Poor Performance generating pdf with Disco Viewer

Version: 10.1.2.54.25
Please humour me, I’m not a Discoverer friendly person.
Never even seen it.
But I am supporting a client who brings me Discoverer problems in the third person...
So issue is...
They often generate large reports.
Sometime, the users will export (not sure if that is correct term or not) them to pdf format.
This part of the process takes a while.
A 10,000 line/row report can take 25 minutes to generate in pdf.
Users are finding this unacceptable.
Excel generation for a similar report is done in approx 1.5 minutes.
Sorry, I can find nothing at Oracle sites, and a few things using google.
I can see that there are some client level controls in Disco that allows you to control resolution, memory, etc for pdf generation.
So..
1.     What exactly are all the related setting and what do these settings control.
2.     Are there any known issues for this?
3.     How is the pdf generated, this client process or server ? How can I describe this process to my client so that it can justify the difference between pdf & excel (assuming there is no known issue).
4.     Any good documents dealing with this (please don’t point me to user guides)
5. any other ideas, thoughts ?

Hi
Well if the same issue occurs in both Desktop and Viewer then you have your answer. It's not the way that Discoverer is running the workbook its the way the workbook has been constructed.
For a start, 40000 rows for a Crosstab is way over the top and WILL cause performance issues. This is because Discoverer has to create a bucket for every data point for every combination of items on the page, side and top axes. The more rows, page items and column headings that you have, the more buckets you have and therefore the longer it will take for Discoverer to work out the contents of every bucket.
Also, whenever you use page items or crosstabs, Discoverer has to retrieve all of the rows for the entire query, not just the first x rows as with a table. This is because it cannot possibly know how many buckets to create until it has all the rows.
You therefore to:
a) apply sufficient filters to reduce the amount of data being returned to something manageable
b) reduce the number of page items, if used
c) reduce the number of items on the side or top axis of a crosstab
d) reduce the number of complex calculations, especially calculations that would generate a new bucket
If you have a lot of complex calculations, you should consider the use of a materialized view / summary folder to pre-calculate the values.
Does this help?
Best wishes
Michael Armstrong-Smith
URL: http://learndiscoverer.com
Blog: http://learndiscoverer.blogspot.com

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From: Adobe Forums <[email protected]<mailto:[email protected]>>
Reply-To: "[email protected]<mailto:[email protected]>" <[email protected]<mailto:[email protected]>>
Date: Thu, 13 Oct 2011 11:02:42 -0700
To: Leonard Rosenthol <[email protected]<mailto:[email protected]>>
Subject: Can't open libHaru-generated PDF with Reader, other readers work.
Can't open libHaru-generated PDF with Reader, other readers work.
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