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 <t...@sss.pgh.pa.us> ha scritto: > Marco Colli <collimarc...@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 >
