Date: Mon, 28 Nov 2005 15:47:51 -0500 From: Kris Kennaway <kris@obsecurity.org> To: Vivek Khera <vivek@khera.org> Cc: freebsd-amd64 List <freebsd-amd64@freebsd.org> Subject: Re: increasing PMAP_SHPGPERPROC (was: FreeBSD 5.4 or 6.0 as postgresql-server) Message-ID: <20051128204751.GB28393@xor.obsecurity.org> In-Reply-To: <9050D228-231F-415C-8F5C-FBF5AE4BACE8@khera.org> References: <b41c75520511281009j4ce6b29bh@mail.gmail.com> <9050D228-231F-415C-8F5C-FBF5AE4BACE8@khera.org>
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[-- Attachment #1 --] On Mon, Nov 28, 2005 at 01:29:35PM -0500, Vivek Khera wrote: > > On Nov 28, 2005, at 1:09 PM, Claus Guttesen wrote: > > >kernel: collecting pv entries -- suggest increasing PMAP_SHPGPERPROC > > I've never been able to get good advice on how to tune this > parameter. I believe on one box I just upped it by 50 from the > 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 [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2 (FreeBSD) iD8DBQFDi2z2Wry0BWjoQKURAgl4AKCblMULJNVwCiUEpt+OBrlURq7YZwCg/xRo 8mi3yCIs8qbh1e2bKGd7DK4= =yccM -----END PGP SIGNATURE-----home | help
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