在linux的服务器下看到如下链接数超出的说明：
time wait bucket table overflow

Mar 15 16:18:03 mgZ kernel: TCP: time wait bucket table overflow
Mar 15 16:18:03 mgZ kernel: TCP: time wait bucket table overflow
Mar 15 16:18:03 mgZ kernel: TCP: time wait bucket table overflow
Mar 15 16:18:03 mgZ kernel: TCP: time wait bucket table overflow
Mar 15 16:18:03 imgZ kernel: TCP: time wait bucket table overflow
Mar 15 16:18:03 mgZ kernel: TCP: time wait bucket table overflow
Mar 15 16:18:03 mgZ kernel: TCP: time wait bucket table overflow


在配置参数中修改：
[root@mgZ log]# echo 20000 > /proc/sys/net/ipv4/tcp_max_tw_buckets

修改此配置文件
[root@mgZ log]# vim /etc/sysctl.conf

net.ipv4.tcp_max_tw_buckets = 20000

使其生效
[root@mgZ log]# sysctl -p
net.ipv4.ip_forward = 0
net.ipv4.conf.default.rp_filter = 1
net.ipv4.conf.default.accept_source_route = 0
kernel.sysrq = 0
kernel.core_uses_pid = 1
net.ipv4.tcp_syncookies = 1
kernel.msgmnb = 65536
kernel.msgmax = 65536
kernel.shmmax = 68719476736
kernel.shmall = 4294967296
net.ipv4.tcp_max_tw_buckets = 20000
net.ipv4.tcp_sack = 1
net.ipv4.tcp_window_scaling = 1
net.ipv4.tcp_rmem = 4096 87380 4194304
net.ipv4.tcp_wmem = 4096 16384 4194304
net.core.wmem_default = 8388608
net.core.rmem_default = 8388608
net.core.rmem_max = 16777216
net.core.wmem_max = 16777216
net.core.netdev_max_backlog = 262144
net.core.somaxconn = 262144
net.ipv4.tcp_max_orphans = 3276800
net.ipv4.tcp_max_syn_backlog = 262144
net.ipv4.tcp_timestamps = 0
net.ipv4.tcp_synack_retries = 1
net.ipv4.tcp_syn_retries = 1
net.ipv4.tcp_tw_recycle = 1
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_mem = 94500000 915000000 927000000
net.ipv4.tcp_fin_timeout = 1
net.ipv4.tcp_keepalive_time = 30
net.ipv4.ip_local_port_range = 1024 65000

看看统计的PV