UDP Network parameters for RAC on Solaris

When using RAC, it is important to set udp_xmit_hiwat & udp_recv_hiwat network parameters to the OS maximum

Normally I add a file in /etc/rc2.d/S75OracleNetTweaks

#!/usr/bin/sh

/usr/sbin/ndd -set /dev/udp udp_xmit_hiwat 65536
/usr/sbin/ndd -set /dev/udp udp_recv_hiwat 65536

File permissions should be

-rwxr–r– 1 root root 113 Nov 15 2006 S75OracleNetTweaks

This will make these settings persistant, even after node reboot

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