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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">I’ve post this earlier and hope that this can be useful.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoPlainText">If you are using AF-PACKET (and why wouldn't you), the attached spreadsheet may help. It is derived from Peter Manev's highly detailed review of various configuration options and their affect on memory utilization.
<a href="http://pevma.blogspot.com/2015/10/suricata-with-afpacket-memory-of-it-all.html">
http://pevma.blogspot.com/2015/10/suricata-with-afpacket-memory-of-it-all.html</a><o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">I began creating this during a Suricata training class so I could save time when testing different configurations. Peter has reviewed it for accuracy and correct nomenclature. I hope that it will be of some use to the community.<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">Sean Cloherty <o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Oisf-users [mailto:oisf-users-bounces@lists.openinfosecfoundation.org]
<b>On Behalf Of </b>erik clark<br>
<b>Sent:</b> Thursday, July 13, 2017 07:58 AM<br>
<b>To:</b> Open Information Security Foundation <oisf-users@lists.openinfosecfoundation.org><br>
<b>Subject:</b> Re: [Oisf-users] SEPTun and memory usage<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">All, trying to find out who has worked with the SEPTun document that can provide some insight into how much memory they are using to sniff traffic.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">We (were) using 8 threads with 200 gigs of ram on a 2.5 Gb/s link. Until earlier this week, our drop rate was ~2%. I just moved up to 16 threads, still at 200 gigs of ram, since our throughput moved up a bit to ~3.1Gb/s and saw a 12% drop
rate.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">We have 72 cores to work with, and 200 gigs of ram, and just moved to a 4.4 kernel from a modified 3.10 kernel. What seems reasonable on this kind of hardware? We are limited to an 82598 ixgbe interface with a single link.<o:p></o:p></p>
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