| From: | Nikhil Sontakke <nikhils(at)2ndquadrant(dot)com> |
|---|---|
| To: | Michael Paquier <michael(dot)paquier(at)gmail(dot)com> |
| Cc: | Stas Kelvich <s(dot)kelvich(at)postgrespro(dot)ru>, Simon Riggs <simon(at)2ndquadrant(dot)com>, PostgreSQL mailing lists <pgsql-hackers(at)postgresql(dot)org>, Jesper Pedersen <jesper(dot)pedersen(at)redhat(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com> |
| Subject: | Re: Speedup twophase transactions |
| Date: | 2017-01-27 09:59:07 |
| Message-ID: | CAMGcDxftPGiVMrz+p-8kpef2O7gCOY13cuY1sx0F58BJ-=tdkw@mail.gmail.com |
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| Lists: | pgsql-hackers |
>> 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.
Regards,
Nikhils
--
Nikhil Sontakke http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services
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