On 27 January 2017 at 09:59, Nikhil Sontakke <nikhils@2ndquadrant.com> wrote:
>>> But, I put the recovery process and the checkpointer process of the
>>> standby under gdb with breakpoints on these functions, but both did
>>> not hit CreateRestartPoint() as well as CheckPointGuts() when I issued
>>> a promote :-|
>>
>> No end-of-recovery checkpoints happen at promotion since 9.3. You can
>> still use fallback_promote as promote file to trigger the pre-9.2 (9.2
>> included) behavior.
>
> Ok, so that means, we also need to fsync out these 2PC XIDs at promote
> time as well for their durability.
Why? The data files haven't been fsynced either at that point.
If there is a bug there it doesn't just affect 2PC.
What sequence of actions would cause data loss?
--
Simon Riggs http://www.2ndQuadrant.com/
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