I am experiencing a large server load when I move a high traffic domain name to my wordpress multisite website. I have a new website set up on WordPress under test domain name, and everything works fine. But once I want to move the high traffic domain name to this new website, the server load goes through the roof. So I'm trying to figure out why it works fine for the test domain, and then doesn't work so fine for the domain I want to use.
I've removed all the unnecessary files such as extra fonts and plugins as well.
Any help would be great.