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martink
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"Out of memory" exception
Feb 12th, 2014 at 8:22pm
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Hello,

I have a TreeLayout layout with no more than 100 nodes (shapes) and I get "Out of memory" exception. Is there some kind of optimization I need to do. I saw some previous posts about this "Out of memory" issue (http://mindfusion.eu/Forum/YaBB.pl?num=1364247675 and http://mindfusion.eu/Forum/YaBB.pl?num=1392052251/4#4) but it seems to me the scenarios are different (e.g. LayeredLayout instead of TreeLayout, hence no EnforceLinkFlow property found). Are there some best practices so I won't hit this limitation until the nodes are too many (let say 1000)? Should I use a certain ClientSideMode or a feature created especially for that case?

Thanks in advance,
Martin
  
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Stoyo
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Re: "Out of memory" exception
Reply #1 - Feb 13th, 2014 at 7:18am
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Hi,

Is there any TreeLayout code shown in the stack trace for the exception? If you use ImageMap mode, it's more likely the exception comes from the GDI+ API when the diagram bitmap becomes very large. If that's the case, set the DiagramView.MaxImageSize property.

I hope that helps,
Stoyan
  
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martink
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Re: "Out of memory" exception
Reply #2 - Feb 13th, 2014 at 7:56pm
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Hi Stoyan,

Thanks for your answer. I am using the "JavaApplet" client side mode (latest version). Attached is a screenshot with the Stack Trace. Any advice is welcomed.

Regards,
Martin
  
OutOfMemory.png (Attachment deleted)
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Stoyo
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Re: "Out of memory" exception
Reply #3 - Feb 14th, 2014 at 7:38am
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Hi,

This call stack contains only yours and System.Drawing code. It seems the DrawSystemsDiagram method tries to load a large bitmap, and the bitmap constructor throws an exception? Largest bitmaps that GDI+ can handle are about 3000 by 3000 pixels, and that same exception is the reason we have the MaxImageSize property. Are you trying to set that bitmap as a background image for the diagram?

I hope that helps,
Stoyan
  
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martink
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Re: "Out of memory" exception
Reply #4 - Feb 14th, 2014 at 9:18am
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Hi Stoyan,

May I ask you to take a look at the DrawSystemsDiagram method - it is attached. I believe this "out of memory" issue is the last blocker that I have. Once my client verifies the solution, I will buy your licence. Your components are really good and your support is outstanding.

Thanks,
Martin
  
DrawSystemsDiagram_method.txt (Attachment deleted)
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Stoyo
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Re: "Out of memory" exception
Reply #5 - Feb 14th, 2014 at 9:46am
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Hi,

Is that diagram_systems.png file very big? Even if it's not big, it might take a lot of memory if you assign it to many nodes. Note that each Bitmap instance you create in the "For Each systemTransf" loop has its own copy of the bitmap bytes. Instead of creating a new Bitmap for each node, try assigning a single shared Bitmap object to all nodes.

I hope that helps,
Stoyan
  
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martink
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Re: "Out of memory" exception
Reply #6 - Feb 14th, 2014 at 10:03am
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Hi,

The size of diagram_systems.png is 4KB. I will follow your advice about the bitmaps optimization and will let you know what the result is.

Thanks,
Martin
  
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martink
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Re: "Out of memory" exception
Reply #7 - Feb 15th, 2014 at 3:42pm
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Hi Stoyan,

I followed your advice and the issue is fixed.

Thanks,
Martin
  
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