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Subject: Re: [docbook-apps] Using DocBook Stylesheets and Java Heap Problems

Hi Bob,

I analyzed the problem by splitting the whole generation chain like
you suggested.

The problem occurs when the Apache FO processor does the
transformation to PDF. After contacting the Apache FO mailinglist I
know what my problem is, but not how to solve it.

Adrian Cumiskey from the Apache FO mailinglist pointed out to check if
I use "many" page sequences in the resulting FO document, because FOP
processes documents by page sequence. Thus if I can section the
document contents into lots of small page sequence segments this can
help a lot with memory consumption.

So I checked the generated FO documents (size from 300kb to 20mb) and
noticed that there is really one single page sequence that wrapps all
the content.

=> Thus my question is => is there a way to change this behaviour and
how would it influence the look of my document?

I am exporting in article style using a own page sequence master in
the customization layer.


On Fri, May 1, 2009 at 7:40 PM, Bob Stayton <bobs@sagehill.net> wrote:
> Hi,
> Are you using FOP to apply the XSL stylesheet as well as converting the
> XSL-FO to PDF?  If so, you might try splitting those functions by first
> generating an FO file with Saxon or such, and then processing the FO file
> with FOP.  That would at least tell you which step was having the problem.
> Bob Stayton
> Sagehill Enterprises
> bobs@sagehill.net
> ----- Original Message ----- From: "Tobias Anstett [k15t.com]"
> <tobias@k15t.com>
> To: "docbook-apps" <docbook-apps@lists.oasis-open.org>
> Sent: Friday, May 01, 2009 10:02 AM
> Subject: [docbook-apps] Using DocBook Stylesheets and Java Heap Problems
>> Hi,
>> we are using the DocBook stylesheets in combination with Apache FOP
>> inside a web app. I already assigned more than 1024m to -Xms and -Xmx
>> but some (large) DocBook to PDF conversions still cause Java Heap
>> Exceptions. Is there a way to reduce the consumed memory ?
>> Cheers,
>> Tobias
>> ---------------------------------------------------------------------
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