| From: | Thom Brown <thom(at)linux(dot)com> |
|---|---|
| To: | Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org> |
| Cc: | Zhang Mingli <zmlpostgres(at)gmail(dot)com>, Andrey Lepikhov <a(dot)lepikhov(at)postgrespro(dot)ru>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Yuya Watari <watari(dot)yuya(at)gmail(dot)com>, David Rowley <dgrowleyml(at)gmail(dot)com>, PostgreSQL Developers <pgsql-hackers(at)lists(dot)postgresql(dot)org> |
| Subject: | Re: [PoC] Reducing planning time when tables have many partitions |
| Date: | 2022-11-17 12:04:46 |
| Message-ID: | CAA-aLv7S4WZywzPPHQDgZ=4jgUDRfzNiRd0PScq883n-Xr+n4g@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Thu, 17 Nov 2022 at 11:20, Thom Brown <thom(at)linux(dot)com> wrote:
>
> On Thu, 17 Nov 2022 at 09:31, Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org> wrote:
> >
> > On 2022-Nov-16, Thom Brown wrote:
> >
> > > Once the issue Tom identified has been resolved, I'd like to test
> > > drive newer patches.
> >
> > What issue? If you mean the one from the thread "Reducing
> > duplicativeness of EquivalenceClass-derived clauses", that patch is
> > already applied (commit a5fc46414deb), and Yuya Watari's v8 series
> > applies fine to current master.
>
> Ah, I see.. I'll test the v8 patches.
No issues with applying. Created 1024 partitions, each of which is
partitioned into 64 partitions.
I'm getting a generic planning time of 1415ms. Is that considered
reasonable in this situation? Bear in mind that the planning time
prior to this patch was 282311ms, so pretty much a 200x speedup.
Thom
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