Date: Wed, 19 Nov 2008 11:43:09 +0100 From: Ivan Voras <ivoras@freebsd.org> To: freebsd-stable@freebsd.org Subject: Re: High system in %system load . Message-ID: <gg0qi7$v7n$1@ger.gmane.org> In-Reply-To: <fd2a4c1f0811180904k396dff47m43d537a07ae87579@mail.gmail.com> References: <fd2a4c1f0811180637m6ee44d4fv4cf97d18e322ca5a@mail.gmail.com> <gfun0o$lvq$1@ger.gmane.org> <fd2a4c1f0811180904k396dff47m43d537a07ae87579@mail.gmail.com>
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This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enig6B3D92DE5DE51AF6DA33F1D7 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Igor Lyapin wrote: > I already sent # top head in my first mail > that's all non idle top process >=20 > last pid: 56920; load averages: 2.90, 2.25, 1.72 up= > 0+22:10:12 20:04:05 > 210 processes: 2 running, 207 sleeping, 1 zombie > CPU states: 8.3% user, 0.0% nice, 32.5% system, 0.3% interrupt, 58.9= % > idle > Mem: 1268M Active, 1904M Inact, 479M Wired, 154M Cache, 214M Buf, 125M = Free > Swap: 8192M Total, 8192M Free >=20 > PID USERNAME THR PRI NICE SIZE RES STATE C TIME WCPU > COMMAND > 55546 www 1 -4 0 198M 24912K ufs 1 0:25 29.39% = httpd > 55986 www 1 -4 0 198M 23228K ufs 2 0:08 21.39% = httpd > 56030 www 1 -4 0 199M 23400K ufs 1 0:05 11.23% = httpd Ok, high sys load in "ufs" state for me was often caused by PHP session storage. By default, PHP will store all session records in a single directory, which can grow to monstruous sizes. If this is also your case, here are some things to try: a) increase vfs.ufs.dirhash_maxmem to 10 MB or something like that (look at vfs.ufs.dirhash_mem to see if you're hitting the limit and if so, monitor it to see what your dirhash_maxmem limit should be) b) configure PHP to use "sharded" directory structure for sessions. --------------enig6B3D92DE5DE51AF6DA33F1D7 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFJI+29ldnAQVacBcgRApC1AJ4nm+ZhR++M+H14SFkidstXOO0bnwCeKQck x5KiLg8QZctkSNc98fKJH5k= =tBBi -----END PGP SIGNATURE----- --------------enig6B3D92DE5DE51AF6DA33F1D7--
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