TCP Tuning
Optimizing HTTP Server Performance 4-3

Table 4–2 Tuning HP-UX for Performance Benchmarking

Parameter Scope Default Value Tuned
Value
tcp_time_wait_interval ndd/dev/tcp 60,000 60,000
tcp_conn_req_max ndd/dev/tcp 20 1,024
tcp_ip_abort_interval ndd/dev/tcp 600,000 60,000
tcp_keepalive_interval ndd/dev/tcp 7,20,00,000 900,000
tcp_rexmit_interval_initial ndd/dev/tcp 1,500 1,5 00
tcp_rexmit_interval_max ndd/dev/tcp 60,000 60,000
tcp_rexmit_interval_min ndd/dev/tcp 500 500
tcp_xmit_hiwater_def ndd/dev/tcp 32,768 32,768
tcp_recv_hiwater_def ndd/dev/tcp 32,768 32,768

Table 4–3 Tru64 TCP/IP Tunables

Parameter Module Default
value Tuned Value
tcbhashsize sysconfig -r inet 512 16,384
tcbhashnum sysconfig -r inet 1 16 (as of 5.0)
tcp_keepalive_default sysconfig -r inet 01
tcp_sendspace sysconfig -r inet 16,384 65,535
tcp_recvspace sysconfig -r inet 16,384 65,535
somaxconn sysconfig -r socket 1,0 24 65,535
sominconn sysconfig -r socket 0 65 ,535
sbcompress_threshold sysconfig -r socket 0600