Hello Tom,
Both versions 10.5 and 11.1 are running on the same test server.
What I did was migrate the database from 10.5 to 11.1 via pg_upgrade. After successful execution, I performed "vacuumdb --all --analyze-in-stages".
Thanks,
Sanyo Capobiango
Em ter, 27 de nov de 2018 às 13:00, Tom Lane <tgl@xxxxxxxxxxxxx> escreveu:
Sanyo Moura <sanyo.moura@xxxxxxxxx> writes:
> And below are the times generated by EXPLAIN ANALYZE:
> 10.5
> Planning time: 126.080 ms
> Execution time: 2.306 ms
> 11.0
> Planning Time: 7.238 ms
> Planning Time: 2.638 ms
> 11.5 (I assume you mean 11.1 here)
> Planning Time: 15138.533 ms
> Execution Time: 2.310 ms
There were no changes between 11.0 and 11.1 that look like they'd affect
planning time. Nor does it seem particularly credible that planning time
would have dropped by a factor of 15 between 10.x and 11.x, especially
not given that the resulting plan didn't change. I think you've got some
external factor causing long planning times --- maybe something taking an
exclusive lock on one of the tables, or on pg_statistic?
regards, tom lane
