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

 

 

 

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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