Dear Sergey, (BTW, your mail looks broken on the web mail archive [1]. Please check settings)
> Are you talking about checking for files in the pg_commit_ts directory of the > old cluster? > The possibility of copying the catalog is checked here: No. IIUC, the code check whether the old node has a commit timestamps, and copies them if it has. My scenario was that if the NEW node has already had a commit timestamps. In this case, existing entries would be overwritten after the upgrade. Then my question was that whether we need to ensure there are no commit timestamp entries in the new cluster. [1]: https://www.postgresql.org/message-id/[email protected] Best regards, Hayato Kuroda FUJITSU LIMITED
