problem big files >1Mo

Hello!
I read e-mails on the problems of crash and slowness on big files > 1Mo
And apparently there are not too many solutions
Maybe being resolved in the next version ?
At present I have that a "page - sequence" for all the document.
According to the users of FOP, it's necessary of some "fo:page-sequence" to
reduce the slowness.
How to insert "page-sequence" everything 20 rows in xsl?
(Without inserting syntaxe <page> in my xml)
Are there other solutions?
My files xml are structured as follows:
<row num="1">
  <CODLT>0000045393</CODLT>
  <DATINT>1996-01-02 00:00:00.0</DATINT>
  <CODCLI>99001</CODCLI>
  <CODPROD>SI</CODPROD>
  <CODDOSS>1</CODDOSS>
  <DUREE_HHCC>8</DUREE_HHCC>
  <INTERLOC />
  </row>
<row num="2">
  <CODLT>0000045394</CODLT>
  <DATINT>1996-01-03 00:00:00.0</DATINT>
  <CODCLI>99001</CODCLI>
  <CODPROD>SI</CODPROD>
  <CODDOSS>1</CODDOSS>
  <DUREE_HHCC>8</DUREE_HHCC>
  <INTERLOC />
</row>



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