I was running out of disk space on a web server. Since the logs are stored on another drive and there wasn't any new files for the web sites, there had to be something else going on.
I found that the Tomcat service that comes with ColdFusion 10 was writing log files for every web page request in this folder {ColdFusion Root}\cfusion\runtime\logs. They accounted for 8GB of disk space!
The filenames were in this format: localhost_access_log.YYYY-MM-DD.txt
If you are running a single site on your ColdFusion server, this may be OK. The problem with the log files is that they only display the SCRIPT_NAME and QUERY_STRING for the request. You won't be able to tell which site the "/index.cfm" request is for. Maybe it can be configured to include the site hostname.
I would rather disable this logging as IIS logging is more informative.