Re: SQLFunctionCache and generic plans

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com>
Cc: Alexander Pyhalov <a(dot)pyhalov(at)postgrespro(dot)ru>, Alexander Korotkov <aekorotkov(at)gmail(dot)com>, pgsql-hackers(at)lists(dot)postgresql(dot)org, Ronan Dunklau <ronan(dot)dunklau(at)aiven(dot)io>
Subject: Re: SQLFunctionCache and generic plans
Date: 2025-02-27 20:45:33
Message-ID: 2616146.1740689133@sss.pgh.pa.us
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Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com> writes:
> čt 27. 2. 2025 v 20:52 odesílatel Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> napsal:
>> So taken together, our results are all over the map, anywhere
>> from 7% speedup to 7% slowdown. My usual rule of thumb is that

> Where do you see 7% speedup? Few lines up you wrote 0.7% faster.

Alexander got that on the fx4 case, according to his response a
few messages ago [1]. It'd be good if someone else could reproduce
that, because right now we have two "it's slower" results versus
only one "it's faster".

regards, tom lane

[1] https://www.postgresql.org/message-id/e5724d1ba8398c7ff20ead1de73b4db4%40postgrespro.ru

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