Socket SO SNDBUF

External

• https://docs.oracle.com/javase/8/docs/api/java/net/SocketOptions.html

Internal

• DatagramSocket SO_SNDBUF
• TCP Socket SO_SNDBUF

Overview

The current value is obtained with getSendBufferSize() and set with setSendBufferSize(int). SO_SNDBUF is used by the network implementation as a hint to size the underlying I/O buffers. Calling setSendBufferSize(int) is no guarantee that the implementation will use the value, so the application may want to verify the buffer size with getSendBufferSize().

Also see net.core.wmem_default, net.core.wmem_max and other related Linux kernel configuration attributes.