On February 22, 2018 11:44:17 AM PST, Magnus Hagander <mag...@hagander.net> 
>On Thu, Feb 22, 2018 at 8:41 PM, Andres Freund <and...@anarazel.de>
>In this particular case that would at least phase 1 simplify it because
>we'd only need one process instead of worker/launcher. However, if we'd
>ever want to parallellize it -- or any other process of the style, like
>autovacuum -- you'd still need a launcher+worker combo. So making that
>particular scenario simpler might be worthwhile on it's own.

Why is that needed? You can just start two bgworkers and process a list of 
items stored in shared memory. Or even just check, I assume there'd be a 
catalog flag somewhere, whether a database / table / object of granularity has 
already been processed and use locking to prevent concurrent access.

Sent from my Android device with K-9 Mail. Please excuse my brevity.

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