Linux内核参数调优

1. 查看socket状态
server1:~ # netstat -n | awk '/^tcp/ {++S[$NF]} END {for(a in S) print a, S[a]}'
TIME_WAIT 257
CLOSE_WAIT 117
FIN_WAIT2 2
ESTABLISHED 228
2. #vi /etc/sysctl.conf
3. 增加
   net.ipv4.tcp_keepalive_time = 120
   net.ipv4.tcp_keepalive_probes = 2
   net.ipv4.tcp_keepalive_intvl = 75
   net.ipv4.tcp_syncookies = 1
   net.ipv4.tcp_tw_reuse = 1
   net.ipv4.tcp_tw_recycle = 1
   net.ipv4.tcp_fin_timeout = 30
   net.ipv4.ip_local_port_range = 1024 65000
4. 保存，执行#sysctl –p生效