Manage Reference Index
The reference index in TYPO3 is the table sys_.
(Related link: Soft references).
The table contains all relations/cross correlations between datasets.
For example a content element has an image and a link.
These two references can be found in this table stored against this
unique data record (tt_ uid).
When you want to perform a TYPO3 update it is recommended to update these relations. See t3upgrade:update-reference-index.
To perform an update you can use the TYPO3 Console command shown here t3upgrade:Major/PreupgradeTasks/Index#with-command-line-recommended.
TYPO3 installations with a small number of records this module can be used to t3upgrade:update-reference-index.
On TYPO3 installations with a large number of records and many relations between those the maximum run time of PHP will be reached and the scripts therefore fail. It is recommended to run the commands from the command line. This module outputs the commands with absolute paths to update or check the reference from the command line.
The Manage Reference Index action