Re: Statistics on array values

Sorry, I don't understand your exact question about pg_stats. In any case I
cannot make strict assumptions about data, because that greatly varies from
project to project (it's a SaaS) and over time. To give an idea the table
has some tens of millions of rows, each project has from a few thousands to
a few millions of rows and each project has its own tags that the customer
can define (unlimited tags for each row, but usually only 1 - 10 actually
used)

Il Dom 2 Feb 2020, 19:32 Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> ha scritto:

> Marco Colli <collimarco91(at)gmail(dot)com> writes:
> > Unfortunately I don't get actual improvements. I use PG 11 and I run the
> > following commands:
> > ALTER TABLE subscriptions ALTER tags SET STATISTICS 1000;
> > ANALYZE subscriptions;
> > However the bias remains pretty much the same (slightly worse after). Any
> > idea?
>
> So what have you got in the pg_stats fields I asked about?
> How big is this table anyway (how many rows, how many different tag
> values)?
>
> regards, tom lane
>