Sun Microsystems 820434310 manual Tuning UltraSPARC T1-Based Systems, Reboot the system

Tuning UltraSPARC® T1–Based Systems

2Add the following to /etc/sysctl.conf

#Disables packet forwarding net.ipv4.ip_forward = 0

#Enables source route verification net.ipv4.conf.default.rp_filter = 1

#Disables the magic-sysrq key kernel.sysrq = 0 net.ipv4.ip_local_port_range = 1204 65000 net.core.rmem_max = 262140 net.core.rmem_default = 262140 net.ipv4.tcp_rmem = 4096 131072 262140 net.ipv4.tcp_wmem = 4096 131072 262140 net.ipv4.tcp_sack = 0 net.ipv4.tcp_timestamps = 0 net.ipv4.tcp_window_scaling = 0 net.ipv4.tcp_keepalive_time = 60000 net.ipv4.tcp_keepalive_intvl = 15000 net.ipv4.tcp_fin_timeout = 30

3Add the following as the last entry in /etc/rc.local sysctl -p /etc/sysctl.conf

4Reboot the system.

5Use this command to increase the size of the transmit buffer: tcp_recv_hiwat ndd /dev/tcp 8129 32768

Tuning UltraSPARC® T1–Based Systems

Use a combination of tunable parameters and other parameters to tune UltraSPARC T1–based systems. These values are an example of how you might tune your system to achieve the desired result.

Tuning Operating System and TCP Settings

The following table shows the operating system tuning for Solaris 10 used when benchmarking for performance and scalability on UtraSPARC T1–based systems (64 bit systems).

Chapter 5 • Tuning the Operating System and Platform 103