Encrypting the Undo Tablespace¶
The undo data may contain sensitive information about the database operations.
You can encrypt the data in an undo log using the
innodb_undo_log_encrypt option. You can change the setting for this variable
in the configuration file, as a startup parameter, or during runtime as a global
variable. The undo data encryption must be enabled; the feature
is disabled by default.
Dynamic: Yes Scope: Global Variable Type: Boolean Default Value: OFF
Defines if an undo log data is encrypted. The default for the undo log is “OFF”, which disables the encryption.
You can create up to 127 undo tablespaces and you can, with the server running, add or reduce the number of undo tablespaces.
If you disable encryption, any encrypted undo data remains encrypted. To remove this data, truncate the undo tablespace.