standalone.xml

<size-rotating-file-handler name="FILE">
        <rotate-size>5MB</rotate-size>
  			<formatter>
					<pattern-formatter
						pattern="%d{yyyy/MM/dd HH:mm:ss,SSS} %-5p [%c] (%t) %s%E%n" />
				</formatter>
				<file relative-to="jboss.server.log.dir" path="server.log" />
				<append value="true" />
			</periodic-rotating-file-handler>

<size-rotating-file-handler name="sizeHandler" autoflush="true"> <file relative-to="jboss.server.log.dir" path="size.log"/> <rotate-size value="50m"/> <max-backup-index value="2"/> <append value="true"/> </size-rotating-file-handler>