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From: Tom Lane <[email protected]>
To: Mark Kirkwood <[email protected]>
Cc: David Rowley <[email protected]>
Cc: [email protected]
Subject: Re: Unexpected planner choice in simple JOIN
Date: Wed, 07 Jan 2026 23:34:24 -0500
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>
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Mark Kirkwood <[email protected]> writes:
> Good suggestion. The results are...interesting:

It's clear that the planner is underestimating the costs of using a
parallel worker in your setup.  Try increasing parallel_setup_cost
and/or parallel_tuple_cost to bring things more in line with reality.

			regards, tom lane

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