Kyotaro HORIGUCHI <horiguchi.kyot...@lab.ntt.co.jp> writes:
> At Mon, 26 Sep 2016 09:12:04 +0530, Amit Kapila <amit.kapil...@gmail.com>
> wrote in <caa4ek1k5yydmndko0zzw6wncn_dgfvha6dcycyuvkbwth5+...@mail.gmail.com>
>>> It seems to me that we do take actions for conflict resolution during
>>> the page deletion (that looks to be covered by XLOG_HEAP2_CLEANUP_INFO
>>> which we emit in vacuum), but not sure if that is sufficient.
>>> Consider a case where the new transaction is started on standby after
>>
>> Here by new transaction, I intend to say some newer snapshot with
>> valid MyPgXact->xmin.
> I agree to the diagnosis. So the WAL record is not necessary if
> it is a new page since no one cannot be grabbing it.
Thanks for reviving this thread and reviewing the problem.
I pushed the patch now with some more work on the comments.
regards, tom lane
