Change MTU size
On gigabit networks, large maximum transmission units (MTU) sizes (JumboFrames) can provide better network performance for our HPC environment.
If you want to transfer large amounts of data at gigabit speeds, increasing the default MTU size can provide significant performance gains.
STEP #1 – Change MTU size with “ifconfig” command.
ifconfig eth0 mtu 9000 up
STEP #2 – To make this MTU size permanent. Put it under the interface configuration file i.e. /etc/sysconfig/networkscripts/ifcfg-eth0.
STEP #3 – Remember to restart the network service.
service network restart