MySQL 5.1.61 is only available to users on the CentOS 5 VPS plans. It is not available to users on Fedora Core or CentOS 4 VPS plans. A list of the most current versions available for the VPS plans is available here.
MySQL 5.1.61 is a bug fix and security release, no new features have been added.
InnoDB Storage Engine: This fix improves the performance of operations on VARCHAR columns in InnoDB tables, where N is declared as a large value but the actual string values in the table are short. (Bug #12835650)
InnoDB Storage Engine: The DATALENGTH column in the INFORMATIONSCHEMA.TABLES table now correctly reports the on-disk sizes of tablespaces for InnoDB compressed tables. (Bug #12770537)
The official Release Notes for MySQL 5.1.61 are available here - http://dev.mysql.com/doc/refman/5.1/en/news-5-1-61.html
MySQL 5.1.38 is only available to users on the CentOS 5 VPS plans. It is not available to users on Fedora Core or CentOS 4 VPS plans. A list of the most current versions available for the VPS plans is available here.
The official Release Notes for MySQL 5.1.38 are available here - http://dev.mysql.com/doc/refman/5.1/en/news-5-1-38.html
Before any upgrade, you should make a backup of your existing MySQL databases. See Backing up your MySQL Databases in the MySQL User Guide for more information.
To upgrade the application, go to the Control Panel > System tab (if necessary, click on Select Another System (Subscription) and choose the correct subscription) > Applications > MySQL-5. Click on the name of the application, and then on Upgrade To Latest.
