hello,
I did some investigation before posting.
i noticed that during the time when the httpd consumed 100% memory, only few swap was used.
i got a link on StackOverflow that says its normal as unused memory is wasted memory on Linux.
please let me have your views on this.
ps: I was guessing that before memory becomes 100% used, the swap would be used up first. but this is not the case.
thanks