I personally think its too big. Large amounts of data like that should
be put in request scope so that it gets flushed out of memory right
away. If you need the data to be persistent through the user's session
lifetime, mabye try serializing it to a database. Of course, different
situations call for different solutions. Also, I would try and replace
your Vector with a non-synchronized Collection like an ArrayList or
LinkedList unless you have some sort of mutlithreaded access to this
collection.
Riyad Kalla wrote:
Larry,
Good question. I am curious what others think about this situation as well.
On Thursday 27 May 2004 08:24 am, Zhang, Larry (L.) wrote:
It is apparent true that if the session size is big, the performance will
be negatively affected. The question is that how to actively control the
size of session.
Let's discuss this question:
I have a page which displays all the subordinates of a manager, for some
reasons I want to create a List or a Vector containing all the subordinates
and put this List or Vector to the session. Each element in the List or
Vector is a Java object, Employee( each Employee object has 200 String
attributes, among which 5 are needed to be displayed on the screen)
A picture of this situation is:
Vector allSubordinates = new Vector();
allSubordinates.add(Employee1);
allSubordinates.add(Employee2);
.......
allSubordinates.add(Employee1000);
session.setAttribute("allSubordinates",allSubordinates);
Do you think this actually makes the session very big?
Then what will be the improvement of the following? Instead of add all the
employee objects, we create a very small object called DisplayObject, which
just contains the 5 attributes required on the screen.
Vector allSubordinates = new Vector();
allSubordinates.add(DisplayObject1);
allSubordinates.add(DisplayObject2);
.......
allSubordinates.add(DisplayObject1000);
session.setAttribute("allSubordinates",allSubordinates);
Your sharing of opinion is appreciated!
Thanks.
Larry
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