Defines the default receive window size in bytes. Refer to Per-Route Metrics for a discussion of setting a different value on a per-route basis. See also max_buf and _recv_hiwat_minmss.
128,000
2,048 to the current value of max_buf
Yes
An application can use setsockopt (3XNET) SO_RCVBUF to change the individual connection's receive buffer.
Unstable