Date: Fri, 18 Jul 2014 14:10:54 +0200 (CEST) From: Tommy Scheunemann <net@arrishq.net> To: freebsd-questions@freebsd.org Subject: Unexplainable behaviour after upgrading from 9.1 to 10.0 Message-ID: <alpine.BSF.2.11.1407181400560.1533@tscheunemann_bsd>
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[-- Attachment #1 --] Hello @list, back in February this year I did an upgrade from 9.1-RELEASE to 10.0-RELEASE. Recompiled all ports (of course), using the same options as before. Also the configuration is exactly the same - both of base and ports. Still since then, and following all updates up to 10.0-RELEASE-p7, the system has increasingly way more load. Example top output: last pid: 44452; load averages: 0.57, 0.46, 0.42 up 0+02:07:00 14:02:29 75 processes: 1 running, 74 sleeping CPU: 0.4% user, 0.0% nice, 0.6% system, 0.2% interrupt, 98.9% idle Mem: 691M Active, 1803M Inact, 119M Wired, 8988K Cache, 94M Buf, 138M Free Swap: 2048M Total, 15M Used, 2033M Free The OS starts swapping out processes while there's still memory available, as example Nginx (which acts as reverse proxy), php-fpm processes and a couple of other instead of just keeping them in memory. This behaviour is the same using the GENERIC kernel as well as a self-compiled one (Xen drivers removed, unused NIC drivers, VirtIO and USB support). The hardware is of course the same as before so physically nothing changed. Short after rebooting swap isn't used, though the longer the system runs the more swap is used, up to around 900 MB e.g. by swapping MySQL. The system itself is an i386 FreeBSD 10.0-RELEASE, 2 GB RAM, 2 SATA drivers using a Gmirror. The attached images show the difference in the entire system behaviour, while the traffic the webserver gets, things MySQL should do, mails Postfix sends and recieves didn't changed. Just let the webserver deliver something takes of course more time, since the process seems to run from swap. Maybe interesting the sysctl.conf.local: kern.coredump=0 kern.randompid=348 security.jail.chflags_allowed=0 security.jail.allow_raw_sockets=0 security.jail.enforce_statfs=2 security.jail.set_hostname_allowed=0 security.jail.param.persist=1 security.jail.param.securelevel=3 security.bsd.see_other_uids=0 security.bsd.see_other_gids=0 net.inet.icmp.drop_redirect=1 net.inet.ip.portrange.randomized=1 net.inet.ip.random_id=1 Which is the same as under 9.1 Anything else I can do to let the kernel stop swapping out processes without much need ? And of course if one needs more information, really no problem. Would just like to get this issue solved before moving along with 10.0 on the way more critical machines. 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