Re: track_planning causing performance regression

Hi

pá 3. 7. 2020 v 4:39 odesílatel Fujii Masao <masao(dot)fujii(at)oss(dot)nttdata(dot)com>
napsal:

>
>
> On 2020/07/01 7:37, Peter Geoghegan wrote:
> > On Tue, Jun 30, 2020 at 6:40 AM Fujii Masao <masao(dot)fujii(at)oss(dot)nttdata(dot)com>
> wrote:
> >> Ants and Andres suggested to replace the spinlock used in pgss_store()
> with
> >> LWLock. I agreed with them and posted the POC patch doing that. But I
> think
> >> the patch is an item for v14. The patch may address the reported
> performance
> >> issue, but may cause other performance issues in other workloads. We
> would
> >> need to measure how the patch affects the performance in various
> workloads.
> >> It seems too late to do that at this stage of v13. Thought?
> >
> > I agree that it's too late for v13.
>
> Thanks for the comment!
>
> So I pushed the patch and changed default of track_planning to off.
>

Maybe there can be documented so enabling this option can have a negative
impact on performance.

Regards

Pavel

>
> Regards,
>
> --
> Fujii Masao
> Advanced Computing Technology Center
> Research and Development Headquarters
> NTT DATA CORPORATION
>
>
>