Re: Sync Rep v19

On Fri, Mar 4, 2011 at 1:27 PM, Fujii Masao <masao(dot)fujii(at)gmail(dot)com> wrote:
> On Fri, Mar 4, 2011 at 7:01 AM, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
>> Simon Riggs <simon(at)2ndQuadrant(dot)com> writes:
>>> Anyway, this is code in the interrupt handler and only gets executed
>>> when we receive SIGTERM for a fast shutdown.
>>
>> I trust it's not getting *directly* executed from the interrupt handler,
>> at least not without ImmediateInterruptOK.
>
> Yes, the backend waits for replication while cancel/die interrupt is
> being blocked, i.e., InterruptHoldoffCount > 0. So SIGTERM doesn't
> lead the waiting backend to there directly. The backend reaches there
> after returning the result.

BTW, this is true in COMMIT and PREPARE cases, and false in
COMMIT PREPARED and ROLLBACK PREPARED cases. In the
latter cases, HOLD_INTERRUPT() is not called before waiting for
replication.

Regards,

--
Fujii Masao
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
NTT Open Source Software Center