I found the settings
<property name="eclipselink.logging.level" value="INFO" />
<property name="eclipselink.logging.level.sql" value="FINE" />
to configure the EclipseLink logger individually, which is very nice. However, the generated SQL that is sent to the DB is unformatted - pretty unreadable.
<property name="hibernate.format_sql" value="true" />
for that purpose and it's quite nice.
Is there such a setting to format the generated SQL in EclipseLink, too?