<div>Fernando,</div><div><br></div>If I'm reading your config file right, you're asking for 8.3 million sessions of 512KB each? I think that works out to 4.3TB of RAM; rather more than the 64GB memcap.<div><br></div>
<div>Cheers,</div><div><br></div><div>Dave<br><br><div class="gmail_quote">On Fri, Nov 30, 2012 at 10:24 AM, Fernando Sclavo <span dir="ltr"><<a href="mailto:fsclavo@gmail.com" target="_blank">fsclavo@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">-----BEGIN PGP SIGNED MESSAGE-----<br>
Hash: SHA1<br>
<br>
Hello all!<br>
I'm installing an IDS on our company, monitoring two core switches with<br>
a sustained traffic of about 2gbps each. The server is a Dell R715, 32<br>
cores, 192Gb RAM with two Intel X520 nics. Suricata version is 1.4b3.<br>
The problem we are facing, is with tcp.segment_memcap_drop increasing<br>
continuosly once time tcp.reassembly_memuse reaches their max size (64gb!!)<br>
The related suricata.yaml stanza is:<br>
<br>
stream:<br>
  memcap: 24gb<br>
  checksum-validation: no      # reject wrong csums<br>
  inline: no                  # auto will use inline mode in IPS mode,<br>
yes or no set it statically<br>
  max-sessions: 8388608<br>
  prealloc-sessions: 8388608<br>
  reassembly:<br>
    memcap: 64gb<br>
    depth: 512kb                  # reassemble 1mb into a stream<br>
    toserver-chunk-size: 2560<br>
    toclient-chunk-size: 2560<br>
<br>
Thanks in advance!<br>
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</blockquote></div><br><br clear="all"><div><br></div>-- <br><div>".... We are such stuff</div><div>As dreams are made on; and our little life</div><div><div>Is rounded with a sleep."</div></div><div>-- Shakespeare, The Tempest - Act 4</div>
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