Sun Microsystems Sun Java System Web Server 7.0, Руководство пользователя

Страница: 96 / 132

Tuning Solaris for Performance Benchmarking
The following table shows the operating system tuning for Solaris used when benchmarking for
performance and scalability. These values are an example of how you might tune your system to
achieve the desired result.
TABLE 4–1
Tuning Solaris for Performance Benchmarking
Parameter Scope Default Value Tuned Value Comments
rlim_fd_max /etc/system
65536 65536 Process open file descriptors limit;
should account for the expected load
(for the associated sockets, files, and
pipes if any).
sq_max_size /etc/system
2 0 Controls streams driver queue size;
setting to 0 makes it infinite so the
performance runs won’t be hit by lack
of buffer space. Set on clients too.
Note that setting s
q_max_size
to 0
might not be optimal for production
systems with high network traffic.
tcp_time_wait_interval ndd /dev/tcp
240000 60000 Set 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%, you should 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 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 To increase the transmit buffer.
tcp_recv_hiwat ndd /dev/tcp
8129 32768 To increase the receive buffer.
Tuning Solaris for Performance Benchmarking
Sun Java System Web Server 7.0 Update 1 Performance Tuning, Sizing, and Scaling Guide • 96