Date: Mon, 22 Oct 2012 15:56:58 +0200 From: Andre Oppermann <andre@freebsd.org> To: Vladislav Prodan <universite@ukr.net> Cc: freebsd-current@freebsd.org, freebsd-stable@freebsd.org Subject: Re: [ZFS] Server periodically become unavailable Message-ID: <508550AA.5080106@freebsd.org> In-Reply-To: <86879.1350738692.82582785788739584@ffe8.ukr.net> References: <86879.1350738692.82582785788739584@ffe8.ukr.net>
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On 20.10.2012 15:11, Vladislav Prodan wrote: > >> FreeBSD 9.1-PRERELEASE #0: Wed Jul 25 01:40:56 EEST 2012 > > I have the server: 8 cores AMD, 16GB RAM, 4x3TB HDD in RAID10 for ZFS. > Sometime wheels fall off the server and the network. > Can this clean-up memory for ZFS cache? > I enclose a picture with the monitoring system at the time lags. > > http://imageshack.us/a/img341/9643/memoryusage.png > http://imageshack.us/a/img22/6935/nginxclientstat.png > http://imageshack.us/a/img19/8817/realmemory.png > > #cat /etc/sysctl.conf > kern.ipc.somaxconn=65535 Remove this. It doesn't do what you think it does. > kern.ipc.maxsockets=204800 > net.inet.ip.portrange.first=1024 > net.inet.ip.portrange.last=65535 > kern.ipc.shmmax=67108864 > kern.ipc.shmall=67108864 > net.inet.tcp.rfc3465=0 Any particular reason why you turn this off? > net.graph.maxdgram=8388608 > net.graph.recvspace=8388608 > net.route.netisr_maxqlen=4096 > kern.ipc.nmbclusters=400000 > kern.ipc.maxsockbuf=83886080 83MB for a socket buffer is too much unless you're doing some HPC stuff. The default should be fine. > net.inet.tcp.recvbuf_inc=524288 Again, this should be left at default unless you have a very specific reason to increment it. > net.inet.tcp.recvbuf_max=16777216 ditto. > net.inet.tcp.sendbuf_inc=524288 ditto. > net.inet.tcp.sendbuf_max=16777216 ditto. > net.inet.tcp.sendspace=65536 This is the default setting. > net.inet.tcp.keepidle=300000 > net.inet.tcp.keepintvl=60000 > net.inet.ip.fw.dyn_max=65535 > net.inet.ip.fw.dyn_buckets=65536 > net.inet.ip.fw.dyn_ack_lifetime=120 > net.inet.ip.fw.dyn_syn_lifetime=10 > net.inet.tcp.nolocaltimewait=1 > security.bsd.hardlink_check_uid=1 > security.bsd.hardlink_check_gid=1 > security.bsd.see_other_uids=0 > security.bsd.see_other_gids=0 -- Andre
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