Date: Sun, 24 May 2015 17:12:51 +0200 From: Cs <bimmer@field.hu> To: freebsd-performance@freebsd.org Subject: FreeBSD 10.1-REL - network unaccessible after high traffic Message-ID: <5561EA73.20005@field.hu>
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Hi all, I have two FreeBSd 10.1-RELEASE servers connected to each other. They were connected via cross link, but they are connected to a cisco switch now. When transferring huge files (50-500GB backup files) via Gigabit (it is important!) the network randomly dies. The backup runs every day/week and sometimes the connection is ok for months sometimes it happens twice a week. When the network dies I can log in to the server via IPMI and use the console everything is OK, but can't send anything out on the network. ifconfig em0 down/up doesn't help nor netif restart. The problem never occured when I used 100Mbit connection between them, but it was 3com NIC (xl), gigabit adapter is Intel (em0). When I limit the transfer rate (rsync bandwith limit or ipfw pipe) the problem is much more rare. I tried to set these tuning parameters on both servers with different buffer size but nothing helped: # cat /etc/sysctl.conf security.bsd.see_other_uids=0 net.inet.tcp.recvspace=512000 net.route.netisr_maxqlen=2048 kern.ipc.nmbclusters=1310720 net.inet.tcp.sendbuf_max=16777216 net.inet.tcp.recvbuf_max=16777216 kern.ipc.soacceptqueue=32768 # cat /boot/loader.conf geom_mirror_load="YES" # RAID1 disk driver (see gmirror(8)) ipfw_load="YES" net.inet.ip.fw.default_to_accept=1 kern.maxusers=4096 accf_data_load="YES" Any ideas? Thanks guys!
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