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===Optional : Change your guests kernel boot options===
===Optional : Change your guests kernel boot options===
Optionally, for best results with SME 8.x guests, modify /etc/grub.conf, adding divider=10 to the kernel boot options in order
Optionally, for best results with SME 8.x '''Guests''', modify /etc/grub.conf, adding "divider=10 clocksource=acpi_pm" to the kernel boot options in order to reduce the idle CPU load with Virtual Box.
to reduce the idle CPU load with VirtualBox. For example, if your kernel boot line is:
Accordingly to [http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1006427 this article from VmWare] and this one from [https://blogs.oracle.com/fatbloke/entry/speeding_up_your_linux_guests Oracle] on Linux Guests, you may find important informations on how and why modify your kernel options.
you can test this command line to see if you are concerned by this chapter mainly if the you have the same result as below :
you can test this command line to see if you are concerned by this chapter mainly if the you have the same result as below :
CONFIG_HZ_1000=y
CONFIG_HZ_1000=y
CONFIG_HZ=1000
CONFIG_HZ=1000
For example, if your kernel boot line is:
kernel /vmlinuz-2.6.18-348.6.1.el5 ro root=/dev/main/root
change it to:
kernel /vmlinuz-2.6.18-348.6.1.el5 ro root=/dev/main/root divider=10 clocksource=acpi_pm
{{Tip box|if you subsequently update SME Server '''Guest''' to use a newer kernel, you may need to change your kernel boot line to reflect the update.}}
===Kernel Upgrade===
===Kernel Upgrade===
