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From: Justin Clift <[email protected]>
To: David Rowley <[email protected]>
Cc: Tom Lane <[email protected]>
Cc: nikhil raj <[email protected]>
Cc: pgsql-generallists.postgresql.org <[email protected]>
Cc: NIKITA PATEL <[email protected]>
Cc: Patel Khushbu <[email protected]>
Subject: Re: Significant Execution Time Difference Between PG13.14 and PG16.4 for Query on information_schema Tables.
Date: Wed, 28 Aug 2024 16:58:56 +1000
Message-ID: <[email protected]> (raw)
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On 2024-08-27 20:14, David Rowley wrote:
> On Tue, 27 Aug 2024 at 18:00, Justin Clift <[email protected]> 
> wrote:
>> As a general thought, seeing that this might be an actual problem
>> should some kind of automated testing be added that checks for
>> performance regressions like this?
> 
> We normally try to catch these sorts of things with regression tests.
> Of course, that requires having a test that would catch a particular
> problem, which we don't seem to have for this particular case.  A
> performance test would also require testing a particular scenario, so
> I don't see why that's better.  A regression test is better suited as
> there's no middle ground between pass and fail.

Yeah, that's the kind of thing I was thinking.

Any idea who normally does those, and if it would be reasonable to add
test(s) for the internal information tables?

Regards and best wishes,

Justin Clift






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