I'd point at the following as being a sterling candidate for being a cause of this being slow...
AND cont_publicacion.fecha_publicacion = (SELECT max(cp1.fecha_publicacion) FROM cont_publicacion cp1 WHERE cp1.id_instalacion = cont_publicacion.id_instalacion AND cp1.id_contenido = cont_publicacion.id_contenido AND cp1.generar_vainilla = cont_publicacion.generar_vainilla) May I suggest changing it to: AND cont_publicacion.fecha_publicacion = (SELECT cp1.fecha_publicacion FROM cont_publicacion cp1 WHERE cp1.id_instalacion = cont_publicacion.id_instalacion AND cp1.id_contenido = cont_publicacion.id_contenido AND cp1.generar_vainilla = cont_publicacion.generar_vainilla ORDER BY fecha_publicacion LIMIT 1) That would get rid of the aggregate that's sitting deep in the query. -- select 'cbbrowne' || '@' || 'libertyrms.info'; <http://dev6.int.libertyrms.com/> Christopher Browne (416) 646 3304 x124 (land) ---------------------------(end of broadcast)--------------------------- TIP 6: Have you searched our list archives? http://archives.postgresql.org