Tom, Alvaro, Michael, and especially Septhen, thank you for your valuable comments.
I feel enlightened about mtime. My takeaway is: 1. Any other marker would be better (It can be WAL scan during archiving, some new LSN-based mechanics* et c.) 2. mtime could be used, with precautions described by Stephen are taken. But my other question still seems unanswered: can I use LSN logic for incrementing FSM and VM? Seems like most of the time there is valid LSN * I like the idea of using something for both incr(diff) backups and VACUUM, it worth thinking about. Best regards, Andrey Borodin. -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
