Date: Tue, 22 Nov 2016 07:08:11 +0000 From: James Morris <jamesmorris8@outlook.com> To: freebsd-fs <freebsd-fs@FreeBSD.org> Subject: Unresponsive system, ZFS ARK forcing proceses into swap Message-ID: <BM1PR01MB02092F7FEF86A6CF73DC47898CB40@BM1PR01MB0209.INDPRD01.PROD.OUTLOOK.COM>
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Hi, I have a freebsd 10.3 zfs server running with multiple zfs jails. I run samba, syslog-ng, a web server and a few assorted other services in e= ach jail. The machine is not used much, but I have noticed that I can not ssh into th= e base system or reach a web server that I run on the base system after a f= ew days of running. On connecting via the console I notice that arc is taking up a bulk of the = ram and it seems processes like sshd and nginx are frozen. Also the swap space is utilised and the ARC is taking up the majority of my= RAM. When I try and run an interactive command like top, less, ... It loads, but= the system takes exceedingly long 10min+ to close these. The same symptoms are true when I try to use ^c to quit a running process l= ike ping. Any help triaging this issue will be much appreciated. I believe that the ZFS ARC has something to do with it, but I do not want t= o turn it off altogether. Is there a way to make sure ZFS does not push my other processes (sshd, ngi= nx, ...) into swap where they are unresponsive. Output of top while in this state is below last pid: 31465; load averages: 0.43, 0.56, 0.54 up 1+08:18:48 13:5= 9:44 319 processes: 1 running, 308 sleeping, 1 stopped, 3 zombie, 6 waiting Mem: 82M Active, 336K Inact, 15G Wired, 76M Cache, 12M Free ARC: 12G Total, 3503M MFU, 26M MRU, 13M Anon, 22M Header, 8572M Other Swap: 2048M Total, 1064M Used, 984M Free, 51% Inuse Thanks in advance, James=
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