MySQL ERR File
If you are trying to troubleshoot your MySQL issues, the first place to look is in the .err file. The standard name for this file is HOSTNAME.err. Hostname would be what you see if you right click on "My Computer" and see what name your server has been assigned. The ERR file is in the DATA directory of your MySQL installation.
This file should tell you when the server reboots - when MySQL is started or the databases have to be rebuilt for some reason.
If this file gets large, go into your MYSQL interface and issue the command -
FLUSH LOGS;
This will rename your current log file to HOSTNAME.err-old and start you out with a fresh, small HOSTNAME.err file.
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