Server load same after switch to litespeed

[bhanuprasad1981]

hi i am offering shared hosting just , i was on apache and usually load used to be between 1.0-2.0 but server used to crah at the time of regular backups,so i asked my data centre to install litespeed since i was thinking to expand hosting and i dont want crashes , but strange thing even after switch to litespeed load is same ? i tried to enable cache option using cache location to my second drive , but still no luck , please help me to optimize, i have xcache installed on server and main sites are vbulletin sites / image hosting sites