Linux Configuration

The following parameters must be added to the /etc/rc.d/rc.local file that gets executed during system start-up.

<-- begin
#max file count updated ~256 descriptors per 4Mb. 
Specify number of file descriptors based on the amount of system RAM.
echo "6553" > /proc/sys/fs/file-max
#inode-max 3-4 times the file-max
#file not present!!!!!
#echo"262144" > /proc/sys/fs/inode-max
#make more local ports available
echo 1024 25000 > /proc/sys/net/ipv4/ip_local_port_range
#increase the memory available with socket buffers
echo 2621143 > /proc/sys/net/core/rmem_max
echo 262143 > /proc/sys/net/core/rmem_default
#above configuration for 2.4.X kernels
echo 4096 131072 262143 > /proc/sys/net/ipv4/tcp_rmem
echo 4096 13107262143 > /proc/sys/net/ipv4/tcp_wmem
#disable "RFC2018 TCP Selective Acknowledgements," and 
"RFC1323 TCP timestamps" echo 0 > /proc/sys/net/ipv4/tcp_sack
echo 0 > /proc/sys/net/ipv4/tcp_timestamps
#double maximum amount of memory allocated to shm at runtime
echo "67108864" > /proc/sys/kernel/shmmax
#improve virtual memory VM subsystem of the Linux
echo "100 1200 128 512 15 5000 500 1884 2" > /proc/sys/vm/bdflush
#we also do a sysctl
sysctl -p /etc/sysctl.conf
-- end -->

Additionally, create an /etc/sysctl.conf file and append it with the following values:

<-- begin
 #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
fs.file-max=65536
vm.bdflush = 100 1200 128 512 15 5000 500 1884 2
net.ipv4.ip_local_port_range = 1024 65000
net.core.rmem_max= 262143
net.core.rmem_default = 262143
net.ipv4.tcp_rmem = 4096 131072 262143
net.ipv4.tcp_wmem = 4096 131072 262143
net.ipv4.tcp_sack = 0
net.ipv4.tcp_timestamps = 0

kernel.shmmax = 67108864

For further information on tuning Solaris system see the Solaris Tunable Parameters Reference Manual.