Linux内核参数调优

Linux中出现大量TIME_WAIT的解决办法

查看命令：netstat -ae | grep "TIME_WAIT" | wc -l

通过调整内核参数解决：vi /etc/sysctl.conf ，加入以下内容

• net.ipv4.tcp_tw_reuse = 1  

• net.ipv4.tcp_tw_recycle = 1

• net.ipv4.tcp_fin_timeout = 30

• net.ipv4.tcp_keepalive_probes = 5

• net.ipv4.tcp_keepalive_intvl = 20

• net.ipv4.tcp_keepalive_time = 1200

• net.ipv4.ip_local_port_range = 1024 65000

• net.ipv4.tcp_max_syn_backlog = 8192

• net.ipv4.tcp_max_tw_buckets = 5000

• net.ipv4.tcp_syncookies = 1 

  开启SYN Cookies，当出现SYN等待队列溢出时，启用cookies来处理，可防范少量SYN***，默认为0