We see send (AR) which is the send buffer from the client.
我们看到SEND (AR)，它是客户机上的发送缓冲区。
The third value is the maximum send buffer space (overridden by wmem_max).
第三个值是发送缓冲区空间的最大字节数（该值会被 wmem_max 覆盖）。
The first value is the minimum number of bytes allocated for the socket's send buffer.
第一个值是为socket的发送缓冲区分配的最少字节数。
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