Date: Wed, 30 Apr 2003 23:38:52 -0500 From: Dan Nelson <dnelson@allantgroup.com> To: "Dave [Hawk-Systems]" <dave@hawk-systems.com> Cc: freebsd-questions@freebsd.org Subject: Re: kernel: looutput: mbuf allocation failed Message-ID: <20030501043851.GE90046@dan.emsphone.com> In-Reply-To: <DBEIKNMKGOBGNDHAAKGNCEPANGAB.dave@hawk-systems.com> References: <3EB0321A.5020106@potentialtech.com> <DBEIKNMKGOBGNDHAAKGNCEPANGAB.dave@hawk-systems.com>
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In the last episode (Apr 30), Dave [Hawk-Systems] said: > >> Recently had a box go dark for a few minutes... pulled the > >following from the > >> logs shortly after the box revived itself. > >> > >> /kernel: looutput: mbuf allocation failed > >> > >> been a while since we have touched the kernel config for this > >> server... any pointers as to what settings we should lookat or > >> touch to prevent this nastiness from occuring again? > > > >What does 'netstat -m' have to say? > > nx1# netstat -m > 1045/1856/6144 mbufs in use (current/peak/max): > 977 mbufs allocated to data > 68 mbufs allocated to packet headers > 970/1536/1536 mbuf clusters in use (current/peak/max) > 3536 Kbytes allocated to network (76% of mb_map in use) > 27349 requests for memory denied > 14 requests for memory delayed > 0 calls to protocol drain routines You've already maxed out your mbuf clusters, and possibly dropped 27349 packets. Try putting "kern.ipc.nmbclusters=4096" in /boot/loader.conf and rebooting. 1536 seems really low for a web/DNS server. -- Dan Nelson dnelson@allantgroup.com
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