[Zope-dev] memory leak
Marco Nova
nova@tera-it.com
Wed, 11 Apr 2001 12:34:33 +0200
> -----Original Message-----
> From: Chris McDonough [mailto:chrism@digicool.com]
> Sent: mercoled=EC 11 aprile 2001 9.04
> To: Marco Nova; Zope-Dev (E-mail)
> Subject: Re: [Zope-dev] memory leak
>
> This looks like a potential bug in either ParsedXML or the=20
> code you're using
> to manipulate the components within ParsedXML.
>=20
> We'd like to find out! ;-) Do you think you can file a=20
> collector report
> with enough information in it to reproduce this behavior?
I can send you the code for the two external method I use, they only =
need a
webserver (that could be zope too) that serve an XML page (I can =
provide the
XML the methods needs) and the bunch of dtml methods I use to show the =
XML.
Anyway I will try to understand what's happening with ParsedXML and my =
code.
- mn
>=20
> ----- Original Message -----
> From: "Marco Nova" <nova@tera-it.com>
> To: "Zope-Dev (E-mail)" <zope-dev@zope.org>
> Sent: Wednesday, April 11, 2001 2:29 AM
> Subject: RE: [Zope-dev] memory leak
>=20
>=20
> > > have you checked the debug page in the control panel and
> > > noted any refcounts
> > > increasing?
> >
> > Class April 10, 2001 9:17 am April 11, 2001 8:34 am
> >
> > Products.ParsedXML.DOM.Core.Text 3241 =20
> 27318 +24077
> > Products.ParsedXML.DOM.Core.Element 1777 =20
> 14493 +12716
> > Products.ParsedXML.DOM.ExpatBuilder.ExpatBuilder 81 1506 +1425
> > Products.ParsedXML.Printer.PrintVisitor 3 107 +104
> > Products.ParsedXML.DOM.Core.Document 10 112 +102
> >
> > Yes, I've a lot of refcounts leaks.
> >
> > > any chance that this is the same problem that andy is running
> > > into (read his
> > > posts above)?
> >
> > I dunno because of my very lack of knowledge of Zope.
> > All of these refcounts leaks means that the Product is=20
> doing something
> wrong
> > or that I'm using in the wrong manner ?
> >
> > - mn
> >
> > >
> > > -d
> > >
> > > On Tue, Apr 10, 2001 at 05:27:28PM +0200, Marco Nova wrote:
> > > > Hello guys,
> > > >
> > > > It seems that I've some memory leak problems and I want to
> > > understand where
> > > > I've to look for.
> > > >
> > > > Scenario:
> > > >
> > > > I've an IIS web server that generates an XML page=20
> (taking data from
> > > > SqlServer);
> > > > The Zope web server must retrieve the XML page, manage the
> > > data and render
> > > > them in HTML (I cant only apply a XSL stylesheet to XML).
> > > >
> > > > The Facts:
> > > >
> > > > I've written a external method that - using httplib - reads
> > > the XML page and
> > > > return a string that is the raw XML sources, than I've
> > > written another
> > > > external method that use ExpatBuilder of
> > > Products.ParsedXML.DOM to parse the
> > > > XML an generate a list of [(id - {mapping})] which will be
> > > accessed with a
> > > > dtml-in tag, so in the sequence-key I've access to the=20
> ID and with
> > > > sequence-item I can access to the mapping object.
> > > > I'm using latest version of ZOPE (2.3.1, the binary one
> > > with Python 1.5.2)
> > > > and ParsedXML.
> > > >
> > > > The Problem:
> > > >
> > > > It seems that every time the method retrieve the page or
> > > parse the XML I
> > > > loose a bunch of kilobytes. Because the methods are very
> > > simple (100 lines
> > > > of code in total) and because I didn't create any class for
> > > handling this
> > > > workflow I can't understand where I can loose bytes.
> > > >
> > > > The Questions:
> > > >
> > > > Is the list generated for the dtml-in tag freed
> > > automatically by ZOPE ?
> > > > Is there a Garbage Collector somewhere that must be activated ?
> > > > Should I avoid the use of the ExpatBuilder for XML processing ?
> > > >
> > > > Thanks for listening my newbies questions.
> > > >
> > > >
> > > > Best Regards,
> > > >
> > > > - mn
> > > >
> > > > _______________________________________________
> > > > Zope-Dev maillist - Zope-Dev@zope.org
> > > > http://lists.zope.org/mailman/listinfo/zope-dev
> > > > ** No cross posts or HTML encoding! **
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> > > > http://lists.zope.org/mailman/listinfo/zope )
> > >
> > > --
> > > Dyon Balding <dyon@devcoder.com.au>
> > >
> >
> > _______________________________________________
> > Zope-Dev maillist - Zope-Dev@zope.org
> > http://lists.zope.org/mailman/listinfo/zope-dev
> > ** No cross posts or HTML encoding! **
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> > http://lists.zope.org/mailman/listinfo/zope-announce
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> >
>=20