Some applications, like Oracle Directory Server, use cached memory and never release it. Users need to take this memory into account when planning the memory requirements.
Please report guests Buffered/Cached memory in addition to used memory.
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
https://rhn.redhat.com/errata/RHBA-2015-0206.html