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help / color / mirror / Atom feedFrom: Andrei Lepikhov <[email protected]>
To: David Rowley <[email protected]>
Cc: Ilia Evdokimov <[email protected]>
Cc: Lukas Fittl <[email protected]>
Cc: Daniel Gustafsson <[email protected]>
Cc: PostgreSQL Hackers <[email protected]>
Cc: Nikolay Samokhvalov <[email protected]>
Subject: Re: Add estimated hit ratio to Memoize in EXPLAIN to explain cost adjustment
Date: Tue, 25 Mar 2025 07:40:47 +0100
Message-ID: <[email protected]> (raw)
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On 24/3/2025 23:05, David Rowley wrote:
> On Tue, 25 Mar 2025 at 10:23, Andrei Lepikhov <[email protected]> wrote:
>>
>> On 3/23/25 22:16, David Rowley wrote:
>>> Once again, I'm not necessarily objecting to hit and evict ratios
>>> being shown, I just want to know they're actually useful enough to
>>> show and don't just bloat the EXPLAIN output needlessly. So far your
>>> arguments aren't convincing me that they are.
>
>> I'm -1 for this redundancy.
>
> I'm not following what the -1 is for. Is it for showing both hit and
> evict ratios? And your vote is only for adding hit ratio?
Oh, pardon me. I wanted to say that IMO, the couple (capacity, distinct
lookup keys) makes redundant (hit ratio, eviction ratio) and vice versa.
--
regards, Andrei Lepikhov
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Subject: Re: Add estimated hit ratio to Memoize in EXPLAIN to explain cost adjustment
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