NGINX Expert Needed - repost

I am using [login to view URL] The connection is not high, only 2000, netstat -an |grep 80 |wc -l 2000. but the load is super high, it's over 100. When I restart php_cgi, the load is low, but it goes high slowly. I notice the cpu usage is low, only 3%. And the memory usage is low as well, only 2G out 12 G. This is strange. Normally, with nginx+php_cgi, the memory usage is about 90%. The cpu usage is over 50%. I have server using nginx+php_cgi, it can handle 7000+ connection without an issue, the load is about 10. The only different is the version of nginx. The one on new server is latest version(nginx/1.4.1), the one I use for other project is nginx/1.0.15. The other different is the version of centos. here is the php_cgi config Quote: [ "$NETWORKING" = "no" ] && exit 0 spawnfcgi="/usr/bin/spawn-fcgi" php_cgi="/usr/bin/php-cgi" prog=$(basename $php_cgi) server_ip=[login to view URL] server_port=9000 server_user=nginx server_group=nginx server_childs=60 fork_child=3 pidfile="/var/run/[login to view URL]" # do not edit, put changes in /etc/sysconfig/phpfastcgi [ -f /etc/sysconfig/phpfastcgi ] && . /etc/sysconfig/phpfastcgi start() { [ -x $php_cgi ] || exit 1 [ -x $spawnfcgi ] || exit 2 echo -n $"Starting $prog: " daemon $spawnfcgi -a ${server_ip} -p ${server_port} -u ${server_user} -g ${server_group} -P ${pidfile} -C ${server_childs} -F ${fork_child} -f ${php_cgi} retval=$? echo return $retval } when the server has high load, there is error in the error log Quote: *19394689 connect() failed (110: Connection timed out) while connecting to upstream, client: [login to view URL], server: the server config Intel(R) Xeon(R) CPU E5620 @ 2.40GHz memory 12G.