Sun Microsystems 2005Q1 manual Max

		Tuning Parameters for /etc/system
Table B-3TCP/IP Options
	TCP/IP Options	Description
	ndd -set /dev/tcp	The maximum value of TCP congestion window (cwnd) in bytes.
	tcp_cwnd_max 65535
	ndd -set /dev/tcp	The default minimum retransmission timeout (RTO) value in
	tcp_rexmit_interval_min	milliseconds. The calculated RTO for all TCP connections cannot
3000		be lower than this value.
	ndd -set /dev/tcp	The default maximum retransmission timeout value (RTO) in
	tcp_rexmit_interval_	milliseconds. The calculated RTO for all TCP connections cannot
	max 10000	exceed this value.
	ndd -set /dev/tcp	The default initial retransmission timeout value (RTO) in
	tcp_rexmit_interval_	milliseconds
	initial 3000

ndd -set /dev/tcp tcp_time_wait_interv al 60000

ndd -set /dev/tcp tcp_keepalive_interv al 900000

The time in milliseconds a TCP connection stays in TIME-WAIT state. Refer to RFC 1122, 4.2.2.13 for more information.

The time in milliseconds a TCP connection stays in KEEP-ALIVE state. Refer to RFC 1122, 4.2.2.13 for more information.

ndd -set /dev/tcp tcp_conn_req_max_q <value>

ndd -set /dev/tcp tcp_conn_req_max_q0 <value>

ndd -set /dev/tcp tcp_ip_abort_interva l <value>

ndd -set /dev/tcp tcp_ip_abort_interva l <value>

The default maximum number of pending TCP connections for a TCP listener waiting to be accepted by accept(SOCKET).

The default maximum number of incomplete (three-way handshake not yet finished) pending TCP connections for a TCP listener.

Refer to RFC 793 for more information on TCP three-way handshake.

The default total retransmission timeout value for a TCP connection in milliseconds. For a given TCP connection, if TCP has been re-transmitting for tcp_ip_abort_interval period and it has not received any acknowledgment from the other endpoint during this period, TCP closes this connection.

Appendix B Analysis Tools 151