Re: Speedup twophase transactions

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От Stas Kelvich
Тема Re: Speedup twophase transactions
Дата
Msg-id 623C3077-C765-46B9-83EA-8D0B0B513019@postgrespro.ru
обсуждение исходный текст
Ответ на Re: Speedup twophase transactions  (Michael Paquier <michael.paquier@gmail.com>)
Ответы Re: Speedup twophase transactions  (Michael Paquier <michael.paquier@gmail.com>)
Список pgsql-hackers
> On 06 Sep 2016, at 12:09, Simon Riggs <simon@2ndquadrant.com> wrote:
>
> On 6 September 2016 at 09:58, Stas Kelvich <s.kelvich@postgrespro.ru> wrote:
>>
>> I'll check it against my failure scenario with subtransactions and post results or updated patch here.
>
> Make sure tests are added for that. It would have been better to say
> you knew there were bugs in it earlier.

I’ve spotted that yesterday during rebase. Sorry. Next time in same situation i’ll write right away
to save everyone’s time.

> On 06 Sep 2016, at 12:03, Michael Paquier <michael.paquier@gmail.com> wrote:
>
> On Tue, Sep 6, 2016 at 5:58 PM, Stas Kelvich <s.kelvich@postgrespro.ru> wrote:
>> Oh, I was preparing new version of patch, after fresh look on it. Probably, I should
>> said that in this topic. I’ve found a bug in sub transaction handling and now working
>> on fix.
>
> What's the problem actually?

Handling of xids_p array in PrescanPreparedTransactions() is wrong for prepared tx's in memory.

Also I want to double-check and add comments to RecoveryInProgress() checks in FinishGXact.

I’ll post reworked patch in several days.

--
Stas Kelvich
Postgres Professional: http://www.postgrespro.com
Russian Postgres Company





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