PDfium memory consumption

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   I'm using PDFium renderer in my project

  var result = newPdfLibrary.SetPDFiumFileName(libraryFileName);
            if (result == 1)
            {
                int renderId = newPdfLibrary.SelectRenderer(4);
            }

and then RenderPageToString to render pdf document, but this results in huge memory consumption which is never released.

Do I need to call anything else to free the memmory?
DestroyRenderer and ReleaseLibrary have no effect.

regards

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pdfuserxx Members Profile Find Members Posts Beginner Joined: 05 Feb 16 Status: Offline Points: 18	Post Options Post Reply Quote pdfuserxx Report Post Thanks(0) Quote Reply Topic: PDfium memory consumption Posted: 10 Apr 20 at 9:53AM
	I'm using PDFium renderer in my project var result = newPdfLibrary.SetPDFiumFileName(libraryFileName); if (result == 1) { int renderId = newPdfLibrary.SelectRenderer(4); } and then RenderPageToString to render pdf document, but this results in huge memory consumption which is never released. Do I need to call anything else to free the memmory? DestroyRenderer and ReleaseLibrary have no effect. regards

Ingo Members Profile Find Members Posts Moderator Group Joined: 29 Oct 05 Status: Offline Points: 3530	Post Options Post Reply Quote Ingo Report Post Thanks(0) Quote Reply Posted: 10 Apr 20 at 2:33PM
	Hi, regarding the instance the library itself offers "free"...
	Cheers, Ingo

pdfuserxx Members Profile Find Members Posts Beginner Joined: 05 Feb 16 Status: Offline Points: 18	Post Options Post Reply Quote pdfuserxx Report Post Thanks(0) Quote Reply Posted: 16 Apr 20 at 6:54AM
	I'm already calling "ReleaseLibrary" which calls DPLReleaseLibrary and FreeLibrary but the memory is not being released. regards

Ingo Members Profile Find Members Posts Moderator Group Joined: 29 Oct 05 Status: Offline Points: 3530	Post Options Post Reply Quote Ingo Report Post Thanks(0) Quote Reply Posted: 16 Apr 20 at 8:03AM
	If it's a QuickPDF-issue: QuickPDF 16 and newer reduced memory consumption down to half. How big (pages) are your pdf-files? What's always better for bigger files is using the DA-functionality (but never mix DA- and Non-DA-functions). Here's a kb-document about how to use an external renderer: https://www.debenu.com/kb/use-rendering-printing-add-debenu-quick-pdf-library/ I think more that it's a PDFium-issue itself: Try Google with "PDFium release memory"... There's a lot.
	Cheers, Ingo

pdfuserxx Members Profile Find Members Posts Beginner Joined: 05 Feb 16 Status: Offline Points: 18	Post Options Post Reply Quote pdfuserxx Report Post Thanks(0) Quote Reply Posted: 16 Apr 20 at 9:13AM
	The page size is 3x2 inch and the file itself is approx 50 kb, but similar results can be observed with other pdf files. Sorry for the question, but what is DA functionality? May be but, I can only access PDFium functionality thru PDF functions. I'm using PDfium, because there ware same issues with default renderer. regards

Ingo Members Profile Find Members Posts Moderator Group Joined: 29 Oct 05 Status: Offline Points: 3530	Post Options Post Reply Quote Ingo Report Post Thanks(0) Quote Reply Posted: 16 Apr 20 at 10:38AM
	This small pdf won't be responsible for great memory consumption. I don't know your dev.language and you don't post the real code but if you've free the library itself the problem can only be the PDFium-handling itself. About DA-functionality: You're registered here for more than four years now and don't know the online resources?! Here for a common start: http://www.quickpdf.org/ Here to read about the direct access functionality (DA): https://www.debenu.com/docs/pdf_library_reference/FunctionGroups.php Here to search about anything regarding QuickPDF: https://www.debenu.com/docs/pdf_library_reference/Search.php Here you can choose your developer-guide: https://www.debenu.com/products/development/debenu-pdf-library/help/developer-guide/
	Cheers, Ingo

Ingo Members Profile Find Members Posts Moderator Group Joined: 29 Oct 05 Status: Offline Points: 3530	Post Options Post Reply Quote Ingo Report Post Thanks(0) Quote Reply Posted: 16 Apr 20 at 10:45AM
	In the developer guide you should read the chapter: Memory and direct access functions
	Cheers, Ingo

pdfuserxx Members Profile Find Members Posts Beginner Joined: 05 Feb 16 Status: Offline Points: 18	Post Options Post Reply Quote pdfuserxx Report Post Thanks(0) Quote Reply Posted: 17 Apr 20 at 9:59AM
	I'm using c#and usng debenu to convert pdf document to png , most of the files consist from single page. DA functions are not used as the application is working with in memory streams. The code is fairly simple: dynamic newPdfLibrary = new DebenuPDFLibraryDLL1711.PDFLibrary(librarypath); newPdfLibrary.SetPDFiumFileName(pdfiumdllpath); newPdfLibrary.SelectRenderer(4) //load the document from memory stream pdfLibrary.LoadFromString(ms.ToArray(), string.Empty) //select the document int documentID = pdfLibrary.SelectedDocument(); //render pdfLibrary.RenderPageToString(300, 1, 0); //cleanup pdfLibrary.RemoveDocument(documentID); pdfLibrary.DestroyRenderer(); pdfLibrary.ReleaseLibrary(); pdfLibrary = null; The problem is in RenderPageToString which calls DPLRenderPageToString where the memory leak occurs. regards

Ingo Members Profile Find Members Posts Moderator Group Joined: 29 Oct 05 Status: Offline Points: 3530	Post Options Post Reply Quote Ingo Report Post Thanks(0) Quote Reply Posted: 17 Apr 20 at 10:10AM
	"... The problem is in RenderPageToString which calls DPLRenderPageToString where the memory leak occurs. ..." and the render-function calls PDFium inside. Again: Try Google regarding memory consumption by PDFium. You can check it very easily if it's PDFium or the QP-function: Change your code and kick off PDFium - what's the result now... better? If you won't succeed with your trys you should ask the publishers of the library via the official support page.
	Cheers, Ingo