Date: Sun, 22 Aug 1999 04:23:37 -0500 (CDT) From: Igor Roshchin <igor@physics.uiuc.edu> To: igor@alecto.physics.uiuc.edu (Igor Roshchin) Cc: stable@freebsd.org Subject: Re: rx list ??? Message-ID: <199908220923.EAA13252@alecto.physics.uiuc.edu> In-Reply-To: <199908220545.AAA11248@alecto.physics.uiuc.edu> from "Igor Roshchin" at "Aug 22, 1999 0:45:48 am"
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Thanks to everybody replied! netstat -m cleared it up. It looks like the formula for calculating NMBCVLUSTERS from MAXUSERS just didn't work for me for some strange extreme situation (It happened for the first time after ~2.5 years of server running) So, I just set in opt_param.h the line: #define NMBCLUSTERS 8192 Igor > Hello! > > > I found the following messages (so far just once) on a server that is running > web-server (apache), and an ftp server. > > This is 3.1-19990412-STABLE with a custom-built kernel with > maxusers set to 128, > running on a PPRO-180 with 128MB of RAM and ~260MB of swap space. > > > Aug 21 16:00:29 <kern.crit> HOST /kernel: Out of mbuf clusters - adjust NMBCL > USTERS or increase maxusers! > Aug 21 16:00:29 <kern.crit> HOST /kernel: xl0: no memory for rx list -- packe > t dropped! > Aug 21 16:00:43 <kern.crit> HOST last message repeated 1354 times > > I don't see anything in the logs that would indicate an extraodinary load , > however, it looks like neither of the servers logged anything > between 16:00:29 and 16:00:41 > > I wonder, whether it is possible that this is due some type of a DOS attack. > > Also, what can be done ? > I am not certain if boosting the value of maxusers up would be > a wise solution. > > Any thoughts are appreciated. > > Igor > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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