tcp_xmit_hiwat

Description

The default send window size in bytes. Refer to the following discussion of per-route metrics for setting a different value on a per route basis. See tcp_max_buf also.

Default

16,384 bytes

Range

4096 to 1,073,741,824

Dynamic?

Yes

When to Change

Note that this is the default value. An application can use setsockopt(3SOCKET) SO_SNDBUF to change the individual connection's send buffer.

Commitment Level

Unstable