From owner-freebsd-questions@FreeBSD.ORG Tue Jan 21 04:33:43 2014 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id C54AE1E0 for ; Tue, 21 Jan 2014 04:33:43 +0000 (UTC) Received: from btw.pki2.com (btw.pki2.com [IPv6:2001:470:a:6fd::2]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id 938831EDB for ; Tue, 21 Jan 2014 04:33:43 +0000 (UTC) Received: from [127.0.0.1] (localhost [127.0.0.1]) by btw.pki2.com (8.14.7/8.14.5) with ESMTP id s0L4XTXc030174 for ; Mon, 20 Jan 2014 20:33:29 -0800 (PST) (envelope-from freebsd@pki2.com) Subject: confused by these mbuf stats From: Dennis Glatting To: freebsd-questions@freebsd.org Date: Mon, 20 Jan 2014 20:33:29 -0800 Message-ID: <1390278809.3668.128.camel@btw.pki2.com> Mime-Version: 1.0 X-Mailer: Evolution 2.32.1 FreeBSD GNOME Team Port X-SoftwareMunitions-MailScanner-Information: Dennis Glatting X-SoftwareMunitions-MailScanner-ID: s0L4XTXc030174 X-SoftwareMunitions-MailScanner: Found to be clean X-MailScanner-From: freebsd@pki2.com Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 7bit X-Content-Filtered-By: Mailman/MimeDel 2.1.17 X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.17 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 21 Jan 2014 04:33:43 -0000 I have a 10.0 system (r260881) with multiple applications reading data over NFS. I'm a bit confused by the stats below where 1478 requests for 9k bufs were denied yet 9k numbers (current/cache/total/max) seem to indicate that should never happen. This system is reading ~800Mb from a 1Gb ethernet. I'm a bit confused what these numbers are telling me. Can you explain? root@mc:# netstat -m 32791/18824/51615 mbufs in use (current/cache/total) 0/7136/7136/4194304 mbuf clusters in use (current/cache/total/max) 0/7130 mbuf+clusters out of packet secondary zone in use (current/cache) 6/1187/1193/2097408 4k (page size) jumbo clusters in use (current/cache/total/max) 32764/2604/35368/16779264 9k jumbo clusters in use (current/cache/total/max) 0/0/0/2097408 16k jumbo clusters in use (current/cache/total/max) 303097K/47162K/350259K bytes allocated to network (current/cache/total) 0/0/0 requests for mbufs denied (mbufs/clusters/mbuf+clusters) 0/0/0 requests for mbufs delayed (mbufs/clusters/mbuf+clusters) 0/0/0 requests for jumbo clusters delayed (4k/9k/16k) 0/1478/0 requests for jumbo clusters denied (4k/9k/16k) 0 requests for sfbufs denied 0 requests for sfbufs delayed 0 requests for I/O initiated by sendfile root@mc:#