Yeah but it should free most of the stuff.

It would be worth testing whether is an OutOfMemory if you open and close the document a lot of times.

If no => then don't bother.

If yes => please test whether the problem is gone with jdk11 or jdk14, if not, please share the file.

(I assume you are using PDFBox 2.0.19)

Tilman

Am 25.03.2020 um 11:17 schrieb Hesham Gneady:
I think it's because the book I'm testing is 400 MB in size, and it has more 
than 9500 pages of OCRed content :)


Best regards,
Hesham

--------------------------------------------------------------------------------------------------
Included Message:

Hi,

That is a good version.

Yes I'm surprised with the results. There is some permanent stuff, but I didn't 
expect it to be that high (58 MB).
However a real memory leak could be proven (somewhat) only by running that open 
and close several times.

Tilman

Am 24.03.2020 um 20:24 schrieb Hesham Gneady:
It's 8u231
Do you see something wrong with the results?


Best regards,
Hesham

-----Original Message-----
From: Tilman Hausherr [mailto:thaush...@t-online.de]
Sent: Tuesday, March 24, 2020 8:10 PM
To: users@pdfbox.apache.org
Subject: Re: Consumed memory after closing PDDocument

Which one? (Exact version)

I'm asking just to check that you haven't an old one, e.g. 40.

Tilman


Am 24.03.2020 um 17:26 schrieb Hesham Gneady:
JDK 8.0


Best regards,
Hesham

---------------------------------------------------------------------
-
----------------------------
Included Message:

What jdk are you using?

Tilman

Am 24.03.2020 um 17:15 schrieb Hesham Gneady:
Oh! ... That's absolutely right. I am now getting right results:

1. Heap before Loading PDF Doc:
Current heap size: 265289728
Free heap size: 212918368
--------------------------------
2. Heap after loading the PDF Doc:
Current heap size: 908066816
Free heap size: 342499608
--------------------------------
3. Heap after closing the PDF Doc:
Current heap size: 908066816
Free heap size: 849820016
--------------------------------


Best regards,
Hesham


-----Original Message-----

Memory is only freed after a GC run. You Need to invoke that explicitly.

Am 24.03.2020 um 14:40 schrieb Hesham Gneady <heshamgne...@gmail.com>:

´╗┐Hello,



I am trying to make a test to see the amount of memory consumed
before and after loading a PDF file using PDFBox, and also the
consumed memory after closing the PDF file, but I've noticed that
the memory consumed after loading the PDF file is the same after
closing the PDF file. It seems that i am doing something wrong, or
that the PDF is still loaded in memory! . Here is the code I'm using:



private String docPath = "c:\400mb.pdf"



public void loadPDFDocument() {

                printHeap( "1. Heap before Loading PDF Doc:" );



                PDDocument document = null;

                try {

                              document = PDDocument.load(new
File(docPath));

                              printHeap( "2. Heap after loading the PDF Doc:"
);

                } catch (IOException e) {

                              throw new RuntimeException(e);

                } finally {

                              if (document != null) {

                                           try {

document.close();

                                                        printHeap( "3.
Heap after closing the PDF Doc:" );

                                           } catch (IOException e) {

e.printStackTrace();

                                           }

                              }

                }

}





public void printHeap( String title ) {

                long heapSize = Runtime.getRuntime().totalMemory();

                long heapFreeSize =
Runtime.getRuntime().freeMemory();



                System.out.println( title );

                System.out.println( "Current heap size: " + heapSize
);

                System.out.println( "Free heap size: " +
heapFreeSize );

                System.out.println( "--------------------------------"
);

}



The output for this code when calling loadPDFDocument() is:

1. Heap before Loading PDF Doc:

Current heap size: 265289728

Free heap size: 203194096

--------------------------------

2. Heap after loading the PDF Doc:

Current heap size: 899153920

Free heap size: 343428432

--------------------------------

3. Heap after closing the PDF Doc:

Current heap size: 899153920

Free heap size: 343428432

--------------------------------



Am I doing something wrong here?





Best regards,

Hesham



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