Re: wait event and archive_command

On 2021/10/22 18:32, Michael Paquier wrote:
> On Thu, Oct 21, 2021 at 10:57:50PM +0900, Fujii Masao wrote:
>> Also how about adding wait events for other commands like
>> archive_cleanup_command, restore_command and recovery_end_command?
>
> +1 to add something for all of them as we track the startup process in
> pg_stat_activity. Thinking with a larger picture, this comes down to
> the usage of system(). We could introduce a small wrapper of system()
> that takes as argument a wait event for the backend.

That's an idea, but as far as I implemented the patch, introduing such wrapper
function doesn't seem to simplify or improve the source code.

Regards,

--
Fujii Masao
Advanced Computing Technology Center
Research and Development Headquarters
NTT DATA CORPORATION