This is a copy of the mysql config files ( /etc/my.cnf ) I use for my production servers, this same configuration has been tested on a high traffic site, a forum server on vbulletin php software with over 1.2 million posts and over 2,000 concurrent users 24 hours a day. Also ive used this same configuration on another production server that manages over 15 high traffic and high data volume mysql databases.

I hope it helps, please notice this has been tested on MySQL server versions 4 and up.
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