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
>
>
>
---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscr...@pdfbox.apache.org
For additional commands, e-mail: users-h...@pdfbox.apache.org
