Hi Michael,
At 14.20 08/03/2007 +0100, Michael Schmidt wrote:
Hi everybody,
I've installed the latest (stable) version of Xerces, i.e.
libxerces-x.so.27. My OS is Ubuntu Linux 6.06LTS. I've built from
sources and installation seems to be fine. I have two questions:
1.) Xerces causes a runtime exception when executed on very large
XML files (5GB):
Fatal Error at file , line 0, char 0
Message: An exception occurred! Type:RuntimeException,
Message:The primary document entity could not be opened.
Id=/home/michael/research/cvs/cwprojection/experiments/xquery_xmark/xml/auction5000.xml
I had similar problems when using a self-written XML parser, but
easily fixed the problem by using fopen64() instead of fopen() to
open the input document. Is there any compile time option I can use
to support these large files? Or does anybody know how to fix this
problem? I did not yet try to change xerces source code...
If you want to try the fopen64 call, you should modify the
XMLPlatformUtils::openFile and XMLPlatformUtils::openFileToWrite
methods in <xerces-dir>/src/xercesc/util/Platforms/Linux/LinuxPlatformUtils.cpp
2.) Xerces by default uses the "-O" compile time option to generate
the librarises. Is there any benefit when using "-O3" instead?
I am not an expert of gcc and Linx, but I think somebody was worried
of aggressive optimizations; nothing stops you from editing
Makefile.incl to try a different set of flags.
Hope this helps,
Alberto
