Thread:Project:Support desk/Unusually Large database: 8GB/reply (6)

This should concatenate all revisions of the same page (except the current revision), as far as they are from before January 1st 2015, into one field inside the text table. The actual compression happens using the serialize function on the concatenated text.

You can check, if that worked by looking into a few records of the text table: Compressed records should no longer have the text inside the old_text field, but instead they should have a pointer to another row of the text table. This other row should then contain the concatenated and serialized string of all revisions of the page. If this is the case, the script worked correctly.