Currently, when transaction rollback occurs, the entire SPI cache is cleared. This can cause performance issues if rollbacks are happening more often.

The line responsible for clearing the entire cache: https://github.com/ezsystems/ezpublish-kernel/blob/cfe8d73146b6ab8dc3cc844ff4374ac18c31fbf1/eZ/Publish/Core/Persistence/Cache/TransactionHandler.php#L45
Related comment: https://github.com/ezsystems/ezpublish-kernel/blob/cfe8d73146b6ab8dc3cc844ff4374ac18c31fbf1/eZ/Publish/Core/Persistence/Cache/TransactionHandler.php#L19