[Zope-dev] memory leak

[Marco Nova]

> 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  27318  +24077  
Products.ParsedXML.DOM.Core.Element               1777  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 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 (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 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
> > 
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> 
> -- 
> Dyon Balding <dyon@devcoder.com.au>
>