Re: archive_command during database shutdown

On Wed, May 25, 2016 at 10:31 AM, Sameer Kumar <sameer(dot)kumar(at)ashnik(dot)com> wrote:
>
>
> On Thu, 26 May 2016, 1:25 a.m. Jeff Janes, <jeff(dot)janes(at)gmail(dot)com> wrote:
>>
>> I've recently wanted to run a different archive_command during
>> database shutdown than during normal operations. In particular, if
>> the normal archive process fails during normal operations, I want it
>> to be retried later (as it currently does). But if it fails during
>> shutdown, I want it to run a fallback archive_command.
>
>
> What version of PostgreSQL are you using?

9.2, 9.4, 9.5, 9.6beta.

>
>>
>> The only way I can see to accomplish this is to have the
>> archive_command try to connect back to the database and see if it gets
>> an error. That seems pretty ugly. Is there a better way?
>
>
> What's your goal here?

I want my database to shut down cleanly when I tell it to.

>
> During a shutdown, if you don't so much care about checkpoint and fsync of
> buffers to disk, you can do an immediate shutdown.

But I do care about the checkpoint. Otherwise you lose all your
unlogged tables. And probably other unfortunate things happen, as
well.

Cheers,

Jeff