| From: | Bruce Momjian <bruce(at)momjian(dot)us> |
|---|---|
| To: | Luca Ferrari <fluca1978(at)gmail(dot)com> |
| Cc: | pgsql-performance(at)postgresql(dot)org |
| Subject: | Re: hint in determining effective_io_concurrency |
| Date: | 2021-04-22 19:52:32 |
| Message-ID: | 20210422195232.GA25061@momjian.us |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-performance |
On Thu, Apr 22, 2021 at 09:45:15PM +0200, Luca Ferrari wrote:
> Hi all,
> I'm unable to find (apparently) a way to find out a possible value to
> start with for effective_io_concurrency.
> I suspect that benchmarking, e.g., using bonnie++ or sysbench and
> testing with different values of concurrency could help to determine
> the max number of concurrent request, (tps, lower latency, ecc.).
> Is thjs correct or is there another suggested way?
I recommend 256 for SSDs or other RAM-like fsync systems, and maybe
maybe 16 for magnetic.
--
Bruce Momjian <bruce(at)momjian(dot)us> https://momjian.us
EDB https://enterprisedb.com
If only the physical world exists, free will is an illusion.
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Luca Ferrari | 2021-04-22 19:54:56 | Re: hint in determining effective_io_concurrency |
| Previous Message | Luca Ferrari | 2021-04-22 19:45:15 | hint in determining effective_io_concurrency |