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

On 2020/02/13 12:28, Michael Paquier wrote:
> 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.

Thanks for the advise! Patch attached.

I found that the wait events "LogicalRewriteTruncate" and
"GSSOpenServer" are not documented. I'm thinking to add
them into doc separately if ok.

Regards,

--
Fujii Masao
NTT DATA CORPORATION
Advanced Platform Technology Group
Research and Development Headquarters