| From: | Nathan Bossart <nathandbossart(at)gmail(dot)com> |
|---|---|
| To: | Bharath Rupireddy <bharath(dot)rupireddyforpostgres(at)gmail(dot)com> |
| Cc: | "Bossart, Nathan" <bossartn(at)amazon(dot)com>, Julien Rouhaud <rjuju123(at)gmail(dot)com>, Michael Paquier <michael(at)paquier(dot)xyz>, Kyotaro Horiguchi <horikyota(dot)ntt(at)gmail(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org> |
| Subject: | Re: Add checkpoint and redo LSN to LogCheckpointEnd log message |
| Date: | 2022-01-27 23:57:49 |
| Message-ID: | 20220127235749.GA558032@nathanxps13 |
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| 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/
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