CF10 tomcat metrics logging

I can not find the CF10 metrics logs.

Reference:

http://www.adobe.com/devnet/coldfusion/articles/coldfusion-tomcat.html

Says in part:

Logging mechanism in ColdFusion 10

ColdFusion 10 logs Tomcat metrics to metrics.log

I can not find the metrics log on the file system or CFadmin web page. Is there some way of enabling the CF10 metrics logging as there was with older CF7 8 9 versions to enable jrun metrics logging? eg:

http://helpx.adobe.com/coldfusion/kb/enable-metrics-logging-coldfusion-mx.html

As always thanks, Carl.