I think you might be hitting a known performance problem with the PDF export.
There are a couple of options to improve the situation:
I hope this helps
UPDATE: The upgrade to v5.3 aided in speeding up the conversion process, which still breaks. However, I found out it is breaking due to some formatting issues in addition to the size of the space (400+ pages), because it works in smaller chunks. Still, it works faster now and it does output PDF files. I am happy to say that I was able to identify the formatting issue and should have full space PDFs output soon. Thanks again for the help!
Too many indentations. I have to go back through the docs and reformat. I had copied and pasted whole sections from our online source and it copied in metadata that added numerous indentations. I will be revisiting that document this month, and if I think of it I will comment here about whether it is fixed.
Many THX for your quick answer - your help is very much appreciated. :-) For some strange reason today my export was successful after 3 hours (pdf size: 526 MB for 2539 pages)...without any heap size changes. We will test Olli's heap size solution anyway to test performance. (Confluence 5.1.3)
@Pit Fischer Know it's been a long time, but did the export hang at 50% for most of those three hours? I'm trying to figure out if I should give up and plan a restart or not. I've been at 50% and on page 1 for over an hour. I've 16G on the heap with 33% free running confluence 5.8.6. My guess is that some temp file blocks successful export. I'm waiting to hear back from Atlassian support before scheduling a restart.
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