Horton

Re: Add checkpoint and redo LSN to LogCheckpointEnd log message

Nathan Bossart <nathandbossart@gmail.com>

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From: Nathan Bossart <nathandbossart@gmail.com>
To: Bharath Rupireddy <bharath.rupireddyforpostgres@gmail.com>
Cc: "Bossart, Nathan" <bossartn@amazon.com>, Julien Rouhaud <rjuju123@gmail.com>, Michael Paquier <michael@paquier.xyz>, Kyotaro Horiguchi <horikyota.ntt@gmail.com>, PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>
Date: 2022-01-27T23:57:49Z
Lists: pgsql-hackers 
On Thu, Jan 27, 2022 at 08:37:37PM +0530, Bharath Rupireddy wrote:
> I'm still not clear how the REDO location can be treated as a start
> LSN? Can someone throw some light one what this checkpoint's REDO
> location is?

It's the WAL insert location at the time the checkpoint began (i.e., where
you need to begin replaying WAL from after a crash).

-- 
Nathan Bossart
Amazon Web Services: https://aws.amazon.com/

Commits

  1. Add checkpoint and REDO LSN to log_checkpoints message.