Re: Enhance 'pg_createsubscriber' to retrieve databases automatically when no database is provided.

From: Ashutosh Bapat <ashutosh(dot)bapat(dot)oss(at)gmail(dot)com>
To: vignesh C <vignesh21(at)gmail(dot)com>
Cc: Shubham Khanna <khannashubham1197(at)gmail(dot)com>, Nisha Moond <nisha(dot)moond412(at)gmail(dot)com>, Ajin Cherian <itsajin(at)gmail(dot)com>, "Hayato Kuroda (Fujitsu)" <kuroda(dot)hayato(at)fujitsu(dot)com>, Peter Smith <smithpb2250(at)gmail(dot)com>, Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>
Subject: Re: Enhance 'pg_createsubscriber' to retrieve databases automatically when no database is provided.
Date: 2025-03-20 11:29:00
Message-ID: CAExHW5uCYaqcbxYXbkc29LehBOrVUt9qbHCZmahq2R6AKveBjA@mail.gmail.com
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On Thu, Mar 20, 2025 at 3:41 PM vignesh C <vignesh21(at)gmail(dot)com> wrote:
>
> On Thu, 20 Mar 2025 at 10:25, Shubham Khanna
> <khannashubham1197(at)gmail(dot)com> wrote:
> >
> >
> > I have created two patches, v16-0001 and v16-0002, to address the
> > performance issue. I conducted performance testing, and here are the
> > results:
> > - The difference in execution time between HEAD and the v15 patch was 53.2%.
> > - After removing the suggested test cases, the difference reduced to
> > 36.43%, showing a significant improvement.
> >
>
> It is still taking quite a while, can we compare with the following
> too see how much extra time it takes:
> a) remove insert and select verification for the all database
> successful tests as all of these are logical replication verification
> which is extensively tested

If the intent is to remove those, I don't think it's a good idea.
Other tests may be testing replication but they don't test the setup
created by --all, which consists of objects generated with names
crafted by utility.

Said that we should also test the behaviour when such objects already
exist. But I guess randomness in generated names is hard to control.

--
Best Wishes,
Ashutosh Bapat

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