Just noticed the following topic, which definitely contains some good info about how ESX deals with memory. Thanks to Kit for clearing things up. These posts are valuable, keep ’em coming!
a short outtake:
Basically how aggressive do you want TPS to scan for shared pages? Obviously TPS has a cost to running in terms of CPU, but has benefits in terms of reduced memory usage. So there’s a tradeoff. We have a default that we think is a good balance, but we let the user modify that if they want.