Solaris Tunable Parameters Reference Manual - SCN Research
Solaris Tunable Parameters Reference Manual - SCN Research
Solaris Tunable Parameters Reference Manual - SCN Research
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Commitment Level<br />
Unstable<br />
tcp_rexmit_interval_min<br />
Description<br />
Default<br />
Range<br />
Dynamic?<br />
When to Change<br />
Specifies the default minimum retransmission time out (RTO)<br />
value. The calculated RTO for all TCP connections cannot be<br />
lower than this value. See also<br />
“tcp_rexmit_interval_max” on page 156.<br />
400 milliseconds<br />
1 millisecond to 20 seconds<br />
Yes<br />
Do not change the value in a normal network environment.<br />
TCP’s RTO calculation should cope with most RTT<br />
fluctuations. If, in some very special circumstances, the<br />
round-trip time (RTT) for a connection is about 10 seconds,<br />
increase this value. If you change this value, you should<br />
change the tcp_rexmit_interval_max parameter. Change<br />
the value of tcp_rexmit_interval_max to at least eight<br />
times the value of tcp_rexmit_interval_min.<br />
Commitment Level<br />
Unstable<br />
tcp_rexmit_interval_extra<br />
Description<br />
Default<br />
Range<br />
Dynamic?<br />
When to Change<br />
Specifies a constant added to the calculated retransmission<br />
time out value (RTO).<br />
0 milliseconds<br />
0 to 2 hours<br />
Yes<br />
Do not change the value.<br />
When the RTO calculation fails to obtain a good value for a<br />
connection, you can change this value to avoid unnecessary<br />
retransmissions.<br />
Commitment Level<br />
Unstable<br />
Chapter 4 • Internet Protocol Suite <strong>Tunable</strong> <strong>Parameters</strong> 157
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