Re: Host memory usage , when host is not in over committment state

Here is the overall guide for how VMware implements memory techniques.  You can look on page 14 for a small snippet how when to reclaim resources are done but honestly to get a good overall understanding you will have to read more of the documentation

http://www.vmware.com/files/pdf/mem_mgmt_perf_vsphere5.pdf

Here is also a good post by Frank Denneman which is old but the percentages are still good and give a good overview.

Memory reclamation, when and how? - frankdenneman.nl

Let me know if this helps and mark as helpful or solved if it does.