As a VMware Certified Instructor, I get asked a lot of questions about configuration maximums, and in the past I used to reference a lot of PDFs.
Thankfully now, I don't have to, all I have to do is load a handy little website from VMware, that us the.
VMware Configuration Maximums website
At time of writing. The site covers/covered all of the current 6.x products, with the exception of the 6.5 Update 2 (that may now be there, depending on when this blog is accessed).
Here's the info and disclaimer from the above site. Thanks VMware.
This Configuration Maximums tool provides the recommended configuration limits for VMware products. When you configure, deploy and operate your virtual and physical equipment, it is highly recommended you stay at or below the maximums supported by your product. The limits presented in the tool are tested, recommended limits, and are fully supported by VMware.
Disclaimer: The limits can be affected by other factors, such as hardware dependencies. For more information about the supported hardware, see the appropriate hardware compatibility guide. It might not be possible to maximise all configuration settings and expect your desired outcome. To ensure that you do not exceed supported configurations for your environment, consult individual solution limits. The recommended configuration maximums do not represent the theoretical possibilities of your product.
As I also mention, this is a configuration maximum guide, and not a target to try to hit, think about your system, your SLAs, your Business, Function and Technology requirements, and then design your system appropriately.