don't load the feed, just update it

src/main/java/com/commafeed/backend/dao/GenericDAO.java

@@ -27,6 +27,14 @@ public abstract class GenericDAO<T extends AbstractModel> extends AbstractDAO<T>
 		models.forEach(m -> persist(m));
 	}
 
+	public void update(T model) {
+		currentSession().update(model);
+	}
+
+	public void update(Collection<T> models) {
+		models.forEach(m -> update(m));
+	}
+
 	public void merge(T model) {
 		currentSession().merge(model);
 	}

src/main/java/com/commafeed/backend/feed/FeedQueues.java

@@ -136,7 +136,7 @@ public class FeedQueues {
 		// update all feeds in the database
 		List<Feed> feeds = map.values().stream().filter(c -> config.getApplicationSettings().getHeavyLoad() ? !c.isUrgent() : true)
 				.map(c -> c.getFeed()).collect(Collectors.toList());
-		UnitOfWork.run(sessionFactory, () -> feedDAO.merge(feeds));
+		UnitOfWork.run(sessionFactory, () -> feedDAO.update(feeds));
 	}
 
 	/**