Re: Wait event that should be reported while waiting for WAL archiving to finish

From: Michael Paquier <michael(at)paquier(dot)xyz>
To: Fujii Masao <masao(dot)fujii(at)oss(dot)nttdata(dot)com>
Cc: pgsql-hackers(at)postgresql(dot)org
Subject: Re: Wait event that should be reported while waiting for WAL archiving to finish
Date: 2020-02-13 03:28:04
Message-ID: 20200213032804.GB1520@paquier.xyz
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On Thu, Feb 13, 2020 at 02:29:20AM +0900, Fujii Masao wrote:
> When I saw pg_stat_activity.wait_event while pg_basebackup -X none
> is waiting for WAL archiving to finish, it was either NULL or
> CheckpointDone. I think this is confusing. What about introducing
> new wait_event like WAIT_EVENT_BACKUP_WAIT_WAL_ARCHIVE
> (BackupWaitWalArchive) and reporting it during that period?

Sounds like a good idea to me. You need to be careful that this does
not overwrite more low-level wait event registration though, so that
could be more tricky than it looks at first sight.
--
Michael

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