I've installed VMware player 64bit version 7 (upgraded from 6) for both Windows 7 and CentOS 6.5
I run usually centOS and Fedora as guest VM.
I've observed, that the RAM usage goes up (as it should) on Host OS when I spin multiple guest VM and also when I spin enterprise applications (IBM Websphere suite) on those guest VM.
On CentOS as host, I don't see RAM release after I shutdown guest VM or shutdown application on guest VM. Even after 15 – 20 min unless I reboot the host OS.
In comparison, when using Windows 7 as host, RAM release almost instantly.
These are same guest VM that I use on both Host OS.
The behavior was same on VMware player version 6.
Is VMware player is better optimized for Win than Linux? If not, what measure can I take to have RAM release when using CentOS as host?