How do I determine which mysql will safely work with plesk? I currently have plesk 7.5.4 which was just upgraded last night from 7.5.3 because I was informed by a nice lady from the plesk staff that upgrading to 7.5.4 should also upgrade the mysql. Well either the auto installer did not work properly (though it seems to have upgraded everything else just fine) becuase I still have mysql 4.0, or I was misinformed or misunderstood. Regardless, running the autoinstaller did not upgrade mysql 4.0 and I need to get that up to at least mysql 4.1 as I have a new customer that was previously using cpanel & mysql 4.1 and we cannot recover any of his DB backups as they were created with 4.1 on the cpanel system Therefore, How do I determine the best and safest mysql installation to update the current mysql 4.0 that I have? From the MySQL website, they suggest that MySQL 5.0 is the most recent STABLE release yet when upgrading, you should stay in the same series (and in this case that would be 4.1) http://dev.mysql.com/doc/refman/5.0/en/choosing-version.html However they do not say if it is compatible with plesk or not. So, if it is possible without causing any problems, I would like to upgrade my plesk 7.5.4 to MySQL 5.0 but I don't need any more problems so can you suggest the best and safest mySQL to upgrade to? Thank you for your time to read and understand this request. PS Just in case you need more information to make a decision or post a reply, please consider the following: We have two servers, one is a Celeron with SUSE linux 9.1 and the other is an Intel P4 with hyperthreading and SUSE Linux 9.1 Both have 1GB RAM and sufficient HD space and both have Plesk installed.