To start with I would set logging to finest so you can check what is occurring. Ensure that the original query is not triggering other queries for related objects, (this may occur if LAZY is not working because weaving is not being used in your production server).
You could also try enabling the EclipseLink profiler, or use a third party profiler such as JProfiler.
You could also simplify the query to determine which part of it is causing the issue.
John Arevalo wrote
Now i'm facing a problem while load a query:
i've enabled logging.level to FINE in order to check Native Query,
executed from jdbc tool takes around 0,031 s.
i've loaded that ResultList in a h:selectOneMenu(JSF).
In develop environment works succesfully, but in prod Environment
takes around 15 seg. 200 objects are Mapped (aprx.).
no matter how many concurrent users are in the application, the
response time is the same.