Server crashes every day

[FidiBus]

the memory display can be wrong on vservers, much depending on how they are setup.
no swap? (trash the vserver and get a better one)

don´t look at the memory-display, look at what processes are running and wich take up most mem. you can sort or scroll thru them with htop.

what are little-middle php scripts...for ex. wordpress will kill your server if you don´t optimize it.

then look at log-files to find out what the server kills!!!