> Alex Sviridov <ooo_satu...@mail.ru> hat am 1. Juli 2015 um 10:16 geschrieben:
>
>
> I want to display all page thumbnails. However I came across memory size
> problem with PDFRenderer or PDDocument - I don't know which one.
>
> I have the following code:
> ....
> private PDDocument pdfDocument;
>
> private PDFRenderer pdfRenderer;
>
> public WritableImage getPageThumbImage(int page){
> WritableImage result=null;
> try {
> BufferedImage bi=pdfRenderer.renderImageWithDPI(page, 12,
> ImageType.RGB);
> result=SwingFXUtils.toFXImage(bi, null);
> } catch (IOException ex) {
> ....
> }
> return result;
> }
> .....
> The method getPageThumbImage I run in for loop for every page.I set java
> memory heap to 500mb.
> And I can get about 30 images using getPageThumbImage (if I set more memory I
> get more).
> In my application I have real time memory graphs and they show that memory is
> very fast filled.
> When there is no more free memory getPageThumbImage hangs - no exception,
> nothing. But the code stops.
> When I do pdfDocument=null,pdfRenderer=null I get about 400mb free memory. How
> to solve this problem?
There are 2 possible issues and maybe both are relevant.
1. PDFBox consumes more or less memory to load a pdf depending on the size and
the content of the pdf.
- Are you using the latest 2.0.0-SNAPSHOT? There were some improvements
concerning the memory footprint lately
- Try to use of a scratch file (there are load methods including a boolean
switcht ot activate that)
2. Your own implementation consumes more or less memory to process those
thumbnails
- check if you are releasing all resources (ecspecially those images you're
creating) you are using during your process
HTH,
Andreas
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