Re: [HACKERS] WIP Patch: Pgbench Serialization and deadlock errors

From: Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>
To: Fabien COELHO <coelho(at)cri(dot)ensmp(dot)fr>
Cc: Marina Polyakova <m(dot)polyakova(at)postgrespro(dot)ru>, pgsql-hackers(at)postgresql(dot)org, Ildus Kurbangaliev <i(dot)kurbangaliev(at)postgrespro(dot)ru>, Teodor Sigaev <teodor(at)sigaev(dot)ru>
Subject: Re: [HACKERS] WIP Patch: Pgbench Serialization and deadlock errors
Date: 2018-11-19 20:00:25
Message-ID: 20181119200025.t2hpsmu724jp2fmf@alvherre.pgsql
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On 2018-Nov-19, Fabien COELHO wrote:

>
> Hello Alvaro,
>
> > I also think that the pgbench_error() patch should go in before the main
> > one. It seems a bit pointless to introduce code using a bad API only to
> > fix the API together with all the new callers immediately afterwards.
>
> I'm not that keen on this part of the patch, because ISTM that introduces
> significant and possibly costly malloc/free cycles when handling error,
> which do not currently exist in pgbench.

Oh, I wasn't aware of that.

> Related to Marina patch (triggered by reviewing the patches), I have
> submitted a refactoring patch which aims at cleaning up the internal state
> machine, so that additions and checking that all is well is simpler.
>
> https://commitfest.postgresql.org/20/1754/

let me look at this one.

> It has been reviewed, I think I answered to the reviewer concerns, but the
> reviewer did not update the patch state on the cf app, so I do not know
> whether he is unsatisfied or if it was just forgotten.

Feel free to update a patch status to "needs review" yourself after
submitting a new version that in your opinion respond to a reviewer's
comments.

--
Álvaro Herrera https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services

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