Re: max_standby_delay considered harmful

On Sun, May 9, 2010 at 12:47 PM, Greg Stark <gsstark@mit.edu> wrote:
> On Sun, May 9, 2010 at 4:00 AM, Greg Smith <greg@2ndquadrant.com> wrote:
>>  The use cases are covered as best they can be without better support from
>> expected future SR features like heartbeats and XID loopback.
>
> For what it's worth I think deferring these extra complications is a
> very useful exercise. I would like to see a system that doesn't depend
> on them for basic functionality. In particular I would like to see a
> system that can be useful using purely WAL log shipping without
> streaming replication at all.
>
> I'm a bit unclear how the boolean proposal would solve things though.
> Surely if you set the boolean to recovery-wins then when using
> streaming replication with any non-idle master virtually every query
> would be cancelled immediately as every HOT cleanup would cause a
> snapshot conflict with even short-lived queires in the slave.

It sounds to me like what we need here is some testing.

--
Robert Haas
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