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time_wait 过多 造成网络慢 实战

 

sh-3.2# scripts]# netstat -an|awk /tcp/ {++S[$NF]}END {for (a in S) print a,S[a]}TIME_WAIT 33ESTABLISHED 70LISTEN 13
sh-3.2# 5 scripts]# cat /etc/sysctl.conf|awk /net.ipv4.tcp_syncookies|net.ipv4.tcp_tw_reuse|net.ipv4.tcp_tw_recycle|net.ipv4.tcp_fin_timeout/net.ipv4.tcp_syncookies = 1

可见上面的/proc/sys/net/ipv4相关参数并没有设置:

修改如下:

[root@Salt85 scripts]# cat /etc/sysctl.conf|awk /net.ipv4.tcp_syncookies|net.ipv4.tcp_tw_reuse|net.ipv4.tcp_tw_recycle|net.ipv4.tcp_fin_timeout/net.ipv4.tcp_syncookies = 1net.ipv4.tcp_tw_recycle = 1net.ipv4.tcp_tw_recycle = 1net.ipv4.tcp_tw_reuse = 1net.ipv4.tcp_fin_timeout = 30
[root@Salt85 scripts]# netstat -an|awk /tcp/ {++S[$NF]}END {for (a in S) print a,S[a]}TIME_WAIT 1ESTABLISHED 71LISTEN 13

解决TIME_WAITE过多的问题

time_wait 过多 造成网络慢 实战