| From: | Andres Freund <andres(at)anarazel(dot)de> |
|---|---|
| To: | Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org> |
| Cc: | Masahiko Sawada <sawada(dot)mshk(at)gmail(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org> |
| Subject: | Re: Performance degradation on concurrent COPY into a single relation in PG16. |
| Date: | 2023-07-10 15:28:25 |
| Message-ID: | 20230710152825.tzo2mytblkj7beoa@awork3.anarazel.de |
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| Lists: | pgsql-hackers |
Hi,
On 2023-07-10 15:25:41 +0200, Alvaro Herrera wrote:
> On 2023-Jul-03, Masahiko Sawada wrote:
>
> > While testing PG16, I observed that in PG16 there is a big performance
> > degradation in concurrent COPY into a single relation with 2 - 16
> > clients in my environment. I've attached a test script that measures
> > the execution time of COPYing 5GB data in total to the single relation
> > while changing the number of concurrent insertions, in PG16 and PG15.
>
> This item came up in the RMT meeting. Andres, I think this item belongs
> to you, because of commit 00d1e02be2.
I'll take a look - I wasn't even aware of this thread until now.
Greetings,
Andres Freund
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