Hi, Sean Davis schrieb:
You might also tell us what columns are indexed and be sure that you have done a vacuum analyze recently on the tables.
About indexed columns:
Vacuum analyze was done quite before doing that testing. I'll send the explain output later, thanks so long.There are indexes on person(pers_id), contact(id), contact(pers_id) and one on contact(kind, type).
Regards, Verena