Criteria for moving old log messages to a separate file.
<ul>
<li><code>NONE</code> Messages accumulate in a single file.
You must erase the contents of the file when the size is too large.
Note that WebLogic Server sets a threshold size limit of 500 MB
before it forces a hard rotation to prevent excessive log file growth.
<li><code>SIZE</code> When the log file reaches the size that you specify
in <code>FileMinSize</code>, the server renames the file as
<code><i>FileName.n</i></code>.
<li><code>TIME</code> At each time interval that you specify in
<code>TimeSpan</code>, the server renames the file as <code><i>FileName.n</i></code>.
</ul>
<p>After the server renames a file, subsequent messages accumulate
in a new file with the name that you specified in
<code>FileName</code>.</p>
(Interface=weblogic.management.configuration.LogFileMBean Attribute=getRotationType)