Date: Sun, 21 Jan 2007 02:29:22 -0500 From: Kris Kennaway <kris@obsecurity.org> To: Rich Winkel <rich@math.missouri.edu> Cc: freebsd-questions@freebsd.org Subject: Re: Mail server intermittent freeze Message-ID: <20070121072922.GA16776@xor.obsecurity.org> In-Reply-To: <200701210156.l0L1u8JA050864@pencil.math.missouri.edu> References: <200701210156.l0L1u8JA050864@pencil.math.missouri.edu>
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--SUOF0GtieIMvvwua Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Sat, Jan 20, 2007 at 07:56:08PM -0600, Rich Winkel wrote: > I'm pulling out what's left of my hair trying to figure out this one. > It's not a pretty sight. Save the people who have to look at me! >=20 > It's a 1ghz intel P3 with 512MB ram, running 4.11-p26 with sendmail, > imapd-uw, qpopper, stunnel-4.14_2 and p5-Mail-SpamAssassin-3.1.1, as > well as tty logins. > It's an nis and nfs client (nfs=3Dhome dirs). It has an fxp network card > which is in polling mode (although the problem started before it was put > in polling mode) >=20 > The system will freeze maybe every 5 minutes, sometimes for up to > a minute. Almost completely: low level terminal io on the console > still works. I can switch tty's (ALT-Fn) and carriage returns > are echoed (and discarded) while showing "netstat -w 1" output. > But interactive prompts are frozen. No user-level processing is > apparent. Network traffic is heavy, we're getting massive amounts > of spam, and spamd's load on the system has jumped considerably > in the past few weeks. Average system load used to hover around .8, > now it averages over 2, mostly due to spamd. Usually this is because a transient load is causing it to swap. 512MB isn't really a lot of RAM on a heavily loaded server. Kris --SUOF0GtieIMvvwua Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (FreeBSD) iD8DBQFFsxZRWry0BWjoQKURAl1/AKD6ci/at8BGUwSVQBBcN7tCUd5LvQCZAdxQ 887wMIoFj/oU98evdt9HXmE= =7+pQ -----END PGP SIGNATURE----- --SUOF0GtieIMvvwua--
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