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Re: [xsl] FOP : consumption memory
2014-08-16 06:38:32
I’m not a FOP expert, but can’t you separate the pass(es) that generate the
index, resolve cross-refs, etc., from the pass that actually layouts the FO
representation? By separate I mean make it separate Java invocations, storing
intermediate results as files.
On August 16, 2014 1:04:46 PM CEST, "Eliot Kimber
ekimber(_at_)contrext(_dot_)com"
<xsl-list-service(_at_)lists(_dot_)mulberrytech(_dot_)com> wrote:
I see: the two-column layout means there are no natural breakpoints in
the
content before the index. The index has break points but by then it
might
be too late. The back-of-the-book index could also be
contributing--it's
quite long and FOP may need to keep the entire area tree in memory in
order to then resolve the index references.
As Peter says, I would suspect a naive implementation on FOP's part (I
haven't looked at the code). Would be useful to try both RenderX XEP
and
Antenna House XSL Formatter--I'm sure they would both do better. If
your
project can bear the cost, either product would be a good investment.
Cheers,
Eliot
—————
Eliot Kimber, Owner
Contrext, LLC
http://contrext.com
On 8/16/14, 2:26 AM, "Jean-Pierre Lamon jpl(_at_)ngscan(_dot_)com"
<xsl-list-service(_at_)lists(_dot_)mulberrytech(_dot_)com> wrote:
Thank you for your response Eliot.
I don't know if I can share these files, I must ask the principal
because
it's a mandate.
The result is under :
http://www.ngscan.com/ezpump/BibVS.pdf
I'll let you know
Regards
JP
-----Message d'origine-----
De : Eliot Kimber ekimber(_at_)contrext(_dot_)com
[mailto:xsl-list-service(_at_)lists(_dot_)mulberrytech(_dot_)com]
Envoyé : vendredi 15 août 2014 23:44
À : xsl-list
Objet : Re: [xsl] FOP : consumption memory
If your content has natural page breaks (meaning elements that always
start a new page) you can always start a new page sequence at that
point.
If your content does not have such nature page breaks then of course
you
can't. In that case, one solution would be to generate the
intermediate
area tree (a feature of FOP and all the other FO engines) and then use
it
to find elements that happen to start on new pages and regenerate the
FO
with page sequences started at those points. But that seems like
rather a
lot of effort.
It might be easier to just give the Java VM running FOP more memory.
If this is XML that can be shared publicly I'd be interested in
helping
diagnose this issue in exchange for the ability to use the XML for
demos.
Cheers,
Eliot
—————
Eliot Kimber, Owner
Contrext, LLC
http://contrext.com
On 8/15/14, 1:32 PM, "Jean-Pierre Lamon jpl(_at_)ngscan(_dot_)com"
<xsl-list-service(_at_)lists(_dot_)mulberrytech(_dot_)com> wrote:
Thx Geert but I can't spread and break pages. It's a bibliography
(swiss
national library bibliography).
If someone wants the XML and XSL to test, no problem :-) I'm not very
professional with XSL, I maybe have done some horrors in my
stylesheets
but
my question is only : why FOP hangs and the little tool works
perfectly.
With absolute respect for people working for free tools like FOP.
-----Message d'origine-----
De : Geert Bormans geert(_at_)gbormans(_dot_)telenet(_dot_)be
[mailto:xsl-list-service(_at_)lists(_dot_)mulberrytech(_dot_)com]
Envoyé : vendredi 15 août 2014 17:12
À : xsl-list(_at_)lists(_dot_)mulberrytech(_dot_)com
Objet : Re: [xsl] FOP : consumption memory
Hi,
In my experience FOP does a poor thing with long page sequences.
It seems to keep them in memory (for repagination maybe?) completely
Memory footprint for FOP goes down dramatically
if you have a logic that cuts the pages
Rather than using mechanisms such as break before
or similar, create new page sequences when you can
(eg. per chapter, ...)
That has helped me in the past
Cheers
Geert
At 16:33 15/08/2014, you wrote:
Hi All,
I know, difficult to say without having the
source, but could someone explain me why FOP
crashes, hangs (memory ?) for relative big
documents and a free small tool like XML2PDF
render the PDF perfectly and this, dramatically quicker compare to
FOP.
I’ve tried to play with JAVA memory etc…> no way.
Thanks and regards
JP
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