Date: Mon, 26 Jun 2006 22:44:18 +0200 From: Max Laier <max@love2party.net> To: freebsd-stable@freebsd.org Cc: Kostik Belousov <kostikbel@gmail.com>, Dmitry Morozovsky <marck@rinet.ru> Subject: Re: vmstat 'b' (disk busy?) field keeps climbing ... Message-ID: <200606262244.25505.max@love2party.net> In-Reply-To: <20060626152345.M1114@ganymede.hub.org> References: <20060624221556.O30039@woozle.rinet.ru> <20060626143038.GK79678@deviant.kiev.zoral.com.ua> <20060626152345.M1114@ganymede.hub.org>
next in thread | previous in thread | raw e-mail | index | archive | help
--nextPart2370705.8AxEAmrMA8 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline On Monday 26 June 2006 20:25, Marc G. Fournier wrote: > I think I might have found *at least* one of the problems, and that being > the excessively high blocked states while ps isn't finding anything ... > > MySQL > > We just recently started allowing clients to run a MySQL server *within* > their vServer ... in a drastic move, I just shut them all down on pluto, > and blocked drop'd from ~86 down to 5 in a matter of moments ... > restarting them all has it climbing once more, being up around 22 already > ... > > I'm going to go with that theory for now, and keep an eye on things ... > > Just curious as to why, even with -H, its not showing any blocked states > within ps though ... ? The "blocked" column shows also processes that have objects "paging". Most= =20 likely you are *short* on memory. In order to relieve the pressure=20 program .text pages are free'ed and need to be refetched from disc whenever= =20 the respective code is being executed. If you allow every vServer to run its own mySQL with all the libaries etc i= t's=20 clear what is killing you! Add more memory or make sure that .text pages c= an=20 be reused by several processes. As far as I understand vServer will all se= e=20 a different source and thus not share buffers or the like. > Thx > > On Mon, 26 Jun 2006, Kostik Belousov wrote: > > On Mon, Jun 26, 2006 at 02:20:12AM -0300, Marc G. Fournier wrote: > >> On Mon, 26 Jun 2006, Kostik Belousov wrote: > >>> Yes, this looks like a deadlock. As I understand, that's on 6.1-STABLE > >>> ? > >> > >> Yes, kernel sources, it seems, from May 25th, according to my /usr/src > >> tree ... > >> > >>> BTW, do you use snapshots ? > >> > >> Not that I've explicitly enabled ... > >> > >>> I think that without ddb access, diagnose and debug the problem would > >>> be quite hard. > >> > >> Would it be a simple matter of: > >> > >> CTL-ALT-ESC > >> panic > >> > >> to get it to dump core? Or would more be involved? Would a core dump > >> even work? > > > > Core dumps are somewhat unconvenient in this situation. Better, > > sending report to me, follow my advise in > > http://www.freebsd.org/doc/en_US.ISO8859-1/books/developers-handbook/ke= rn > >eldebug-deadlocks.html > > ---- > Marc G. Fournier Hub.Org Networking Services (http://www.hub.or= g) > Email . scrappy@hub.org MSN . scrappy@hub.org > Yahoo . yscrappy Skype: hub.org ICQ . 7615664 > _______________________________________________ > freebsd-stable@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to "freebsd-stable-unsubscribe@freebsd.org" =2D-=20 /"\ Best regards, | mlaier@freebsd.org \ / Max Laier | ICQ #67774661 X http://pf4freebsd.love2party.net/ | mlaier@EFnet / \ ASCII Ribbon Campaign | Against HTML Mail and News --nextPart2370705.8AxEAmrMA8 Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2.2 (FreeBSD) iD8DBQBEoEcpXyyEoT62BG0RAqJpAJ9/lLsU3ewtvmkBDuUaSsb8c2goBACeMm/8 +yp3mPugokzxfwzm9Y7z4mg= =QYef -----END PGP SIGNATURE----- --nextPart2370705.8AxEAmrMA8--
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200606262244.25505.max>