Michael Paquier <michael(dot)paquier(at)gmail(dot)com> writes:
> On Sun, Aug 7, 2016 at 2:18 PM, <lr(at)pcorp(dot)us> wrote:
>> Given the timing of when the error started, I am highly suspecting this
>> commit:
>> Prevent "snapshot too old" from trying to return pruned TOAST tuples.
>> (Commit 3e2f3c2e423b3ae906668c186bac79522b8e3e29 by rhaas)
> Right. This bug is discussed here as well:
> https://www.postgresql.org/message-id/87vazemeda.fsf@credativ.de
> And it is tracked in the list of open items for 9.6.
Should be fixed now.
regards, tom lane