Finally Upgraded To Mountain Lion...Only To Regret Ever Doing So..

[murphychris]

Yeah, pageouts are too high, notice the computer is out of memory and is swapping to disk. Safari is porking out nearly a gig of RAM. The computer needs more memory; or you need to be more conservative how you use it. When the it starts swapping to disk, the disk is being heavily used, so it gets warm as well as the CPU and GPU if this is GPU accelerated content. Par for the course. YOu may also try Firefox for this, I've found it uses less memory than either Safari or Chrome. Safari is a huge memory pig.