Re: hot_standby_feedback vs excludeVacuum and snapshots

On 11 June 2018 at 17:56, Andres Freund <andres@anarazel.de> wrote:

> I don't think this is a good idea. We shouldn't continue down the path
> of having running xacts not actually running xacts, but rather go back
> to including everything. The case presented in the thread didn't
> actually do what it claimed originally, and there's a fair amount of
> potential for the excluded xids to cause problems down the line.
>
> Especially not when the fixes should be backpatched.  I think the
> earlier patch should be reverted, and then the AEL lock release problem
> should be fixed separately.

Since Greg has not reappeared to speak either way, I agree we should
revert, though I will add comments to document this. I will do this
today.

Looks like we would need a multi-node isolation tester to formally
test the AEL lock release, so I won't add tests for that.

-- 
Simon Riggs                http://www.2ndQuadrant.com/
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