Postgres Pro
Downloads
Home   >   mailing lists

Re: Make COPY format extendable: Extract COPY TO format implementations - Mailing list pgsql-hackers

From Junwang Zhao
Subject Re: Make COPY format extendable: Extract COPY TO format implementations
Date
Msg-id CAEG8a3+Y+qWU-qSzV4-GF2oQVSaCDoJ-mHTTqBZFPfQWhWuBfA@mail.gmail.com
Whole thread Raw
In response to Re: Make COPY format extendable: Extract COPY TO format implementations  (Michael Paquier <michael@paquier.xyz>)
List pgsql-hackers
Tree view 
On Thu, Feb 1, 2024 at 11:56 AM Michael Paquier <michael@paquier.xyz> wrote:
>
> On Thu, Feb 01, 2024 at 11:43:07AM +0800, Junwang Zhao wrote:
> > The first 6 rounds are like 10% better than the later 9 rounds, is this normal?
>
> Even with HEAD?  Perhaps you have some OS cache eviction in play here?
> FWIW, I'm not seeing any of that with longer runs after 7~ tries in a
> loop of 15.

Yeah, with HEAD. I'm on ubuntu 22.04, I did not change any gucs, maybe I should
set a higher shared_buffers? But I dought that's related ;(


> --
> Michael



--
Regards
Junwang Zhao

pgsql-hackers by date:

Previous
From: Michael Paquier
Date:
Subject: Re: Make COPY format extendable: Extract COPY TO format implementations
Next
From: Amit Kapila
Date:
Subject: Re: Synchronizing slots from primary to standby