Solaris Performance Tuning

Various parameters in the Solaris kernel can be used to fine-tune Proxy Server performance. The following table lists some of those parameters.

Table 19–1 Solaris Performance Tuning Parameters


Parameter	Scope	Default Value	Tuned Value	Comments
rlim_fd_max	/etc/system	1024	8192	Process open file descriptors limit. Should account for the expected load for the associated sockets, files, and pipes, if any.
rlim_fd_cur	/etc/system	64	8192
sq_max_size	/etc/system	2	0	Controls streams driver queue size. Setting this parameter to 0 makes means that the performance runs will not be affected by lack of buffer space. Set this parameter on clients, too.
tcp_close_wait_interval	ndd/dev/tcp	240000	60000	Set this parameter on clients, too.
tcp_conn_req_max_q	ndd/dev/tcp	128	1024
tcp_conn_req_max_q0	ndd/dev/tcp	1024	4096
tcp_ip_abort_interval	ndd/dev/tcp	480000	60000
tcp_keepalive_interval	ndd/dev/tcp	7200000	900000	For high traffic web sites, lower this value.
tcp_rexmit_interval_initial	ndd/dev/tcp	3000	3000	If retransmission is greater than 30-40%, increase this value.
tcp_rexmit_interval_max	ndd/dev/tcp	240000	10000
tcp_rexmit_interval_min	ndd/dev/tcp	200	3000
tcp_smallest_anon_port	ndd/dev/tcp	32768	1024	Set this parameter on clients, too.
tcp_slow_start_initial	ndd/dev/tcp	1	2	Slightly faster transmission of small amounts of data.
tcp_xmit_hiwat	ndd/dev/tcp	8129	32768	Use this parameter to increase the transmit buffer.
tcp_recv_hiwat	ndd/dev/tcp	8129	32768	Use this parameter to increase the receive buffer.

For more information about these parameters, see Chapter 5 of the Sun ONE Web Server 6.1 SP6 Performance Tuning, Sizing, and Scaling Guide at:

http://docs.sun.com/app/docs/doc/819-6516/