Re: wal recycling problem
Christoph Moench-Tegeder <cmt@burggraben.net>
From: Christoph Moench-Tegeder <cmt@burggraben.net>
To: Fabrice Chapuis <fabrice636861@gmail.com>
Cc: PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>
Date: 2023-10-02T10:06:37Z
Lists: pgsql-hackers
Hi, ## Fabrice Chapuis (fabrice636861@gmail.com): > on the other hand there are 2 slots for logical replication which display > status extended. I don't understand why given that the confirmed_flush_lsn > field that is up to date. The restart_lsn remains frozen, for what reason? There you have it - "extended" means "holding wal". And as long as the restart_lsn does not advance, checkpointer cannot free any wal beyond that lsn. My first idea would be some long-running (or huge) transaction which is in process (active or still being streamed). I'd recommend looking into what the clients on these slots are doing. Regards, Christoph -- Spare Space