From owner-freebsd-hackers@FreeBSD.ORG Fri May 23 12:07:58 2003 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 2909B37B401 for ; Fri, 23 May 2003 12:07:58 -0700 (PDT) Received: from manor.msen.com (manor.msen.com [148.59.4.66]) by mx1.FreeBSD.org (Postfix) with ESMTP id 6381F43FD7 for ; Fri, 23 May 2003 12:07:57 -0700 (PDT) (envelope-from wayne@staff.msen.com) Received: from manor.msen.com (wayne@localhost [127.0.0.1]) by manor.msen.com (8.12.7M/8.12.7) with ESMTP id h4NJ7ubu089890 for ; Fri, 23 May 2003 15:07:56 -0400 (EDT) Message-Id: <200305231907.h4NJ7ubu089890@manor.msen.com> To: freebsd-hackers@FreeBSD.ORG Date: Fri, 23 May 2003 15:07:56 -0400 From: "Michael R. Wayne" Subject: mbuf reference? (and missing man page) X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 23 May 2003 19:07:58 -0000 Missing man page: 4.8 releasse - man netstat has a reference to mbuf(9) but man mbuf says: No manual entry for mbuf Real question: I'm seeking some additional documentation on the relationship between mbufs, mbuf clusters and network memory usage (essentially the output of netstat -m). Obviously, the number of mbuf clusters is tunable with kern.ipc.nmbclusters. The maximum number of mbufs appears to be 4 * that number (or is that 4 a tunable?) Not sure how network memory allocation is chosen (% of base memory size as default?) and, does it grow dynamically or should one be building a new kernel once, say, 80% of the mb_map is in use? Or simply ignore occasional high mb_map utilization unless requests for memorey are delayed/denied? /\/\ \/\/