From owner-freebsd-questions@FreeBSD.ORG Tue Nov 11 15:35:58 2008 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 7A008106568B for ; Tue, 11 Nov 2008 15:35:58 +0000 (UTC) (envelope-from eagletree@hughes.net) Received: from smtprelay.b.hostedemail.com (smtprelay0211.b.hostedemail.com [64.98.42.211]) by mx1.freebsd.org (Postfix) with ESMTP id 4CF798FC1C for ; Tue, 11 Nov 2008 15:35:58 +0000 (UTC) (envelope-from eagletree@hughes.net) Received: from filter.hostedemail.com (b-bigip1 [10.5.19.254]) by smtprelay01.b.hostedemail.com (Postfix) with SMTP id F2EEB2086D for ; Tue, 11 Nov 2008 15:35:56 +0000 (UTC) X-SpamScore: 1 X-Spam-Summary: 2, 0, 0, eca35e9fedafe708, 9510f55e4507d164, eagletree@hughes.net, freebsd-questions@freebsd.org, RULES_HIT:355:379:541:564:945:966:988:989:1260:1261:1277:1311:1313:1314:1345:1437:1515:1516:1518:1534:1541:1593:1594:1711:1730:1747:1766:1792:1801:2196:2199:2393:2559:2562:3352:3690:3865:3866:3867:3868:3869:3870:3871:3872:3874:3876:3877:4321:4385:4605:5007:6114:6119:7270:7652:7903:8501:8603:8784:9010:9038:9121:9149:9391, 0, RBL:none, CacheIP:none, Bayesian:0.5, 0.5, 0.5, Netcheck:none, DomainCache:0, MSF:not bulk, SPF:, MSBL:none, DNSBL:none Received: from [192.168.0.3] (dpc6744118153.direcpc.com [67.44.118.153]) (Authenticated sender: eagletree@hughes.net) by omf10.b.hostedemail.com (Postfix) with ESMTP for ; Tue, 11 Nov 2008 15:35:51 +0000 (UTC) Mime-Version: 1.0 (Apple Message framework v753) Content-Transfer-Encoding: 7bit Message-Id: Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed To: FreeBSD-Questions Questions From: Chris Pratt Date: Tue, 11 Nov 2008 07:35:43 -0800 X-Mailer: Apple Mail (2.753) X-session-marker: 6561676C6574726565406875676865732E6E6574 Subject: 128 Bucket Failures? X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 11 Nov 2008 15:35:58 -0000 I have asked this before a couple of years ago but received no replies. I assumed that's because it's a somewhat obscure question. I'm still interested and thought I might try again in case someone new is watching this list who might know. A vmstat -z on my highest traffic server always shows the failures as below on 128 Bucket. It also goes to having 0 free rather soon after the system is restarted and never returns to having more than 1 free in that column and yet always has the highest number of requests by far. Does this mean anything significant? Is it something I should tune or even can be tuned? Here is the output of the vmstat -z with everything chopped out besides the 128 Bucket line. The machine it's on is an 8 core 8 GB Tyan and shouldn't really be starved for anything in my way of thinking. vmstat -z ITEM SIZE LIMIT USED FREE REQUESTS FAILURES 128 Bucket: 1048, 0, 2043, 0, 13591, 6511069