Re: [EXTERNAL] Re: Add non-blocking version of PQcancel

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От Alvaro Herrera
Тема Re: [EXTERNAL] Re: Add non-blocking version of PQcancel
Дата
Msg-id 202403281753.ku5k2jvaw5fo@alvherre.pgsql
обсуждение исходный текст
Ответ на Re: [EXTERNAL] Re: Add non-blocking version of PQcancel  (Tom Lane <tgl@sss.pgh.pa.us>)
Ответы Re: [EXTERNAL] Re: Add non-blocking version of PQcancel  (Tom Lane <tgl@sss.pgh.pa.us>)
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On 2024-Mar-28, Tom Lane wrote:

> Jelte Fennema-Nio <postgres@jeltef.nl> writes:
> 
> > I think we don't really want to make the timeout too short. Otherwise
> > the query might get cancelled before we push any query down to the
> > FDW. I guess that means that for some slow machines even 10ms is not
> > enough to make the test do the intended purpose. I'd keep it at 10ms,
> > which seems long enough for normal systems, while still being pretty
> > short.
> 
> If the test fails both when the machine is too slow and when it's
> too fast, then there's zero hope of making it stable and we should
> just remove it.

It doesn't fail when it's too fast -- it's just that it doesn't cover
the case we want to cover.

-- 
Álvaro Herrera         PostgreSQL Developer  —  https://www.EnterpriseDB.com/
"Escucha y olvidarás; ve y recordarás; haz y entenderás" (Confucio)



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