thank you all for the elaborate explaination!
--- Günther Wieser <[EMAIL PROTECTED]> wrote:
> as long as you don't have a clustered environment or
> session persistence
> enabled in your servlet container, there shouldn't
> be much difference in
> adding an object to a session or request.
>
> but it doesn't make sense to put it in session scope
> if you don't use it is
> session scope, but only in request scope. this could
> make your life harder
> than you want it to be (e.g. if you forget to delete
> such objects).
>
> this leads to one issue for session scope: if you
> store things in session,
> you HAVE TO REMOVE them as soon as you don't need
> them anymore, otherwise
> you can run out of memory because these objects
> won't be garbage collected.
> and usually it's very hard to make sure that your
> web app DEFINITELY reaches
> the point of deleting things from a session (think
> about a user just
> pressing back or going to a different page before
> hitting your "remove"
> page). of course, everything will be dumped when the
> session expires, but if
> you have a lot of users in your web app and they
> stay for a long time, the
> memory consuption can become significant if you have
> a lot of session
> objects.
>
> kr,
> guenther
>
> -----Original Message-----
> From: wo_shi_ni_ba_ba
> [mailto:[EMAIL PROTECTED]
> Sent: Thursday, March 10, 2005 10:52 PM
> To: user@struts.apache.org
> Subject: session and request scope
>
> In terms of performance, does storing an attribute
> into the session cost
> more than storing it into the request? how
> significant is the overhead?
>
>
>
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