Re: [PATCH] Send catalog_xmin separately in hot standby feedback

On 5 September 2016 at 12:40, Craig Ringer <craig@2ndquadrant.com> wrote:
> Hi all
>
> Currently hot standby feedback sends GetOldestXmin()'s result to the
> upstream as the required xmin. GetOldestXmin() returns a slot's
> catalog_xmin if that's the lowest xmin on the system.


Note that this patch changes the API to GetOldestXmin(), adding a new
boolean to allow it to disregard the catalog_xmin of slots.

Per Simon's feedback I'm going to split that out into a separate
patch, so will post a follow-up split one soon as the series.

-- Craig Ringer                   http://www.2ndQuadrant.com/PostgreSQL Development, 24x7 Support, Training & Services