Memory issue as we run a simple application...

Question

Hi Experts,
  We developed an application in portal (EP7 sp 16, Linux, Oracle 10g) to connect to BW run a query ,base of users input, bring the result and show to user. This is some detail about our application:
1)     WebDynpro : The application is developed using SAP WebDynpro. The selection screen and Data output are developed using standard SAP WDP components.
2)     BW Call: Once user put the selection parameter and submit the request, SAP EP (WDP) makes a call to SAP BW Web Service (Query_view_data) using Adaptive WebService Model in the WebDynpro.
3)     Data Manipulation:- Once the data is returned from the web service (in the complex XML format) the web dynpro controller renders through XML and convert the data into table context. The table context is mapped to the view table where user can see the data with 20 records per page.
4)     Once the user has used the data the context node will be cleared.
The problem is as soon as we run the application(call a query), it took lots of memory in Portal server(2 G)and continuing to hit the max heap size once in every 90-120 minutes.
Do you think , there is any way to engage less memory.
Thanks

Answer 1

Hi,
With 2G, you mean that you application is occupying 2 GB or RAM or that the whole Server Node is using 2 GB? If it's the portal with your application that is using 2GB ... that's not too much.
Have you run the app in a dedicated application server? What's the behaviour there?
Start profiling your application:
Take a close look at step 3. What does really happen during the Data Manipulation? Depending on the size of the returned data and how this data gets analyzed and transformed to HTML this can be the source of your problem.
Did you use a lot of (maybe unecessary) Java imports? When the WebAS first has to load new libraries to the RAM this can eat up your free memory.
br,
Tobias