Retina Macbook Pro getting VERY hot with use

[NJRonbo]

Noticed my Retina Macbook Pro has been getting very hot with use.

I have Istat Menu running and it shows a huge spike in CPU usage.

MDS runs at 96-99%.

What is that related to and should I shut it off?

(Running Mountain Lion BTW)

 

[spdntrxi]

you are missing details.. like what temps are you seeing..

open activity monitor and see what is using the CPU

 

[BlazednSleepy]

If it gets too hot then it will shut off on its own. But thats rare.

 

[NJRonbo]

Temperature is at 122 degrees.

Not sure what "too high" would be.

It seems Mail may be the culprit taking up 22% CPU. But even shutting that down I am still seeing spikes.

Checking Activity Monitor and CPU usage but I can't seem to get a firm reading as it keeps changing numbers and positions.

Ultimately, I am new at trying to decipher this kind of thing.

If someone can tell me what "too hot" may be, I would appreciate.

Nice to know the system will automatically shut down if it gets too hot to prevent damage.