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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