Re: Some performance degradation in REL_16 vs REL_15

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