From owner-freebsd-questions Tue Jan 2 15:26:16 2001 From owner-freebsd-questions@FreeBSD.ORG Tue Jan 2 15:26:15 2001 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from shell.webmaster.com (unknown [216.152.64.152]) by hub.freebsd.org (Postfix) with ESMTP id 11D2237B400 for ; Tue, 2 Jan 2001 15:26:11 -0800 (PST) Received: from whenever ([216.152.68.2]) by shell.webmaster.com (Post.Office MTA v3.5.3 release 223 ID# 0-12345L500S10000V35) with SMTP id com for ; Tue, 2 Jan 2001 15:25:55 -0800 From: "David Schwartz" To: Subject: Processes stuck in 'nbufbs', what should be tuned? Date: Tue, 2 Jan 2001 15:26:09 -0800 Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2911.0) Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4133.2400 Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG One of my FreeBSD-stable machines (4.2-STABLE, Dec 12) seems to get into a state where its performance drops to near-zero. I've raised MAXUSERS and NMBCLUSTERS. According to 'netstat -m', it's not an mbuf issue. Swap isn't touched, so it's not a memory issue. But I do see some processes blocked in 'nbufbs'. I've tried to look at the code in vfs_bio.c to see what 'nbufbs' means, but I can't quite make sense of it. Is there something I should tune? If it helps, the machine is running multithreaded network servers (using the LinuxThreads port). The machine also has an AMI MegaRAID. DS To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message