenSER-Users] Openser not processing requests at rate being
sent to it

 

Brian -- Have had similar problems recently.

 

1.       Run a netstat -su and see if you are having "packet errors". This
means the udp buffer is filling up.

2.       Check out the latest from SVN. A patch recently implemented will
honor the rev_dns=no.

3.       Increase the UDP buffer size (I used this info:
http://www.29west.com/docs/THPM/udp-buffer-sizing.html). Mine is set to 1 Mb
right now, and is now able to handle 10 invites per second. Before making
these changes I was dying at 3 per second.

 

I posted a message earlier this week, that said that my OpenSER install is
not correctly calculating the buffer size as far as I can tell, but have not
gotten a response on that yet. Performance is still not as good as previous
OpenSER versions with this setup (we have a 1.2.1 server that is running
circles around the three 1.3.2 servers). I am using dbaliases to route calls
on the 1.3.2 servers, and ENUM on the 1.2.1 server, but that is the only
difference, and I would not expect that to make this great of a difference.

 

Michael

 

 

From: users-bounces at lists.openser.org
[mailto:users-bounces at lists.openser.org] On Behalf Of Brian Peters
Sent: Friday, May 23, 2008 1:15 PM
To: users at lists.openser.org
Subject: [OpenSER-Users] Openser not processing requests at rate being sent
to it

 

I am doing what I thought was a simple volume test that OpenSER should be
able to handle, but the results I am getting so far show it is not handling
the load I'm sending it.

 

Here is my configuration:

 

 

-          OpenSER 1.3.1

-          Simple script that uses OpenSER as a proxy to forward requests to
a carrier. All it does is rewrite the host and port of the R-URI and relays
to the carrier.

-          children=16

-          shared memory set to 1 G. (-m 1000)

-          using transaction module to handle the requests.

-          Sending 10 INVITE requests per second to OpenSER using Asterisk.

 

When I do a "tcpdump" trace of the network traffic to/from OpenSER,  it is
clear that a large percentage of the INVITE requests sent to OpenSER were
not handled. Asterisk needed to resend the INVITE requests several times
before OpenSER would handle them, and in about 20% of the cases Asterisk
terminated the INVITES because it reached the timeout of 30 seconds without
any response.

 

If I go directly from asterisk to the carrier, this test works without any
issues. I'm not sure what the limitations are of OpenSER, but this seems
like something it should be able to handle.

 

Any help or information on how to configure OpenSER so it will work would be
appreciated.

 

Thanks,

 

Brian.

 

 

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