Date: Sun, 16 Nov 1997 00:00:06 -0800 From: David Greenman <dg@root.com> To: Jeong Seong Won <swjeong@woman.kitel.co.kr> Cc: freebsd-questions@FreeBSD.ORG Subject: Re: Network connection often stops. Why ? Message-ID: <199711160800.AAA12641@implode.root.com> In-Reply-To: Your message of "Sun, 16 Nov 1997 01:02:36 %2B0900." <346DC79C.41C67EA6@woman.kitel.co.kr>
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>In my company. About twenty of 686 FreeBSD 2.2.1 Machine is connected > via FastEthernet.(Intel EtherExpress) > Hub is SMC tigerstack.(not a switching) > Problem occurs in the same way when I used SMC 9332BDT. > Network options MAXMEM=262144 > Concurrent User is aboue 230 per machine. > > Problem is that suddenly telnet session stop. > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > When this happens, all key stokes is not effective, and at last > conection is closed. > > vnode, file table, mbuf, somaxconn is sufficient. > > kernel configuration is > >.... > >options MAXMEM=262144 >maxusers 250 >options NMBCLUSTERS=8192 >options CHILD_MAX=3500 >options "FD_SETSIZE=2048" > >..... I just replied to your message in the NetBSD list as well. I think the problem is that you are running out of mbuf clusters (even though you have the setting really high already). Can you monitor that with "netstat -m" and make sure that the second figure in the ratio of mbuf clusters in use is never more than 6000? -DG David Greenman Core-team/Principal Architect, The FreeBSD Project
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