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help / color / mirror / Atom feedFrom: Greg Hennessy <[email protected]>
To: [email protected]
Subject: Re: How to query with more workers on a large table with many partitions
Date: Wed, 1 Apr 2026 11:05:20 -0400
Message-ID: <[email protected]> (raw)
In-Reply-To: <CANHuRqH7q6bi7UAmW3w+o=11Sy1pzoY5KYsLfkpjS3X3T_OQHw@mail.gmail.com>
References: <CANHuRqH7q6bi7UAmW3w+o=11Sy1pzoY5KYsLfkpjS3X3T_OQHw@mail.gmail.com>
> I'm running PostgreSQL 16 on an AWS EC2 instance with 16 logical
> processors and 128G of RAM. How can I get PG to run the query with
> more workers?
>
Postgres allocates more workers based on the log3 of the ratio of the
table size to min_parallel_table_scan_size.
You may want to try |ALTER TABLE ... SET (parallel_workers = 10) (or
whatever your desired value is).
|
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