| From: | Peter Geoghegan <pg(at)bowt(dot)ie> |
|---|---|
| To: | Andres Freund <andres(at)anarazel(dot)de> |
| Cc: | Michael Guissine <mguissine(at)gmail(dot)com>, Julien Rouhaud <rjuju123(at)gmail(dot)com>, Alexander Korotkov <akorotkov(at)postgresql(dot)org>, pgsql-bugs(at)lists(dot)postgresql(dot)org |
| Subject: | Re: BUG #17652: Performance degradation after migrating from v13.4 to v14.4 |
| Date: | 2022-10-19 20:20:37 |
| Message-ID: | CAH2-Wz=YgO0o0_Vq6jDsQAxSTrU7z21zKHiBLtVUA+Vd+KeR2w@mail.gmail.com |
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| Lists: | pgsql-bugs |
On Wed, Oct 19, 2022 at 1:12 PM Andres Freund <andres(at)anarazel(dot)de> wrote:
> The reason you're seeing this in 14 is likely the following entry in the
> release notes:
>
> > Allow GiST/GIN pg_trgm indexes to do equality lookups (Julien Rouhaud)
> > This is similar to LIKE except no wildcards are honored.
>
> CCed author/committer of that change. I suspect this would need proper costing
> to not be inadvertently be used.
I am reminded of this recent thread:
https://postgr.es/m/3188617.44csPzL39Z@aivenronan
(Perhaps you were thinking of the same thing already, but thought I'd
mention it, just in case.)
--
Peter Geoghegan
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