From owner-freebsd-questions@FreeBSD.ORG Mon Jun 28 19:06:54 2004 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id E3B5C16A4CE for ; Mon, 28 Jun 2004 19:06:54 +0000 (GMT) Received: from web21122.mail.yahoo.com (web21122.mail.yahoo.com [216.136.227.178]) by mx1.FreeBSD.org (Postfix) with SMTP id A5D3C43D45 for ; Mon, 28 Jun 2004 19:06:54 +0000 (GMT) (envelope-from materribile@yahoo.com) Message-ID: <20040628190654.96737.qmail@web21122.mail.yahoo.com> Received: from [24.228.74.10] by web21122.mail.yahoo.com via HTTP; Mon, 28 Jun 2004 12:06:54 PDT Date: Mon, 28 Jun 2004 12:06:54 -0700 (PDT) From: Mark Terribile To: freebsd-questions@freebsd.org In-Reply-To: <20040628163203.374C216A4E7@hub.freebsd.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Subject: Re: Maximum uptime 497 days? X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 28 Jun 2004 19:06:55 -0000 [Coming in late ...] > On Mon, Jun 28, 2004 at 05:19:10PM +0400, Maxim Konovalov wrote: > > On Mon, 28 Jun 2004, 12:39+0900, Rob wrote: > > > By accident I happen to come across this remarkable limit of > > > uptime registration for FreeBSD systems. After 497 days, the > > > timer jumps to zero again. > > > > > > 497 days is less than a 1.5 years ! > > > > > > Has this been fixed in newer versions of FreeBSD (stable and/or > > > current) ? Or is there a hardware limitation (CPU?) that does > > > not allow this? Most system management/statistical things are built around the MIB (Management Information Base) concept used by SNMP, etc. These call for time to be kept in 10,000ths of a second in a 32-bit unsigned counter. That register rolls over in about 497 days. (Later versions of the base MIB add 64-bit counters, but support isn't universal and software designs tend to prefer the original counters.) Mark Terribile __________________________________ Do you Yahoo!? New and Improved Yahoo! Mail - Send 10MB messages! http://promotions.yahoo.com/new_mail