I have got this from my server about wordpress problem issuse:
The database activity for WordPress blog was the only issue. I'm not sure how to be more clear about the issue, and I apologize for that. I'll see what I can do to get these databases enabled for you and monitor the server to ensure they don't create an issue. As for the server, the configuration is fine. The simple fact is that blog software is not coded to be efficient. Once a site gets very much traffic, if there's much data in the blog to parse from the database, it can just be too much for a shared server to handle (due to other clients being on it and it creating problems for them). The blog software isn't an issue for most users, but it can be with too much processing. This is true of any software. The problem with WordPress, is that it doesn't scale as well as some other software might and this is why you see the load issues associated with it.
What do you think of it, do you also have this kind of problem, that means when many people see your wordpress, it can cause a too intensive load problem for webhosting servers.