Date: Mon, 28 Feb 2011 00:09:58 -0800 (PST) From: Lep Names <leprasko@yahoo.com> To: freebsd-questions@freebsd.org Subject: server drop network connections Message-ID: <410789.77875.qm@web120601.mail.ne1.yahoo.com>
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Hello. I have so strange trouble: every week my server drop all network connections - ssh,ping etc. But it continue working. tech support can access it over kvm. after reboot everything works fine for a week. it seems to me that it's trouble in mbufs. FreeBSD 8.1-RELEASE-p2 sysctl.conf: security.bsd.see_other_uids=0 kern.ipc.somaxconn=2048 net.inet.icmp.drop_redirect=1 #net.inet.icmp.log_redirect=1 net.inet.tcp.blackhole=2 net.inet.tcp.drop_synfin=1 net.inet.tcp.sendspace=131072 net.inet.tcp.recvspace=65536 net.inet.udp.recvspace=32768 kern.fallback_elf_brand=-1 net.inet.ip.maxfragpackets=1024 kern.sync_on_panic=1 vfs.ufs.dirhash_maxmem=100000000 kern.polling.burst_max=1000 kern.polling.each_burst=1000 kern.polling.reg_frac=100 kern.polling.user_frac=1 kern.maxvnodes=256000 net.inet.ip.intr_queue_maxlen=256 #dev.em.0.rx_processing_limit=1000 #dev.em.1.rx_processing_limit=1000 net.inet.tcp.recvbuf_auto=0 net.inet.tcp.sendbuf_auto=0 net.inet.tcp.tso=0 net.isr.direct=1 net.route.netisr_maxqlen=1024 #net.inet.flowtable.nmbflows=8192 kern.ipc.nmbclusters=65536 net.inet.ip.portrange.first=1024 net.inet.ip.portrange.hifirst=1024 net.inet.tcp.hostcache.expire=1200 net.inet.tcp.fast_finwait2_recycle=1 net.inet.tcp.finwait2_timeout=3000 net.inet.tcp.keepinit=5000 net.inet.tcp.nolocaltimewait=1 net.inet.tcp.maxtcptw=65536 net.inet.tcp.msl=3000 kern.coredump=1 kern.random.sys.harvest.interrupt=0 kern.random.sys.harvest.ethernet=0 net.inet.udp.blackhole=1 netstat -m 868/1052/1920 mbufs in use (current/cache/total) 715/923/1638/65536 mbuf clusters in use (current/cache/total/max) 709/443 mbuf+clusters out of packet secondary zone in use (current/cache) 0/35/35/12800 4k (page size) jumbo clusters in use (current/cache/total/max) 0/0/0/6400 9k jumbo clusters in use (current/cache/total/max) 0/0/0/3200 16k jumbo clusters in use (current/cache/total/max) 1647K/2249K/3896K bytes allocated to network (current/cache/total) 0/0/0 requests for mbufs denied (mbufs/clusters/mbuf+clusters) 0/0/0 requests for jumbo clusters denied (4k/9k/16k) 139/313/6656 sfbufs in use (current/peak/max) 0 requests for sfbufs denied 0 requests for sfbufs delayed 4031 requests for I/O initiated by sendfile 0 calls to protocol drain routines it seems to me that i must enlarge 1920 value, but i do not know how. Thanks
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