run "top -c" or "pstree -p", you can see many lsphp5 process, it's the php handler.
> 3. about 5.3.27 & other 5.2.17 why other websites are set to use old version? to reduce memory usage? i use PHP 5.4 now.
it's to separate the busiest website(or account) with others, easier to manage. you...