Snort mailing list archives
Re: Performance again
From: Edin Dizdarevic <edin.dizdarevic () interActive-Systems de>
Date: Tue, 23 Dec 2003 16:55:24 +0100
Hi, The first question is anyway, what is actually ment by the statistics? It would be interessting to know, in which stages of the process a packet drop may occur and what is ment by the output/perfmon: 1. During the capture (and copy from the kernel to the user space) 2. During the preprocessing/reassembling/decoding 3. During the pattern matching/alerting 4. During the output 5. Other? AFAIK the statistics is only telling to us, what the libpcap told Snort (1.)? So how would more frequent perfmon output provide more information? So I have to take a look at the complete situation in order to guess(!), which task took so long, that Snort had to give it up and begin processing the new input. Regards, Edin Brian schrieb: [Invalid method]
Your method for coming to your conclusion is invalid. You can not ignore what happens before snort drops packets, as that is probably what is causing the drop. If you need finer grained information, set perfmonitor to dump its data more frequently. Brian
-- Edin Dizdarevic ------------------------------------------------------- This SF.net email is sponsored by: IBM Linux Tutorials. Become an expert in LINUX or just sharpen your skills. Sign up for IBM's Free Linux Tutorials. Learn everything from the bash shell to sys admin. Click now! http://ads.osdn.com/?ad_id=1278&alloc_id=3371&op=click _______________________________________________ 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:
- Performance again Edin Dizdarevic (Dec 23)
- Re: Performance again Brian (Dec 23)
- Re: Performance again Edin Dizdarevic (Dec 23)
- Re: Performance again Matt Kettler (Dec 23)
- Re: Performance again Edin Dizdarevic (Dec 23)
- Re: Performance again Matt Kettler (Dec 23)
- Re: Performance again Lawrence Reed (Dec 23)
- Re: Performance again Edin Dizdarevic (Dec 23)
- Re: Performance again Matt Kettler (Dec 23)
- Re: Performance again Edin Dizdarevic (Dec 23)
- Re: Performance again Brian (Dec 23)