| From: | "Anton A(dot) Melnikov" <a(dot)melnikov(at)postgrespro(dot)ru> |
|---|---|
| To: | Andres Freund <andres(at)anarazel(dot)de> |
| Cc: | "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org>, David Rowley <dgrowleyml(at)gmail(dot)com>, Michael Paquier <michael(at)paquier(dot)xyz> |
| Subject: | Re: Some performance degradation in REL_16 vs REL_15 |
| Date: | 2023-10-16 08:04:25 |
| Message-ID: | c1004775-977e-4645-aeef-1e37843d2f2b@postgrespro.ru |
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| Lists: | pgsql-hackers |
On 13.10.2023 05:05, Andres Freund wrote:
> Could you provide a bit more details about how you ran the benchmark? The
> reason I am asking is that ~330 TPS is pretty slow for -c20. Even on spinning
> rust and using the default settings, I get considerably higher results.
>
> Oh - I do get results closer to yours if I use pgbench scale 1, causing a lot
> of row level contention. What scale did you use?
I use default scale of 1.
And run the command sequence:
$pgbench -i bench
$sleep 1
$pgbench -c20 -T10 -j8
in a loop to get similar initial conditions for every "pgbench -c20 -T10 -j8" run.
Thanks for your interest!
With the best wishes,
--
Anton A. Melnikov
Postgres Professional: http://www.postgrespro.com
The Russian Postgres Company
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