Questions about memory management

[Kjell]

Hi, I have a SL4 application which is basically a data mining engine with search results reported in a grid.  When my app first loads is uses about 100MB, each time I run a search the memory useage jumps by 80-100MB, it does not decrease unless the app sits idle for a long time.  Until now I have put pretty much zero thought into memory management so I am sure I have made some mistakes and hopefully they can be resolved easily.  By the way the results sets I am testing with contain about 2500-5000 items.

1. I know this is hard to gauge without knowing more about my app, but is this type of memory usage unusual?
2. At the very least I would expect for usage to fluctuate rather than just climb.  For example say I start a new search, what do I need to do to make sure everything from the previous search is removed from memory?  I am using an observable collection to store the search results and then bind them to the grid, clearing the collection doesn't seem to have any impact. 

I realize you probably need more info but I am also looking for pretty general guidance and "best practice" tips. 

I am using "RadControls_for_Silverlight_4_2010_2_0714_DEV_hotfix" on a windows 2003 server, C#, IE 8.

[Kjell]

Just to be clear, I am taking about memory useage on the client side.

[Kjell]

Here is another example though not related to the gridview:  I open a popup, memory jumps by 2-4mb, close it, memory stays the same, open it, memory goes up again.  So I can ratched up the memory useage just by opening and closing the popup over and over. I'm thinking that something needs to happen in the close, all I do is set popup.IsOpen = false, but how do I properly dispose it?

[Vlad]

Hi Kjell,

 My suggestion is to check the application for memory leaks using Windbg. We had such problems however all of them were fixed - some already in the Silverlight it self (GDR2 release), some directly in our own code. 

Kind regards,
Vlad
the Telerik team

[Kjell]

Thanks I think I'm on my way to resolving this, I'v at least isolated the problem to a couple radcombo boxes in my grid.

[Kjell]

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