Dimitri <dimitrik(dot)fr(at)gmail(dot)com> writes:
> Anyone may explain me why analyze target may have so huge negative
> secondary effect?..
If these are simple queries, maybe what you're looking at is the
increase in planning time caused by having to process 10x as much
statistical data. Cranking statistics_target to the max just because
you can is not necessarily a good strategy.
regards, tom lane