outgoingMessage.writableHighWaterMark

• <number>

如果套接字存在，则此 outgoingMessage.writableHighWaterMark 将是底层套接字的 highWaterMark。 否则，它将是默认的 highWaterMark。

highWaterMark 是套接字可以潜在缓冲的最大数据量。

• <number>

This outgoingMessage.writableHighWaterMark will be the highWaterMark of underlying socket if socket exists. Else, it would be the default highWaterMark.

highWaterMark is the maximum amount of data that can be potentially buffered by the socket.