You can use direct content and high level objects. In this case you just need to break the table in several smaller tables.
Paulo ----- Original Message ----- From: "Sam Green" <[EMAIL PROTECTED]> To: "Post all your questions about iText here" <itext-questions@lists.sourceforge.net> Sent: Monday, December 11, 2006 1:43 PM Subject: Re: [iText-questions] Memory usage > Thank Paulo, > > It seems strange to me that the massive leap in memory usage occurs when > the PdfPTable is added to the document, rather than when the large > complex PdfPTable is created. But I guess it's feasible that writing > to the PDF document requires an extra proportional amount of memory > resources to the size of the object being written. Would that be > correct? > > Looks as though I'm going to have to start delving into the direct > content more and more! *gulp* > > Thanks again, > Sam. > > > > Paulo Soares wrote: >> See >> http://itextdocs.lowagie.com/tutorial/objects/tables/pdfptable/index.html#memory >> >> Paulo >> ----- Original Message ----- >> From: "Sam Green" <[EMAIL PROTECTED]> >> To: "iText Mailing List" <itext-questions@lists.sourceforge.net> >> Sent: Monday, December 11, 2006 1:05 PM >> Subject: [iText-questions] Memory usage >> >> >> >>> Hi there, >>> >>> I'm having some issues with the amount of memory PDF generation is >>> using, and I'd just like to run it past you to see if you have any ideas >>> as to the best way to tackle it! >>> >>> I'm running this as part of a tomcat application. >>> >>> I'm using the following code to open up the file and write the data: >>> >>> Document document = new Document(); >>> PdfWriter writer = PdfWriter.getInstance( document, new >>> FileOutputStream( temporaryFileName )); >>> document.open(); >>> // Add a title page first. >>> .. >>> // Add main pages. >>> PdfPTable table = getPDFRendering(); >>> document.add( table ); >>> document.close(); >>> >>> >>> getPDFRendering() is generating a few nested PdfPTables with the >>> occassionally text Chunk, with a large PdfPTable at its core. >>> This data table contains 500-1000 rows of ~30 columns (each cell >>> containing, typically, an integer). I am also using an extra empty cell >>> between each cell for spacing (I am reusing my 'blank cell' object for >>> each of these empty cells). >>> >>> while watching 'top' when the 'document.add' line gets executed, the >>> memory usage of tomcat increases by ~500mb. >>> >>> There are a few points I thought of: >>> - That's alot of data. However, I'd like to find ways of being able to >>> generate the PDF while trying to control the memory usage. >>> - Extra empty cell for spacing might be a bit retarded, is there some >>> 'cell padding' i can add to the PdfPTable? >>> - Is there something odd adding to the overhead? E.g. having a large >>> table inside a bunch of nested tables? >>> - Would it be better on memory to, instead of creating the table and >>> then adding it to the document, pass the document into the method that >>> generates the main table and do the following: >>> >>> document.add( table ); >>> ... >>> for( int i=0; i<rows; i++ ) { >>> for( int j=0; j<cells_in_row; j++ ) { >>> table.addCell( blah ); >>> } >>> } >>> ... >>> >>> Would any of these ideas help substantially? Is there anything else I >>> can try? >>> >>> >>> Thanks for your help, >>> Sam. >>> >>> >>> ------------------------------------------------------------------------- >>> Take Surveys. Earn Cash. Influence the Future of IT >>> Join SourceForge.net's Techsay panel and you'll get the chance to share >>> your >>> opinions on IT & business topics through brief surveys - and earn cash >>> http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV >>> _______________________________________________ >>> iText-questions mailing list >>> iText-questions@lists.sourceforge.net >>> https://lists.sourceforge.net/lists/listinfo/itext-questions >>> Buy the iText book: http://itext.ugent.be/itext-in-action/ >>> >> >> >> ------------------------------------------------------------------------- >> Take Surveys. Earn Cash. Influence the Future of IT >> Join SourceForge.net's Techsay panel and you'll get the chance to share >> your >> opinions on IT & business topics through brief surveys - and earn cash >> http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV >> _______________________________________________ >> iText-questions mailing list >> iText-questions@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/itext-questions >> Buy the iText book: http://itext.ugent.be/itext-in-action/ >> > > -- > > Sam Green > Flextrade UK > (44) 0207 796 3001 > 8 Fredericks Place > London EC2R 8AB > > This communication is for informational purposes only. The contents of > this > transmission are confidential and intended solely for the use of the > individual or entity to whom they are addressed.If you have received this > email in error please notify the sender by return email and delete this > message from your system. > > Flextrade Systems Inc., its subsidiaries and affiliates do not guarantee > the > completeness and accuracy of this transmission's contents. Moreover, > Flextrade Systems Inc., its subsidiaries and affiliates do not guarantee > this communication to be free of viruses and accept no liability for any > damage caused thereof. > > > > -------------------------------------------------------------------------------- > ------------------------------------------------------------------------- > Take Surveys. Earn Cash. 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Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ iText-questions mailing list iText-questions@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/itext-questions Buy the iText book: http://itext.ugent.be/itext-in-action/
