From: Tom Lane <tgl@sss.pgh.pa.us>
To: Marco Colli <collimarco91@gmail.com>
Cc: pgsql-performance@lists.postgresql.org
Subject: Re: Statistics on array values
Date: Sun, 02 Feb 2020 13:32:02 -0500
Message-ID: <21162.1580668322@sss.pgh.pa.us> (raw)
In-Reply-To: <CAFvCgN5G+V1TWwmm82SPxnxawmsKOtW+sTjxQ5P7oJPMXi4akQ@mail.gmail.com>
References: <CAFvCgN4d9G6=u-_jJPBZhTSdf1Uqo+-txwWdAp_hCDKXbBQOHw@mail.gmail.com>
<2661.1580663465@sss.pgh.pa.us>
<CAFvCgN5G+V1TWwmm82SPxnxawmsKOtW+sTjxQ5P7oJPMXi4akQ@mail.gmail.com>
Marco Colli <collimarco91@gmail.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
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To: pgsql-performance@postgresql.org
Cc: tgl@sss.pgh.pa.us, collimarco91@gmail.com, pgsql-performance@lists.postgresql.org
Subject: Re: Statistics on array values
In-Reply-To: <21162.1580668322@sss.pgh.pa.us>
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