On Thu, Jun 9, 2016 at 9:41 PM, Robert Haas <robertmh...@gmail.com> wrote:
> 2. The all-visible checks seemed to me to be incorrect and incomplete.
> I made the check match the logic in lazy_scan_heap.

Okay, I thought we just want to check for dead-tuples.  If we want the
logic similar to lazy_scan_heap(), then I think we should also consider
applying snapshot old threshold limit to oldestxmin.   We currently do that
in vacuum_set_xid_limits() for Vacuum.  Is there a reason for not
considering it for visibility check function?

With Regards,
Amit Kapila.
EnterpriseDB: http://www.enterprisedb.com

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