Apache time_wait connection Too many problem solving method _linux

Recently found that Apache and load balancer of the number of connections, and most of them are time_wait, adjust apache2.conf after the effect is not.

Resolve by adjusting kernel parameters:

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Vi/etc/sysctl.conf

Edit the file and add the following:

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Net.ipv4.tcp_syncookies = 1
Net.ipv4.tcp_tw_reuse = 1
Net.ipv4.tcp_tw_recycle = 1
Net.ipv4.tcp_fin_timeout = 30

Then, execute/sbin/sysctl-p to make the argument effective.

Net.ipv4.tcp_syncookies = 1 means to open syn cookies. When the SYN wait queue overflow occurs, cookies are enabled to handle, to prevent a small number of SYN attacks, the default is 0, indicating shutdown;

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Net.ipv4.tcp_tw_reuse = 1 means to turn on reuse. Allows time-wait sockets to be re used for a new TCP connection, which defaults to 0, indicating shutdown;
Net.ipv4.tcp_tw_recycle = 1 is a quick recycle of time-wait sockets on a TCP connection, and the default is 0, which means shutdown.
Net.ipv4.tcp_fin_timeout modification System Jin default timeout time

That way, you can solve the problem of too many Apache time_wait connections.