Re: PostgreSQL 15-->18 slowdown?

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Israel Brewster <ijbrewster(at)alaska(dot)edu>
Cc: Ruben Morais <ruben(dot)gmorais(at)gmail(dot)com>, PostgreSQL General <pgsql-general(at)lists(dot)postgresql(dot)org>
Subject: Re: PostgreSQL 15-->18 slowdown?
Date: 2026-06-26 18:44:25
Message-ID: 1207571.1782499465@sss.pgh.pa.us
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Israel Brewster <ijbrewster(at)alaska(dot)edu> writes:

> SubPlan 1
> -> Limit (cost=0.00..0.48 rows=1 width=1)
> -> Nested Loop (cost=0.00..13833793.79 rows=29105774 width=1)
> -> Seq Scan on tilt_data (cost=0.00..13469970.40 rows=29105774 width=16)
> Filter: (station = stations.id)
> -> Materialize (cost=0.00..1.22 rows=1 width=16)
> -> Seq Scan on tilt_orientation (cost=0.00..1.21 rows=1 width=16)
> Filter: (station = stations.id)

Can you show us the EXPLAIN output for this part of the plan in v15?

regards, tom lane

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