What memory limit do You set in LVE ? In my observation: I have one customer which has about 800 unique visitor per day. Website is based on joomla 1.5 He has about 9-10 php processes, and each of them has memory usage: 30 MB real memory, and 440 virtual memory So the sum of virtual memory is ~4GB !! The standard limit of LVE z cPanel is 1GB of virtual memory ... How high do You raise memory limit on Your hosting ?