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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