XML DB: As XML file size doubles validate time more than doubles

Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64bi
We have default XMLDB install. I am using schemavalidate() to successfullly validate xml files against a registered xsd. For some reason as the files size doubles the time to validate the file grows at a faster rate than double? We wanted to generate approx 18MB files since they hold 5000 records. But as you can see it appears I would be better off generating six 3MB files instead. What init.ora or xdbconfig.xml parameter might I change to help out with behavior? Any other ideas of why this happening? Is this an example of "doesn't scale"?
1.5MB 3 Seconds
3MB 15 Seconds
6MB 1 Minute
12MB 6 Minutes
18MB 16 Minutes
Code is simple..
procedure validate_xml_file (p_dir in varchar2, p_file in varchar2) is
v_xmldoc xmltype;
begin
select XMLTYPE(bfilename(p_dir, p_file),NLS_CHARSET_ID('AL32UTF8'))
into v_xmldoc
from dual;
v_xmldoc.schemaValidate();
end validate_xml_file;

If I take the clause off the end of the cview table this procedure does not work at all.. It fails at the schemavalidate call...
Error report:
ORA-19030: Method invalid for non-schema based XML Documents.
ORA-06512: at "SYS.XMLTYPE", line 345
ORA-06512: at line 26
19030. 00000 - "Method invalid for non-schema based XML Documents."
*Cause: The method can be invoked on only schema based xmltype objects.
*Action: Don't invoke the method for non schema based xmltype objects.

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2 /
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SQL> --
SQL>
SQL>Also, if I do a WebDav or FTP put/get I do not see a problem either.
C:\TEMP>ftp
ftp> open localhost 2100
Connected to mdrake-lap.
220- mdrake-lap
Unauthorised use of this FTP server is prohibited and may be subject to civil and criminal prosecution
220 mdrake-lap FTP Server (Oracle XML DB/Oracle Database) ready.
User (mdrake-lap:(none)): scott
331 pass required for SCOTT
Password:
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Maximum XML file size that can parsed with c++ XML parser

Hi!
what is the maximum file size that can be parsed using the xml parser(version 1) for c++ on linux .
i'm getting an error(error no 231) when i try to parse an XML file of 3MB on Red Hat Linux 6.1
Regards
anjana

moving to xml db forum

XML DB: As XML file size doubles validate time more than doubles

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