Hi all,
I've been scratching my head a bit with a performance issue on a live system and was wondering if anyone could point me in the right direction for resolving? I have a load balancer using 2.4.32 stock kernel running LVS with HTTP & HTTPS in DR mode with 10 real servers each. The load balancer is a 2.4GHz Celeron with 512Mb RAM, broadcom gigabit nics. free -m shows 300MB used + 200MB cached (no swap file) When the active connections climb to 60,000 and throughput is about 100MB+ we get a sudden and massive drop of in throughput... We get a corresponding drop in system CPU and increase in Kernel CPU... I have a selection of graphs here including throughput and cpu usage etc. http://www.loadbalancer.org/test/ No errors in syslog relating to NICs or netfilter etc. The actual number of connections is actually about 9K or 11K/sec (Direct routing exagerating them), I was looking at using ipvsadm --set to reduce the TCP timeout and therefore connection table size but I don't think that the memory is an issue. Any other ideas? *NB. I've tested similar hardware to 800MB+ and 50K cons/sec (obviously with small/large packet sizes though not live data)* Many thanks in advance for any insight :-). -- Regards, Malcolm Turnbull. Loadbalancer.org Ltd. Phone: +44 (0)870 443 8779 http://www.loadbalancer.org/ _______________________________________________ Please read the documentation before posting - it's available at: http://www.linuxvirtualserver.org/ LinuxVirtualServer.org mailing list - [email protected] Send requests to [email protected] or go to http://lists.graemef.net/mailman/listinfo/lvs-users
