Date: Mon, 17 May 1999 14:03:29 -0700 (PDT) From: Doug White <dwhite@resnet.uoregon.edu> To: Justin <root@warp-9.net> Cc: questions@FreeBSD.ORG Subject: Re: hey Message-ID: <Pine.BSF.4.03.9905171401300.15052-100000@resnet.uoregon.edu> In-Reply-To: <199905161227.WAA02575@warp-9.net>
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On Sun, 16 May 1999, Justin wrote: > hey can someone please tell me how the mbuf cluster things work... > i have been reading up on them and i cant seem to find how they work/what they do > only how to increase them... mbufs are Memory Buffers, generally used by the network system to transport data between network applications and network cards. The kernel comes with a fixed number of these allocated at boot time. On heavy-use systems, it's possible to exhaust the default allocation of mbufs, causing system crashes. The kernel option NMBCLUSTERS increases the boot-time allocation. you can monitor usage of mbufs using 'netstat -m'. If the peak number comes within 2/3 of the max (or so), you may want to bump NMBCLUSTERS to handle peak traffic periods. Doug White Internet: dwhite@resnet.uoregon.edu | FreeBSD: The Power to Serve http://gladstone.uoregon.edu/~dwhite | www.freebsd.org To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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