Memory consumption on large collection

[Dror]

Hello
     We've noticed on our application that showing a grid for large collections causese the application to use huge ammount of memory and throw OutOfMemory exception.

We've created a demo project cotaining 5 million enties containing two string.
Creating the data context raised memory consumption of the application to 450MB.
Showing the window containing the RadGridView raised memory consumption to 800MB.
All grid rows are set, no infinity/auto exists.

Any ideas?

[Dimitrina]

Hello,

I can suggest you going through our online documentation on possible reasons why there would be degraded performance with RadGridView.

Let me know if any of the points listed there help.

Regards,
Didie
Telerik

 

 

[Dror]

As far as I can see all the reported issues don't exist in our project

this is the xaml we are using:
<Window x:Class="ManyStudents.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation"
Title="MainWindow" Height="350" Width="525">
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="250"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="400"/>
</Grid.ColumnDefinitions>
<telerik:RadGridView ItemsSource="{Binding AllStudents}" GroupRenderMode="Flat" Grid.Row="0" />
</Grid>
</Window>

Thanks
   Dror

[Dimitrina]

Hi Dror,

Indeed, it seems so.

Generally RadGridView supports UI Virtualization and only the items in the View area should be actually realized. As you have not placed your GridView under a container that measures it with infinity, then it is not expected to run out of memory.

May I ask you to share what is the version of RadControls you use? Furthermore, would you please test referencing ImplicitStyles and NoXaml binaries?

Regards,
Didie
Telerik

 

 

[Dror]

I've tested it with several versions, q2 2013 and q1 2014.


I've tested with NoXaml and ImplicitStyles and got the same results

Thanks
    Dror

[Dimitrina]

Hello Dror,

May I ask you to send me a demo solution with your specific setup where I can observe the issue? You can take a look at this blog post for a reference on how to isolate an issue. 

Regards,
Didie
Telerik

 

 

[Dror]

How do I send files through the forum?

[Dimitrina]

Hello,

You can open a new support ticket and attach it there. 

Regards,
Didie
Telerik