$ cat /boot/config-2.6.24-19-generic | grep HZ # CONFIG_HZ_1000 is not set # CONFIG_HZ_300 is not set CONFIG_HZ=250 # CONFIG_HZ_100 is not set CONFIG_HZ_250=y CONFIG_MACHZ_WDT=m CONFIG_NO_HZ=y <<< here
more info >> http://kerneltrap.org/node/6750
Important kernel differences too: https://help.ubuntu.com/8.04/serverguide/C/preparing-to-install.html
