From owner-freebsd-amd64@FreeBSD.ORG Mon Nov 28 20:47:54 2005 Return-Path: X-Original-To: freebsd-amd64@freebsd.org Delivered-To: freebsd-amd64@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 85B4416A41F for ; Mon, 28 Nov 2005 20:47:54 +0000 (GMT) (envelope-from kris@obsecurity.org) Received: from elvis.mu.org (elvis.mu.org [192.203.228.196]) by mx1.FreeBSD.org (Postfix) with ESMTP id 40CF243D46 for ; Mon, 28 Nov 2005 20:47:54 +0000 (GMT) (envelope-from kris@obsecurity.org) Received: from obsecurity.dyndns.org (elvis.mu.org [192.203.228.196]) by elvis.mu.org (Postfix) with ESMTP id E180A1A3C28; Mon, 28 Nov 2005 12:47:51 -0800 (PST) Received: by obsecurity.dyndns.org (Postfix, from userid 1000) id 50C315158D; Mon, 28 Nov 2005 15:47:51 -0500 (EST) Date: Mon, 28 Nov 2005 15:47:51 -0500 From: Kris Kennaway To: Vivek Khera Message-ID: <20051128204751.GB28393@xor.obsecurity.org> References: <9050D228-231F-415C-8F5C-FBF5AE4BACE8@khera.org> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="s2ZSL+KKDSLx8OML" Content-Disposition: inline In-Reply-To: <9050D228-231F-415C-8F5C-FBF5AE4BACE8@khera.org> User-Agent: Mutt/1.4.2.1i Cc: freebsd-amd64 List Subject: Re: increasing PMAP_SHPGPERPROC (was: FreeBSD 5.4 or 6.0 as postgresql-server) X-BeenThere: freebsd-amd64@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Porting FreeBSD to the AMD64 platform List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 28 Nov 2005 20:47:54 -0000 --s2ZSL+KKDSLx8OML Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Mon, Nov 28, 2005 at 01:29:35PM -0500, Vivek Khera wrote: >=20 > On Nov 28, 2005, at 1:09 PM, Claus Guttesen wrote: >=20 > >kernel: collecting pv entries -- suggest increasing PMAP_SHPGPERPROC >=20 > I've never been able to get good advice on how to tune this =20 > parameter. I believe on one box I just upped it by 50 from the =20 > default (back in 4.x days) and stopped getting them. In my experience it's usually best to make fractional changes like this when tuning a parameter, since the defaults are usually nearly good enough, and it's pretty hard to generate a workload that will blow them out by a large amount. Kris --s2ZSL+KKDSLx8OML Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2 (FreeBSD) iD8DBQFDi2z2Wry0BWjoQKURAgl4AKCblMULJNVwCiUEpt+OBrlURq7YZwCg/xRo 8mi3yCIs8qbh1e2bKGd7DK4= =yccM -----END PGP SIGNATURE----- --s2ZSL+KKDSLx8OML--