Sun Microsystems 820434310 manual File Descriptors, IP Stack Settings

Tuning for Solaris on x86

Some of the values depend on the system resources available. After making any changes to /etc/system, reboot the machines.

File Descriptors

Add (or edit) the following lines in the /etc/system file:

set rlim_fd_max=65536

set rlim_fd_cur=65536

set sq_max_size=0

set tcp:tcp_conn_hash_size=8192

set autoup=60

set pcisch:pci_stream_buf_enable=0

These settings affect the file descriptors.

IP Stack Settings

Add (or edit) the following lines in the /etc/system file:

set ip:tcp_squeue_wput=1

set ip:tcp_squeue_close=1

set ip:ip_squeue_bind=1

set ip:ip_squeue_worker_wait=10

set ip:ip_squeue_profile=0

These settings tune the IP stack.

To preserve the changes to the file between system reboots, place the following changes to the default TCP variables in a startup script that gets executed when the system reboots:

ndd -set /dev/tcp tcp_time_wait_interval 60000 ndd -set /dev/tcp tcp_conn_req_max_q 16384 ndd -set /dev/tcp tcp_conn_req_max_q0 16384 ndd -set /dev/tcp tcp_ip_abort_interval 60000 ndd -set /dev/tcp tcp_keepalive_interval 7200000 ndd -set /dev/tcp tcp_rexmit_interval_initial 4000 ndd -set /dev/tcp tcp_rexmit_interval_min 3000 ndd -set /dev/tcp tcp_rexmit_interval_max 10000 ndd -set /dev/tcp tcp_smallest_anon_port 32768 ndd -set /dev/tcp tcp_slow_start_initial 2

ndd -set /dev/tcp tcp_xmit_hiwat 32768 ndd -set /dev/tcp tcp_recv_hiwat 32768

Chapter 5 • Tuning the Operating System and Platform 99