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https://issues.apache.org/jira/browse/PDFBOX-4058?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16316744#comment-16316744
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Tilman Hausherr commented on PDFBOX-4058:
-----------------------------------------
If you can build from source, you can disable the tiling cache by commenting
this line
{code:java}
weakCache.put(tilingPaintParameter, paint);
{code}
in the {{TilingPaintFactory}} class. Then it works with 2700 MB on jdk8, and
with 2GB on jdk9.
> High memory consumption when extracting image from PDF file
> -----------------------------------------------------------
>
> Key: PDFBOX-4058
> URL: https://issues.apache.org/jira/browse/PDFBOX-4058
> Project: PDFBox
> Issue Type: Bug
> Components: Rendering
> Affects Versions: 2.0.5, 2.0.6, 2.0.7, 2.0.8
> Environment: windows 10 / Linux
> Reporter: Bjorn Misseghers
> Labels: regression
> Attachments: HighMemoryFootprint.pdf
>
>
> When rendering an image at 300 dpi from the included PDF, my java process
> uses a huge amount of memory.
> The document is only 45 Kb in size and contains 2 pages, my JVM is unable to
> extract even 1 page with 3G of memory. Setting Xmx to 4G works but is not the
> solution I want.
> The error occurs when calling PDFRenderer.renderImageWithDPI()
> I already tried tweaking the memory usage in my application to use a scratch
> file while loading the document as well as avoiding caching of XObjects as
> described here: https://pdfbox.apache.org/2.0/faq.html#outofmemoryerror
> These didn't work.
> The issue can be reproduced using the pdfbox-app utility:
> java -Xmx3G -jar pdfbox-app-2.0.8.jar PDFToImage
> HighMemoryFootprint.pdf -dpi 300 -color RGB -page 1
> What can not be changed?
> * 300 dpi will not be decreased.
> * Max Java memory will not be increased: 3GB is ridiculous for a 45kb PDF
> file.
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