Review the information in this section before upgrading. Perform any recommended actions.
Protect your data by creating a backup. The backup should include the
mysqlsystem database, which contains the MySQL system tables. See Section 7.2, “Database Backup Methods”.
Review Section 2.11.2, “Upgrade Paths” to ensure that your intended upgrade path is supported.
Review Section 2.11.3, “Changes in MySQL 5.5” for changes that you should be aware of before upgrading. Some changes may require action.
Review Section 1.4, “What Is New in MySQL 5.5” for deprecated and removed features. An upgrade may require changes with respect to those features if you use any of them.
Review Server and Status Variables and Options Added, Deprecated, or Removed in MySQL 5.6. If you use deprecated or removed variables, an upgrade may require configuration changes.
Review the Release Notes for information about fixes, changes, and new features.
If you use replication, review Section 17.4.3, “Upgrading a Replication Setup”.
Upgrade procedures vary by platform and how the initial installation was performed. Use the procedure that applies to your current MySQL installation:
For binary and package-based installations on non-Windows platforms, refer to Section 2.11.4, “Upgrading MySQL Binary or Package-based Installations on Unix/Linux”.
For installations on Windows, refer to Section 2.11.5, “Upgrading MySQL on Windows”.
If your MySQL installation contains a large amount of data that might take a long time to convert after an in-place upgrade, it may be useful to create a test instance for assessing the conversions that are required and the work involved to perform them. To create a test instance, make a copy of your MySQL instance that contains the
mysqldatabase and other databases without the data. Run the upgrade procedure on the test instance to assess the work involved to perform the actual data conversion.
Rebuilding and reinstalling MySQL language interfaces is recommended when you install or upgrade to a new release of MySQL. This applies to MySQL interfaces such as PHP
mysqlextensions and the Perl