[httperf] (no subject)

[Wengui YANG(杨文贵)]

hello,
	
		I am going to test the performance of a web server, and I found some method with
google to optimize the performance of web server. Then, there are some configurations which
were used to optimize TCP and virtual memory system. The following lines copy from the file
--/etc/sysctl.conf.

# TCP optimization
net.ipv4.netfilter.ip_conntrack_tcp_timeout_syn_recv = 3
net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_max_syn_backlog = 8192
net.ipv4.tcp_fin_timeout = 30
net.ipv4.tcp_keepalive_time = 1800
net.ipv4.tcp_window_scaling = 0
net.ipv4.tcp_sack = 0
net.ipv4.tcp_timestamps = 0
# vm optimization
vm.lower_zone_protection = 100

who could send me detail information on the following two items:

net.ipv4.netfilter.ip_conntrack_tcp_timeout_syn_recv = 3
vm.lower_zone_protection = 100

Thanks in advance!				

　　　　　　　　Wengui YANG(杨文贵)
　　　　　　　　wgyang at mailst.xjtu.edu.cn
　　　　　　　　　　2005-03-13