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Editor to share with you what the kernel parameters of keepalive under Linux mean, I believe most people do not know much about it, so share this article for your reference, I hope you will learn a lot after reading this article, let's learn about it!

Tcp_keepalive_time-INTEGER

After the connection is marked as requiring keepalive, the last data is sent and the interval between the first keepalive probe packet.

Default value: 2hours.

Tcp_keepalive_probes-INTEGER

The number of times keepalive probe packets are sent before deciding that the connection is disconnected and notifying the application layer.

Default value: 9.

Tcp_keepalive_intvl-INTEGER

After the keepalive probe packet starts, how often the probe packet is sent.

Default value: 75s

According to the above parameters, if a client sends a packet marked keepalive, if it is disconnected, the server needs 7200s+9*75s=7875s before the connection is released.

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