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From Andreas Lehmkühler <andr...@lehmi.de>
Subject Re: Re[2]: PDFRenderer, PDDocument memory issue
Date Wed, 01 Jul 2015 11:04:53 GMT


> Alex Sviridov <ooo_saturn7@mail.ru> hat am 1. Juli 2015 um 12:58 geschrieben:
> 
> 
>  Thank you for answer. I tried pdfbox-app-2.0.0-20150630.220424-1464.jar the
> result is the same.
> 
> When I create images I add them to javafx FlowPane. However, the problem is
> not in images because I repeat - I get 400mb when I do
> pdfDocument=null,pdfRenderer=null.
> 
> Bedised, when I do pdfDocument = PDDocument.load(new File(fileName)) I don't
> have any problems with memory. 
> 
> I'm getting problem with memory when I run in for loop getPageThumbImage.
> 
> I am sure that the problem is in PdfBox. Please, help me.
Maybe, but I'm not sure at all.

Try to use the scratch file.

> Среда,  1 июля 2015, 12:48 +02:00 от Andreas Lehmkühler <andreas@lehmi.de>:
> >
> >
> >> Alex Sviridov < ooo_saturn7@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
> >
> >---------------------------------------------------------------------
> >To unsubscribe, e-mail:  users-unsubscribe@pdfbox.apache.org
> >For additional commands, e-mail:  users-help@pdfbox.apache.org
> >
> 
> 
> -- 
> Alex Sviridov

BR
Andreas

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