GREAT ! :up:, I guess I'm done now with my problem now ... thanks GOD !
After lots of analysis and monitoring I found that at the load peaks the online members are very high and the server runs out of memory at that time, so the server starts to use the hard disk (swap) instead of RAM, and that what causes the load to raaaaaise that much.
So I raised the RAM, used Memcache as a vB datastore and installed xCache .... and it worked just perfect !, no overloads or any thing right now.
Also the load average is now constantly under 1, so I guess I'll downgrade the server processor also !
I guess I'll downgrade it to a Single QuadCore or even a high speed DualCore !
As the load average is very very low right now compared to a Dual Xenon QuadCore Processor which should carry a load of 8 or something !
Really so happy right now, thanks GOD.
Thank you Joy and Jedi for your help and your time.
Regards.