The recommendation is per cpu core and it is also a microsoft recommendation.

http://msdn.microsoft.com/en-us/library/ms175527(v=sql.105).aspx

I'm not entirely sure what you mean by "How can Microsoft release a product like this"......

Jeez, ok never mind, found the problem...

Someone set hyperbac up to compress trace files, thats why i could read them and why they didnt grow to the required size.

Thanks...

Nope

I tried that, it then just generates a series of 14kb trace files...