vbSEO causes server load

Well, I'm using hostgator and running a 3.7.4 vbulletin.
With vbSEO 3.3.0, my forum would go up and down through the entire day.

After reading some stories about vbseo, I tried disabling it and BAM! my forum was fast as lightning.

So, I'm wondering if there was a problem with vbSEO?

my forum is Skelegon :: Gaming Community - Powered by vBulletin

I'm using a shared host btw. I know that if I switch over to a dedi server, then the load will be gone but I prefer using less amount of money.

Thanks.

I'd suggest doing a search here for hostgator. There have been some horror stories. They don't seem to like vbseo-enabled forums.