From owner-freebsd-hackers Thu Feb 7 12:42: 0 2002 Delivered-To: freebsd-hackers@freebsd.org Received: from elvis.mu.org (elvis.mu.org [192.203.228.196]) by hub.freebsd.org (Postfix) with ESMTP id 58ECB37B41D for ; Thu, 7 Feb 2002 12:41:57 -0800 (PST) Received: by elvis.mu.org (Postfix, from userid 1192) id 2B15F10DE02; Thu, 7 Feb 2002 12:41:57 -0800 (PST) Date: Thu, 7 Feb 2002 12:41:57 -0800 From: Alfred Perlstein To: Henk Wevers Cc: freebsd-hackers@freebsd.org Subject: Re: vfs.ufs.dirhash_docheck? Message-ID: <20020207124157.K3623@elvis.mu.org> References: <3C62DC57.5050703@wevers.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i In-Reply-To: <3C62DC57.5050703@wevers.org>; from henk@wevers.org on Thu, Feb 07, 2002 at 08:58:15PM +0100 Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG * Henk Wevers [020207 11:58] wrote: > Hi, > > Just to try the "thing" out i did put vfs.ufs.dirhash_docheck to 1. > My active memory use was in 30 minutes 75 MB lower, and the io is > faster, the load is lower. > The OS is FreeBSD 4.5-REL with 1250MB ram on a PIII 733, it runs 30+ > active jail() enviorements. > > What does it exactly, this hidden sysctl value? It's a debugging sysctl that is wasting cpu cycles. Turn it off, don't touch the flashing lights and keep your dirty mitts away from the big red button. -Alfred To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message