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help / color / mirror / Atom feedFrom: Ron Johnson <[email protected]>
To: pgsql-general <[email protected]>
Subject: Re: size of attributes table is too big
Date: Wed, 19 Mar 2025 13:57:06 -0400
Message-ID: <CANzqJaAxC71J3wQjvPv2N37X1cDfnD_x+F3+tcsjG69PorSMWA@mail.gmail.com> (raw)
In-Reply-To: <CAC5iy61zUBySCMFH3JSKd6W922nV3fHMpXi+qUuPvXQ3shuOBg@mail.gmail.com>
References: <CAC5iy61zUBySCMFH3JSKd6W922nV3fHMpXi+qUuPvXQ3shuOBg@mail.gmail.com>
On Wed, Mar 19, 2025 at 1:06 PM Siraj G <[email protected]> wrote:
> Hello!
>
> I have a PG (v16) instance which is occupying around 1TB of storage. Out
> of this, around 350GB is occupied by the table pg_catalog.pg_attribute.
> Why is the catalog table's size so big?
>
> Here are the sizes:
>
> pg_attribute
> 338 GB
> pg_attribute_relid_attnam_index
> 117 GB
> pg_attribute_relid_attnum_index
> 69 GB
>
> I think this table must have tons of dead tuples. Please suggest to me if
> we can purge any data/shrink the size of this table.
>
>
Run pgstattuple and pgstatindex on them. They'll tell you how much bloat
you have.
And tune your autovacuum parameters to be more aggressive. These, for
example, are my settings:
autovacuum_analyze_scale_factor = 0.015
autovacuum_vacuum_scale_factor = 0.015
autovacuum_vacuum_insert_scale_factor = 0.015
autovacuum_vacuum_insert_threshold = 250
--
Death to <Redacted>, and butter sauce.
Don't boil me, I'm still alive.
<Redacted> lobster!
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