Web Server Administration: Log File Directives
Log File Directives(http.conf)
TransferLog Location of the access log file
ErrorLog Location of the error log file
LogLevel Control the number of messages logged to the error_log
Possible values are: debug, info, notice, warn, error, crit, alert, emerg
LogFormat Sets the format of the default logfile named by the TransferLog directive. Also allows you to specify an alias for your format, so you can easily assign different formats to different files.
CustomLog Allows you to easily write other data to log files other than what is specified in TransferLog