Utilities such as htop, top, and the command free -mh all report a high usage of memory.  The thing is nothing was running.  It turns out to be explainable. Using the following commands, it was determined that VMware virtual server has enabled the vmw_balloon. [root@server1~]# lsmod | grep balloon vmw_balloon 18190 0 [root@server1~]# vmware-toolbox-cmd stat balloon 17960 MB VMware Tools…