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help / color / mirror / Atom feedFrom: Álvaro Herrera <[email protected]>
To: Tom Lane <[email protected]>
Cc: [email protected]
Subject: Re: Accounting for metapages in genericcostestimate()
Date: Wed, 30 Apr 2025 12:47:51 +0200
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
On 2025-Apr-28, Tom Lane wrote:
> @@ -135,6 +141,7 @@ typedef struct
> double numIndexTuples; /* number of leaf tuples visited */
> double spc_random_page_cost; /* relevant random_page_cost value */
> double num_sa_scans; /* # indexscans from ScalarArrayOpExprs */
> + BlockNumber numNonLeafPages; /* # of index pages that are not leafs */
> } GenericCosts;
The idea you described seems quite reasonable, though I didn't review
the patch in detail.
I find the use of "leafs" as plural for "leaf" a bit strange ...
We already have uses of that word, but I wonder if they don't mostly
or exclusively come from non-native English speakers.
--
Álvaro Herrera Breisgau, Deutschland — https://www.EnterpriseDB.com/
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To: [email protected]
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Subject: Re: Accounting for metapages in genericcostestimate()
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