From owner-freebsd-hackers  Fri Dec  6  3:29:46 2002
Delivered-To: freebsd-hackers@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP
	id 0CC6737B401; Fri,  6 Dec 2002 03:29:45 -0800 (PST)
Received: from HAL9000.homeunix.com (12-232-220-15.client.attbi.com [12.232.220.15])
	by mx1.FreeBSD.org (Postfix) with ESMTP
	id 4113443EC2; Fri,  6 Dec 2002 03:29:44 -0800 (PST)
	(envelope-from dschultz@uclink.Berkeley.EDU)
Received: from HAL9000.homeunix.com (localhost [127.0.0.1])
	by HAL9000.homeunix.com (8.12.6/8.12.5) with ESMTP id gB6BTgJt016276;
	Fri, 6 Dec 2002 03:29:42 -0800 (PST)
	(envelope-from dschultz@uclink.Berkeley.EDU)
Received: (from das@localhost)
	by HAL9000.homeunix.com (8.12.6/8.12.5/Submit) id gB6BTgk4016275;
	Fri, 6 Dec 2002 03:29:42 -0800 (PST)
	(envelope-from dschultz@uclink.Berkeley.EDU)
Date: Fri, 6 Dec 2002 03:29:42 -0800
From: David Schultz <dschultz@uclink.Berkeley.EDU>
To: Varshavchick Alexander <alex@metrocom.ru>
Cc: Terry Lambert <tlambert2@mindspring.com>,
	freebsd-questions@FreeBSD.ORG, freebsd-hackers@FreeBSD.ORG
Subject: Re: maxusers and random system freezes
Message-ID: <20021206112942.GA16222@HAL9000.homeunix.com>
Mail-Followup-To: Varshavchick Alexander <alex@metrocom.ru>,
	Terry Lambert <tlambert2@mindspring.com>,
	freebsd-questions@FreeBSD.ORG, freebsd-hackers@FreeBSD.ORG
References: <20021205135319.GA12456@HAL9000.homeunix.com> <Pine.GSO.4.33.0212051658380.7912-100000@apache.metrocom.ru>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <Pine.GSO.4.33.0212051658380.7912-100000@apache.metrocom.ru>
Sender: owner-freebsd-hackers@FreeBSD.ORG
Precedence: bulk
List-ID: <freebsd-hackers.FreeBSD.ORG>
List-Archive: <http://docs.freebsd.org/mail/> (Web Archive)
List-Help: <mailto:majordomo@FreeBSD.ORG?subject=help> (List Instructions)
List-Subscribe: <mailto:majordomo@FreeBSD.ORG?subject=subscribe%20freebsd-hackers>
List-Unsubscribe: <mailto:majordomo@FreeBSD.ORG?subject=unsubscribe%20freebsd-hackers>
X-Loop: FreeBSD.ORG

Thus spake Varshavchick Alexander <alex@metrocom.ru>:
> Thank you David for such an excellent explanation. So if sysctl reports
> 
> vm.zone_kmem_pages: 5413
> vm.zone_kmem_kvaspace: 218808320
> vm.kvm_size: 1065353216
> vm.kvm_free: 58720256
> 
> does it mean that total KVA reservation is 1065353216 bytes (1G) and
> almost all of it is really mapped to physical memory because only 58720256
> (56M) is free, and the server is balancing on the edge of crashing with
> KVA going out?

Yes, 56 MB of unreserved kernel virtual memory (modulo
fragmentation) is probably pushing it for a busy server.
Try bumping KVA_PAGES.

To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-hackers" in the body of the message