#!/sbin/sh
#
# Tuning Script for TCP Applications
# Version 1.1
# By Colin Bitterfield
# Excerpts from various sources
# To Install this script
# Copy file to /etc/init.d
# chown root:sys tcp-performance (Or whatever you named the script)
# chmod 755 tcp-performance
# ln -s /etc/init.d/tcp-performance /etc/rc3.d/S79tcp.performance
#
#
VERSION="1.1"
######################################################################

case "$1" in
start)
	echo "TCP Performance script ${VERSION}"
	/usr/sbin/ndd -set /dev/tcp tcp_deferred_ack_interval 1
        /usr/sbin/ndd -set /dev/tcp ip_ignore_redirect 1
        /usr/sbin/ndd -set /dev/tcp tcp_conn_grace_period 500
        /usr/sbin/ndd -set /dev/tcp tcp_conn_req_max_q 8096
        /usr/sbin/ndd -set /dev/tcp tcp_conn_req_max_q0 8096
        /usr/sbin/ndd -set /dev/tcp tcp_conn_req_min 1
        /usr/sbin/ndd -set /dev/tcp tcp_cwnd_max 65534
        /usr/sbin/ndd -set /dev/tcp tcp_fin_wait_2_flush_interval 16000
        /usr/sbin/ndd -set /dev/tcp tcp_ip_abort_cinterval 60000
        /usr/sbin/ndd -set /dev/tcp tcp_ip_abort_interval 60000
        /usr/sbin/ndd -set /dev/tcp tcp_keepalive_interval 90000
        /usr/sbin/ndd -set /dev/tcp tcp_recv_hiwat 32768
        /usr/sbin/ndd -set /dev/tcp tcp_rexmit_interval_initial 3000
        /usr/sbin/ndd -set /dev/tcp tcp_rexmit_interval_max 10000
        /usr/sbin/ndd -set /dev/tcp tcp_rexmit_interval_min 3000
        /usr/sbin/ndd -set /dev/tcp tcp_slow_start_initial 2
        /usr/sbin/ndd -set /dev/tcp tcp_time_wait_interval 60000
        /usr/sbin/ndd -set /dev/tcp tcp_xmit_hiwat 32768

        echo "NOTICE: Check the following parameters value in /etc/system"
        echo "          * set tcp:tcp_conn_hash_size=8192" 
        echo "          * set rlim_fd_max=4096" 
        echo "          * set rlim_fd_cur=2000" 

        cmdtext="setting"
        ;;
default)
        /usr/sbin/ndd  -set /dev/tcp ip_ignore_redirect 0
        /usr/sbin/ndd  -set /dev/tcp tcp_conn_grace_period 0
        /usr/sbin/ndd  -set /dev/tcp tcp_conn_req_max_q 128
        /usr/sbin/ndd  -set /dev/tcp tcp_conn_req_max_q0 1024
        /usr/sbin/ndd  -set /dev/tcp tcp_conn_req_min 1
        /usr/sbin/ndd  -set /dev/tcp tcp_cwnd_max 1048576
        /usr/sbin/ndd  -set /dev/tcp tcp_fin_wait_2_flush_interval 675000
        /usr/sbin/ndd  -set /dev/tcp tcp_ip_abort_cinterval 180000
        /usr/sbin/ndd  -set /dev/tcp tcp_ip_abort_interval 480000
        /usr/sbin/ndd  -set /dev/tcp tcp_keepalive_interval 7200000
        /usr/sbin/ndd  -set /dev/tcp tcp_recv_hiwat 24576
        /usr/sbin/ndd  -set /dev/tcp tcp_rexmit_interval_initial 3000
        /usr/sbin/ndd  -set /dev/tcp tcp_rexmit_interval_max 60000
        /usr/sbin/ndd  -set /dev/tcp tcp_rexmit_interval_min 400
        /usr/sbin/ndd  -set /dev/tcp tcp_slow_start_initial 4
        /usr/sbin/ndd  -set /dev/tcp tcp_time_wait_interval 240000
        /usr/sbin/ndd  -set /dev/tcp tcp_xmit_hiwat 16384

        cmdtext="resetting (kernel default)"
        ;;
show)
        echo "ip_ignore_redirect `/usr/sbin/ndd  /dev/tcp ip_ignore_redirect`" 
        echo "tcp_conn_grace_period `/usr/sbin/ndd  /dev/tcp tcp_conn_grace_period`"
        echo "tcp_conn_req_max_q `/usr/sbin/ndd  /dev/tcp tcp_conn_req_max_q`"
        echo "tcp_conn_req_max_q0 `/usr/sbin/ndd  /dev/tcp tcp_conn_req_max_q0`"
        echo "tcp_conn_req_min `/usr/sbin/ndd  /dev/tcp tcp_conn_req_min`"
        echo "tcp_cwnd_max `/usr/sbin/ndd  /dev/tcp tcp_cwnd_max`"
        echo "tcp_fin_wait_2_flush_interval `/usr/sbin/ndd  /dev/tcp tcp_fin_wait_2_flush_interval`"
        echo "tcp_ip_abort_cinterval `/usr/sbin/ndd  /dev/tcp tcp_ip_abort_cinterval`"
        echo "tcp_ip_abort_interval `/usr/sbin/ndd  /dev/tcp tcp_ip_abort_interval`"
        echo "tcp_keepalive_interval `/usr/sbin/ndd  /dev/tcp tcp_keepalive_interval`"
        echo "tcp_recv_hiwat `/usr/sbin/ndd  /dev/tcp tcp_recv_hiwat`"
        echo "tcp_rexmit_interval_initial `/usr/sbin/ndd  /dev/tcp tcp_rexmit_interval_initial`"
        echo "tcp_rexmit_interval_max `/usr/sbin/ndd  /dev/tcp tcp_rexmit_interval_max`"
        echo "tcp_rexmit_interval_min `/usr/sbin/ndd  /dev/tcp tcp_rexmit_interval_min`"
        echo "tcp_slow_start_initial `/usr/sbin/ndd  /dev/tcp tcp_slow_start_initial`"
        echo "tcp_time_wait_interval `/usr/sbin/ndd  /dev/tcp tcp_time_wait_interval`"
        echo "tcp_xmit_hiwat `/usr/sbin/ndd  /dev/tcp tcp_xmit_hiwat`"

        cmdtext="status"
        ;;

stop)
        cmdtext="stopping"
        ;;
*)
        echo "Usage: $0 {start|stop|show|default}"
        exit 1
        ;;
esac


exit 0