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<div class=Section1>

<p class=MsoNormal><span style='color:#1F497D'>Michael,<o:p></o:p></span></p>

<p class=MsoNormal><span style='color:#1F497D'><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal><span style='color:#1F497D'>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.<o:p></o:p></span></p>

<p class=MsoNormal><span style='color:#1F497D'><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal><span style='color:#1F497D'>If there are UDP packet receive
failures, would I still see those packets in my tcpdump output? &nbsp;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.<o:p></o:p></span></p>

<p class=MsoNormal><span style='color:#1F497D'><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal><span style='color:#1F497D'>Also, I have been using 1.3.1
for my tests. I did not try to use 1.2.1 yet. <o:p></o:p></span></p>

<p class=MsoNormal><span style='color:#1F497D'><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal><span style='color:#1F497D'>Thanks,<o:p></o:p></span></p>

<p class=MsoNormal><span style='color:#1F497D'><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal><span style='color:#1F497D'>Brian.<o:p></o:p></span></p>

<p class=MsoNormal><span style='color:#1F497D'><o:p>&nbsp;</o:p></span></p>

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<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Michael Young
[mailto:myoung@redmonsters.net] <br>
<b>Sent:</b> Friday, May 23, 2008 8:25 PM<br>
<b>To:</b> users@lists.openser.org<br>
<b>Subject:</b> Re: [OpenSER-Users] Openser not processing requests at rate
being sent to it<o:p></o:p></span></p>

</div>

</div>

<p class=MsoNormal><o:p>&nbsp;</o:p></p>

<p class=MsoNormal><span style='color:#1F497D'>Brian -- Have had similar
problems recently.<o:p></o:p></span></p>

<p class=MsoNormal><span style='color:#1F497D'><o:p>&nbsp;</o:p></span></p>

<p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo2'><![if !supportLists]><span
style='color:#1F497D'><span style='mso-list:Ignore'>1.<span style='font:7.0pt "Times New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span style='color:#1F497D'>Run a netstat
&#8211;su and see if you are having &#8220;packet errors&#8221;. This means the
udp buffer is filling up.<o:p></o:p></span></p>

<p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo2'><![if !supportLists]><span
style='color:#1F497D'><span style='mso-list:Ignore'>2.<span style='font:7.0pt "Times New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span style='color:#1F497D'>Check out the latest
from SVN. A patch recently implemented will honor the rev_dns=no.<o:p></o:p></span></p>

<p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo2'><![if !supportLists]><span
style='color:#1F497D'><span style='mso-list:Ignore'>3.<span style='font:7.0pt "Times New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span style='color:#1F497D'>Increase the UDP buffer
size (I used this info: <a
href="http://www.29west.com/docs/THPM/udp-buffer-sizing.html">http://www.29west.com/docs/THPM/udp-buffer-sizing.html</a>).
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.<o:p></o:p></span></p>

<p class=MsoNormal><span style='color:#1F497D'><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal><span style='color:#1F497D'>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.<o:p></o:p></span></p>

<p class=MsoNormal><span style='color:#1F497D'><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal><span style='color:#1F497D'>Michael<o:p></o:p></span></p>

<p class=MsoNormal><span style='color:#1F497D'><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal><span style='color:#1F497D'><o:p>&nbsp;</o:p></span></p>

<div>

<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>

<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
users-bounces@lists.openser.org [mailto:users-bounces@lists.openser.org] <b>On
Behalf Of </b>Brian Peters<br>
<b>Sent:</b> Friday, May 23, 2008 1:15 PM<br>
<b>To:</b> users@lists.openser.org<br>
<b>Subject:</b> [OpenSER-Users] Openser not processing requests at rate being
sent to it<o:p></o:p></span></p>

</div>

</div>

<p class=MsoNormal><o:p>&nbsp;</o:p></p>

<p class=MsoNormal>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&#8217;m sending it.<o:p></o:p></p>

<p class=MsoNormal><o:p>&nbsp;</o:p></p>

<p class=MsoNormal>Here is my configuration:<o:p></o:p></p>

<p class=MsoNormal><o:p>&nbsp;</o:p></p>

<p class=MsoNormal><o:p>&nbsp;</o:p></p>

<p class=MsoListParagraph style='text-indent:-.25in;mso-list:l1 level1 lfo4'><![if !supportLists]><span
style='mso-list:Ignore'>-<span style='font:7.0pt "Times New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span><![endif]>OpenSER 1.3.1<o:p></o:p></p>

<p class=MsoListParagraph style='text-indent:-.25in;mso-list:l1 level1 lfo4'><![if !supportLists]><span
style='mso-list:Ignore'>-<span style='font:7.0pt "Times New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span><![endif]>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.<o:p></o:p></p>

<p class=MsoListParagraph style='text-indent:-.25in;mso-list:l1 level1 lfo4'><![if !supportLists]><span
style='mso-list:Ignore'>-<span style='font:7.0pt "Times New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span><![endif]>children=16<o:p></o:p></p>

<p class=MsoListParagraph style='text-indent:-.25in;mso-list:l1 level1 lfo4'><![if !supportLists]><span
style='mso-list:Ignore'>-<span style='font:7.0pt "Times New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span><![endif]>shared memory set to 1 G. (-m 1000)<o:p></o:p></p>

<p class=MsoListParagraph style='text-indent:-.25in;mso-list:l1 level1 lfo4'><![if !supportLists]><span
style='mso-list:Ignore'>-<span style='font:7.0pt "Times New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span><![endif]>using transaction module to handle the requests.<o:p></o:p></p>

<p class=MsoListParagraph style='text-indent:-.25in;mso-list:l1 level1 lfo4'><![if !supportLists]><span
style='mso-list:Ignore'>-<span style='font:7.0pt "Times New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span><![endif]>Sending 10 INVITE requests per second to OpenSER using
Asterisk.<o:p></o:p></p>

<p class=MsoNormal><o:p>&nbsp;</o:p></p>

<p class=MsoNormal>When I do a &#8220;tcpdump&#8221; trace of the network
traffic to/from OpenSER, &nbsp;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.<o:p></o:p></p>

<p class=MsoNormal><o:p>&nbsp;</o:p></p>

<p class=MsoNormal>If I go directly from asterisk to the carrier, this test
works without any issues. I&#8217;m not sure what the limitations are of
OpenSER, but this seems like something it should be able to handle.<o:p></o:p></p>

<p class=MsoNormal><o:p>&nbsp;</o:p></p>

<p class=MsoNormal>Any help or information on how to configure OpenSER so it will
work would be appreciated.<o:p></o:p></p>

<p class=MsoNormal><o:p>&nbsp;</o:p></p>

<p class=MsoNormal>Thanks,<o:p></o:p></p>

<p class=MsoNormal><o:p>&nbsp;</o:p></p>

<p class=MsoNormal>Brian.<o:p></o:p></p>

<p class=MsoNormal><o:p>&nbsp;</o:p></p>

<p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p>&nbsp;</o:p></span></p>

<p><span style='font-size:10.0pt'>No virus found in this incoming message.<br>
Checked by AVG.<br>
Version: 7.5.524 / Virus Database: 269.24.0/1462 - Release Date: 5/23/2008 7:20
AM</span><o:p></o:p></p>

<p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p>&nbsp;</o:p></span></p>

<p><span style='font-size:10.0pt'>No virus found in this outgoing message.<br>
Checked by AVG.<br>
Version: 7.5.524 / Virus Database: 269.24.0/1462 - Release Date: 5/23/2008 7:20
AM</span><o:p></o:p></p>

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