Date: Sat, 11 Nov 2006 13:22:51 -0500 From: Kris Kennaway <kris@obsecurity.org> To: Zbigniew Szalbot <zbyszek@szalbot.homedns.org> Cc: freebsd-questions@freebsd.org, Kris Kennaway <kris@obsecurity.org> Subject: Re: periodic, short freezes Message-ID: <20061111182251.GB6739@xor.obsecurity.org> In-Reply-To: <Pine.BSF.4.64.0611110933520.67555@192.168.11.51> References: <Pine.BSF.4.64.0611090907440.9485@192.168.11.51> <20061109192407.GA43267@xor.obsecurity.org> <Pine.BSF.4.64.0611092255160.39407@192.168.11.51> <20061109220926.GA45759@xor.obsecurity.org> <Pine.BSF.4.64.0611092327310.41783@192.168.11.51> <20061109235515.GA46945@xor.obsecurity.org> <Pine.BSF.4.64.0611101016220.96922@192.168.11.51> <20061111063313.GB81772@xor.obsecurity.org> <Pine.BSF.4.64.0611110933520.67555@192.168.11.51>
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--kORqDWCi7qDJ0mEj Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Sat, Nov 11, 2006 at 09:36:25AM +0100, Zbigniew Szalbot wrote: > Hello, >=20 > On Sat, 11 Nov 2006, Kris Kennaway wrote: >=20 > >The fact that swap is in use, together with your description, > >indicates that your system is overloaded; those transient loads are > >causing it to periodically demand more working memory than is backed > >by RAM, so the system goes into a frenzy of swapping trying to > >accomodate, and system performance falls in the toilet until the load > >goes away. > > > >Add more RAM or limit the workload. >=20 > Now that something to check - thank you very much Kris. Is that so that o= n=20 > a typical system with enough memory to do its job there is no swap use on= =20 > average? From what I can tell swap is always used to some extent but I=20 > have checked another system and swap use there is 0%. So you may be right= =20 > that this is the problem. There should be no significant swap use, although there might be a small amount (a few MB) in use. Certainly it should not change over time, because that indicates that the system needed to reshuffle things. Kris --kORqDWCi7qDJ0mEj Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (FreeBSD) iD8DBQFFVhT7Wry0BWjoQKURAkkcAKDZ5n6cw7o09Sy/eFZNioCva6G9SQCeI/aG /42eu7FRet/UEfcEsYsXG40= =/iiO -----END PGP SIGNATURE----- --kORqDWCi7qDJ0mEj--
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