Timeout connects too many solutions after using PHP to connect to Redis

This problem, you will definitely encounter after using PHP Redis. Therefore, this dish in the principle of open-minded advice, but also around the internet for advice. The answers are the following two kinds:

1, Redis does not actively close.

After the discovery, this answer is purely baseless assertion, nonsense.

2, configure the/etc/sysctl.conf, change the following configuration:

Net.ipv4.tcp_syncookies = 1
Net.ipv4.tcp_tw_reuse = 1
Net.ipv4.tcp_tw_recycle = 1
Net.ipv4.tcp_fin_timeout = 20

On this plan, although more reliable, but not exactly the bull's eye. After executing the/sbin/sysctl-p, the connection to the Timewait state was found to be not improved.

After a search, finally the dish finally found the cause, the solution is configured as follows:

/etc/sysctl.conf

Net.ipv4.tcp_syncookies = 1

Net.ipv4.tcp_tw_reuse = 1

Net.ipv4.tcp_tw_recycle = 1

Net.ipv4.tcp_timestamps = 1

Net.ipv4.tcp_fin_timeout = 20

After the configuration is complete, perform/sbin/sysctl-p and run Redis again for problem resolution.

Data reference:

http://www.2cto.com/net/201503/381132.html Server TCP connection timewait too much optimization and detailed analysis

Timeout connects too many solutions after using PHP to connect to Redis