OutOfMemoryError: gc overhead limit exceeded

[dsp85103]

When I generate a big pdf (it's a report, about 150,000~200,000 row data)
Because I need to add statistics data, so I create Row & Cell by manual to custom my report

But I creating Row & Cell before drawtable, the ram direct up to ~3G from 400MB
then I call draw(), Java throws the OutOfMemoryError exception...
My JVM only setting 4G available memory..

Any one know how to improve this issue?
Thanks

btw. I am not english native speaker ;) Maybe some semantics wrong ...

[dsp85103]

here is my create row and cell example code
`
Row row = baseTable.createRow(10.f);
Cell cell;
cell = row.createCell(contentColWidth.get("name1"), df.format(totalModel.getName1()), HorizontalAlignment.CENTER, VerticalAlignment.MIDDLE);
cell.setFont(font);
cell.setFontSize(fontSize);

DecimalFormat df = new DecimalFormat(",###");

cell = row.createCell(contentColWidth.get("val1"), df.format(totalModel.getValue1()), HorizontalAlignment.RIGHT, VerticalAlignment.MIDDLE);
cell.setFont(font);
cell.setFontSize(fontSize);

cell = row.createCell(contentColWidth.get("val2"), df.format(totalModel.getValue2()), HorizontalAlignment.RIGHT, VerticalAlignment.MIDDLE);
cell.setFont(font);
cell.setFontSize(fontSize);

cell = row.createCell(contentColWidth.get("val3"), df.format(totalModel.getValue3()), HorizontalAlignment.RIGHT, VerticalAlignment.MIDDLE);
cell.setFont(font);
cell.setFontSize(fontSize);

cell = row.createCell(contentColWidth.get("val4"), df.format(totalModel.getValue4()), HorizontalAlignment.RIGHT, VerticalAlignment.MIDDLE);
cell.setFont(font);
cell.setFontSize(fontSize);

... one row about have 20 column
`

And I use MAT tool to analyze the mem dump
I got this
https://i.imgur.com/xBjkGpC.png
this package use a lot of object cause mem full

[johnmanko]

@dsp85103 Can you provide a sample project?