For servers running Java 7 and hosting web applications like the administrative console, an inadequate PermSize setting might cause an OutOfMemoryError related to PermGen space, as shown in the following error log example:

[02/Mar/2016:07:50:27.017 -0600] threadID=2 category=UTIL
    severity=SEVERE_ERROR msgID=-1 msg="The server experienced an unexpected
    error. Please report this problem and include this log file.
    OutOfMemoryError: PermGen space
    (\nBuild revision: 22496\n"