| From: | Michael Paquier <michael(dot)paquier(at)gmail(dot)com> |
|---|---|
| To: | Nikhil Sontakke <nikhils(at)2ndquadrant(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: | 2017-01-26 23:53:52 |
| Message-ID: | CAB7nPqQRFrC=ffuVEuwqqgPSABXmKt6PHVtsS7oMZcFp2q8exg@mail.gmail.com |
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On Thu, Jan 26, 2017 at 5:02 PM, Nikhil Sontakke
<nikhils(at)2ndquadrant(dot)com> wrote:
>>> Umm, AFAICS, CheckPointTwoPhase() does not get called in the "standby
>>> promote" code path.
>>
>> CreateRestartPoint() calls it via CheckPointGuts() while in recovery.
>
> May be that I am missing something.
>
> 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.
--
Michael
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