Well
As soon as I post or make a topic,The Server load goes to 4-5 CPUs from 2-3 While my host provides me with Only 4 cpus. This doesn't happen everytime but….If making one topic/post increase the server load,how much the server load become one 4-5 Posts are made at once.(means when the site is famous) 
Is there any way,with which i can reduce the server load?Or anything that you guys can do?
Looking forward to something
Thanks
have you checked out the optimization section of our faq/wiki?
A couple of folks have experienced load issues depending on their avatar order… suggest searching for cpu issues and trying that too, though the vast majority of users are unaffected by it…
also a bit weird that it would be on a post, that is not the most cpu intensive time… are you using the google sitemaps plugin? if so, how often to you have sp generating the sitemap (every post is an option but not recommended)…
we are hard at work on v5.0 where we hope to implement some caching methods and other optimiztions…