Date: Thu, 08 Oct 2009 14:45:04 +0200 From: Attila Nagy <bra@fsn.hu> To: Pawel Jakub Dawidek <pjd@FreeBSD.org> Cc: freebsd-fs@FreeBSD.org Subject: Re: ARC size constantly shrinks, then ZFS slows down extremely Message-ID: <4ACDDED0.2070707@fsn.hu> In-Reply-To: <4ACDA5EA.2010600@fsn.hu> References: <4AC1E540.9070001@fsn.hu> <4AC5B2C7.2000200@fsn.hu> <20091002184526.GA1660@garage.freebsd.pl> <4ACDA5EA.2010600@fsn.hu>
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Attila Nagy wrote: > Hello, > > Pawel Jakub Dawidek wrote: >> On Fri, Oct 02, 2009 at 09:59:03AM +0200, Attila Nagy wrote: >> >>> Backing out this change from the 8-STABLE kernel: >>> http://svn.freebsd.org/viewvc/base/head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c?r1=191901&r2=191902 >>> >>> >>> makes it survive about half and hour of IMAP searching. Of course >>> only time will tell whether this helps in the long run, but so far >>> 10/10 tries succeeded to kill the machine with this method... >>> >> >> Could you try this patch: >> >> http://people.freebsd.org/~pjd/patches/arc.c.4.patch >> > It seems (after running for two days) that this fixes my problem. And > I see that Kip has came out with a similar version (which I couldn't > yet test, but hope that will also do). It seems that I was a little bit quick regarding this. The machine just stopped with this: last pid: 32358; load averages: 0.01, 0.04, 0.12 up 2+06:33:56 14:36:25 114 processes: 1 running, 112 sleeping, 1 zombie CPU: 0.0% user, 0.0% nice, 0.0% system, 0.0% interrupt, 100% idle Mem: 536M Active, 63M Inact, 393M Wired, 8K Cache, 111M Buf Swap: 4096M Total, 15M Used, 4081M Free PID USERNAME THR PRI NICE SIZE RES STATE C TIME WCPU COMMAND 24025 root 1 44 0 3932K 992K vmwait 0 6:06 0.00% zpool 84190 root 1 44 0 4700K 1592K CPU1 1 4:17 0.00% top 99029 root 1 44 0 4132K 1212K nanslp 1 3:53 0.00% gstat 26317 root 1 44 0 1528K 352K piperd 1 3:38 0.00% readproctitl 49143 125 4 45 0 12248K 3788K sigwai 0 2:50 0.00% milter-greyl 39969 root 1 44 0 1536K 516K vmwait 0 2:50 0.00% supervise 40241 root 1 44 0 1536K 516K vmwait 0 2:47 0.00% supervise 44633 root 1 44 0 1536K 512K vmwait 0 2:43 0.00% supervise 43434 root 1 44 0 1536K 516K vmwait 0 2:43 0.00% supervise 50575 root 1 44 0 1536K 516K vmwait 0 2:42 0.00% supervise 45510 root 1 44 0 1536K 512K vmwait 0 2:42 0.00% supervise 58146 60 1 44 0 264M 8828K pfault 0 2:32 0.00% imapd 47526 389 6 44 0 92688K 2296K ucond 1 1:29 0.00% slapd 5417 root 1 44 0 9396K 1680K pfault 1 1:26 0.00% sshd 13147 root 1 44 0 3340K 860K vmwait 1 0:45 0.00% syslogd 92597 root 1 44 0 9396K 1676K pfault 1 0:39 0.00% sshd 26437 125 1 44 0 6924K 1700K vmwait 0 0:33 0.00% qmgr The above top was refreshing, but every other stuff on different ssh consoles (like a running zpool iostat and gstat) was frozen. Even top stopped when I have resized the window.
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