Re: size of attributes table is too big

On Wed, Mar 19, 2025 at 1:06 PM Siraj G <tosiraj(dot)g(at)gmail(dot)com> 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

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