Re: performance regression in 9.2/9.3

On Thu, Jun 5, 2014 at 9:54 AM, Linos <info@linos.es> wrote:
> What I don't understand is why the statistics have this bad information, all my tests are done on a database just
restoredand analyzed. Can I do something to improve the quality of my database statistics and let the planner do better
choices?Maybe increase the statistics target of the columns involved? 

By that I meant row count estimates coming out of the joins are way
off.  This is pushing the planner into making bad choices.  The most
pervasive problem I see is that the row count estimate boils down to
'1' at some juncture causing the server to favor nestloop/index scan
when something like a hash join would likely be more appropriate.

merlin