Snort mailing list archives
Re: Pattern Matcher Performance (config detection)
From: Mike Lococo <mikelococo () gmail com>
Date: Thu, 24 Feb 2011 16:55:31 -0500
On 02/24/2011 04:30 PM, Martin Holste wrote:
Got it, that all agrees with my experiences as well. So, now I'm interested in your report that you got a 30% CPU savings with ac-nq. What is your exact config statement?
config detection: search-method ac-nq search-optimize max-pattern-len 20 The only thing that changed between these runs is the search-method. It was also running on a live-link which may display minor traffic variation, and measurements were just done by visually averaging htop bars over a few minutes. This wasn't a rigorous benchmark at all. That said, I reproduced it several times and the difference was fairly striking. Again, perfprofiling reports that >80% of the CPU time for snort is spent in the MPSE due to my very large ruleset, so I may be a fairly extreme case. Cheers, Mike Lococo ------------------------------------------------------------------------------ Free Software Download: Index, Search & Analyze Logs and other IT data in Real-Time with Splunk. Collect, index and harness all the fast moving IT data generated by your applications, servers and devices whether physical, virtual or in the cloud. Deliver compliance at lower cost and gain new business insights. http://p.sf.net/sfu/splunk-dev2dev _______________________________________________ Snort-users mailing list Snort-users () lists sourceforge net Go to this URL to change user options or unsubscribe: https://lists.sourceforge.net/lists/listinfo/snort-users Snort-users list archive: http://www.geocrawler.com/redir-sf.php3?list=snort-users
Current thread:
- Pattern Matcher Performance (config detection) Mike Lococo (Feb 24)
- Re: Pattern Matcher Performance (config detection) Alan Ptak (Feb 24)
- Re: Pattern Matcher Performance (config detection) Martin Holste (Feb 24)
- Re: Pattern Matcher Performance (config detection) Mike Lococo (Feb 24)
- Re: Pattern Matcher Performance (config detection) Martin Holste (Feb 24)
- Re: Pattern Matcher Performance (config detection) Mike Lococo (Feb 24)
- Re: Pattern Matcher Performance (config detection) Martin Holste (Feb 24)
- Re: Pattern Matcher Performance (config detection) Mike Lococo (Feb 24)
- Re: Pattern Matcher Performance (config detection) Mike Lococo (Feb 24)