A DESCRIPTION OF THE PROBLEM :
My application uses canvases to draw diagrams, placed in multiple tab panes. On wide screen monitors, after creating more than 10 tabs I got exceptions like below. I think this comes from the Canvas high video memory usage.

My question is, if is any way to release the Canvas memory usage. I would trigger this for the canvases in the un-selected tabs in the tab pane. I tried to do canvas.setSize(0,0), but this seems not to work always. It would be great if this would work on canvas.setDisable(true).

java.lang.NullPointerException: Cannot invoke "com.sun.prism.RTTexture.createGraphics()" because "<local9>" is null
    at com.sun.javafx.sg.prism.NGCanvas$RenderBuf.validate(NGCanvas.java:214)
    at com.sun.javafx.sg.prism.NGCanvas.initCanvas(NGCanvas.java:644)
    at com.sun.javafx.sg.prism.NGCanvas.renderContent(NGCanvas.java:607)
    at com.sun.javafx.sg.prism.NGNode.doRender(NGNode.java:2072)
    at com.sun.javafx.sg.prism.NGNode.render(NGNode.java:1964)
    at com.sun.javafx.sg.prism.NGGroup.renderContent(NGGroup.java:270)
    at com.sun.javafx.sg.prism.NGRegion.renderContent(NGRegion.java:579)
    at com.sun.javafx.sg.prism.NGNode.doRender(NGNode.java:2072)
    at com.sun.javafx.sg.prism.NGNode.render(NGNode.java:1964)
    at com.sun.javafx.sg.prism.NGGroup.renderContent(NGGroup.java:270)
    at com.sun.javafx.sg.prism.NGRegion.renderContent(NGRegion.java:579)
    at com.sun.javafx.sg.prism.NGNode.doRender(NGNode.java:2072)
    at com.sun.javafx.sg.prism.NGNode.render(NGNode.java:1964)
    at com.sun.javafx.sg.prism.NGGroup.renderContent(NGGroup.java:270)
    at com.sun.javafx.sg.prism.NGRegion.renderContent(NGRegion.java:579)
    at com.sun.javafx.sg.prism.NGNode.doRender(NGNode.java:2072)
    at com.sun.javafx.sg.prism.NGNode.render(NGNode.java:1964)
    at com.sun.javafx.sg.prism.NGGroup.renderContent(NGGroup.java:270)
    at com.sun.javafx.sg.prism.NGRegion.renderContent(NGRegion.java:579)
    at com.sun.javafx.sg.prism.NGNode.doRender(NGNode.java:2072)
    at com.sun.javafx.sg.prism.NGNode.render(NGNode.java:1964)
    at com.sun.javafx.sg.prism.NGGroup.renderContent(NGGroup.java:270)
    at com.sun.javafx.sg.prism.NGRegion.renderContent(NGRegion.java:579)
    at com.sun.javafx.sg.prism.NGNode.renderForClip(NGNode.java:2313)
    at com.sun.javafx.sg.prism.NGNode.renderRectClip(NGNode.java:2207)
    at com.sun.javafx.sg.prism.NGNode.renderClip(NGNode.java:2233)
    at com.sun.javafx.sg.prism.NGNode.doRender(NGNode.java:2066)
    at com.sun.javafx.sg.prism.NGNode.render(NGNode.java:1964)
    at com.sun.javafx.sg.prism.NGGroup.renderContent(NGGroup.java:270)
    at com.sun.javafx.sg.prism.NGRegion.renderContent(NGRegion.java:579)
    at com.sun.javafx.sg.prism.NGNode.doRender(NGNode.java:2072)
    at com.sun.javafx.sg.prism.NGNode.render(NGNode.java:1964)
    at com.sun.javafx.sg.prism.NGGroup.renderContent(NGGroup.java:270)
    at com.sun.javafx.sg.prism.NGRegion.renderContent(NGRegion.java:579)
    at com.sun.javafx.sg.prism.NGNode.renderForClip(NGNode.java:2313)
    at com.sun.javafx.sg.prism.NGNode.renderRectClip(NGNode.java:2207)
    at com.sun.javafx.sg.prism.NGNode.renderClip(NGNode.java:2233)
    at com.sun.javafx.sg.prism.NGNode.doRender(NGNode.java:2066)
    at com.sun.javafx.sg.prism.NGNode.render(NGNode.java:1964)
    at com.sun.javafx.sg.prism.NGGroup.renderContent(NGGroup.java:270)
    at com.sun.javafx.sg.prism.NGRegion.renderContent(NGRegion.java:579)
    at com.sun.javafx.sg.prism.NGNode.renderForClip(NGNode.java:2313)
    at com.sun.javafx.sg.prism.NGNode.renderRectClip(NGNode.java:2207)
    at com.sun.javafx.sg.prism.NGNode.renderClip(NGNode.java:2233)
    at com.sun.javafx.sg.prism.NGNode.doRender(NGNode.java:2066)
    at com.sun.javafx.sg.prism.NGNode.render(NGNode.java:1964)
    at com.sun.javafx.sg.prism.NGGroup.renderContent(NGGroup.java:270)
    at com.sun.javafx.sg.prism.NGRegion.renderContent(NGRegion.java:579)
    at com.sun.javafx.sg.prism.NGNode.renderForClip(NGNode.java:2313)
    at com.sun.javafx.sg.prism.NGNode.renderRectClip(NGNode.java:2207)
    at com.sun.javafx.sg.prism.NGNode.renderClip(NGNode.java:2233)
    at com.sun.javafx.sg.prism.NGNode.doRender(NGNode.java:2066)
    at com.sun.javafx.sg.prism.NGNode.render(NGNode.java:1964)
    at com.sun.javafx.sg.prism.NGGroup.renderContent(NGGroup.java:270)
    at com.sun.javafx.sg.prism.NGRegion.renderContent(NGRegion.java:579)
    at com.sun.javafx.sg.prism.NGNode.doRender(NGNode.java:2072)
    at com.sun.javafx.sg.prism.NGNode.render(NGNode.java:1964)
    at com.sun.javafx.sg.prism.NGGroup.renderContent(NGGroup.java:270)
    at com.sun.javafx.sg.prism.NGRegion.renderContent(NGRegion.java:579)
    at com.sun.javafx.sg.prism.NGNode.renderForClip(NGNode.java:2313)
    at com.sun.javafx.sg.prism.NGNode.renderRectClip(NGNode.java:2207)
    at com.sun.javafx.sg.prism.NGNode.renderClip(NGNode.java:2233)
    at com.sun.javafx.sg.prism.NGNode.doRender(NGNode.java:2066)
    at com.sun.javafx.sg.prism.NGNode.render(NGNode.java:1964)
    at com.sun.javafx.sg.prism.NGGroup.renderContent(NGGroup.java:270)
    at com.sun.javafx.sg.prism.NGRegion.renderContent(NGRegion.java:579)
    at com.sun.javafx.sg.prism.NGNode.renderForClip(NGNode.java:2313)
    at com.sun.javafx.sg.prism.NGNode.renderRectClip(NGNode.java:2207)
    at com.sun.javafx.sg.prism.NGNode.renderClip(NGNode.java:2233)
    at com.sun.javafx.sg.prism.NGNode.doRender(NGNode.java:2066)
    at com.sun.javafx.sg.prism.NGNode.render(NGNode.java:1964)
    at com.sun.javafx.sg.prism.NGGroup.renderContent(NGGroup.java:270)
    at com.sun.javafx.sg.prism.NGRegion.renderContent(NGRegion.java:579)
    at com.sun.javafx.sg.prism.NGNode.renderForClip(NGNode.java:2313)
    at com.sun.javafx.sg.prism.NGNode.renderRectClip(NGNode.java:2207)
    at com.sun.javafx.sg.prism.NGNode.renderClip(NGNode.java:2233)
    at com.sun.javafx.sg.prism.NGNode.doRender(NGNode.java:2066)
    at com.sun.javafx.sg.prism.NGNode.render(NGNode.java:1964)
    at com.sun.javafx.sg.prism.NGGroup.renderContent(NGGroup.java:270)
    at com.sun.javafx.sg.prism.NGRegion.renderContent(NGRegion.java:579)
    at com.sun.javafx.sg.prism.NGNode.doRender(NGNode.java:2072)
    at com.sun.javafx.sg.prism.NGNode.render(NGNode.java:1964)
    at com.sun.javafx.sg.prism.NGGroup.renderContent(NGGroup.java:270)
    at com.sun.javafx.sg.prism.NGRegion.renderContent(NGRegion.java:579)
    at com.sun.javafx.sg.prism.NGNode.doRender(NGNode.java:2072)
    at com.sun.javafx.sg.prism.NGNode.render(NGNode.java:1964)
    at com.sun.javafx.tk.quantum.ViewPainter.doPaint(ViewPainter.java:480)
    at com.sun.javafx.tk.quantum.ViewPainter.paintImpl(ViewPainter.java:321)
    at com.sun.javafx.tk.quantum.PresentingPainter.run(PresentingPainter.java:92)
    at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
    at java.base/java.util.concurrent.FutureTask.runAndReset(FutureTask.java:305)
    at com.sun.javafx.tk.RenderJob.run(RenderJob.java:58)
    at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130)
    at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
    at com.sun.javafx.tk.quantum.QuantumRenderer$PipelineRunnable.run(QuantumRenderer.java:126)
    at java.base/java.lang.Thread.run(Thread.java:832)