Re: [HACKERS] Patch: Write Amplification Reduction Method (WARM)

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От Andres Freund
Тема Re: [HACKERS] Patch: Write Amplification Reduction Method (WARM)
Дата
Msg-id 20170321162127.uytpf4td4sczebk4@alap3.anarazel.de
обсуждение исходный текст
Ответ на Re: [HACKERS] Patch: Write Amplification Reduction Method (WARM)  (Pavan Deolasee <pavan.deolasee@gmail.com>)
Список pgsql-hackers
On 2017-03-21 19:49:07 +0530, Pavan Deolasee wrote:
> On Tue, Mar 21, 2017 at 6:55 PM, Robert Haas <robertmhaas@gmail.com> wrote:
> 
> >
> > I think that very wide columns and highly indexed tables are not
> > particularly unrealistic, nor do I think updating all the rows is
> > particularly unrealistic.
> 
> 
> Ok. But those who update 10M rows in a single transaction, would they
> really notice 5-10% variation?

Yes. It's very common in ETL, and that's quite performance sensitive.

Greetings,

Andres Freund



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