Cached scripting engines & Memory

[jimny]

I have general question regarding cached scripting engines & memory usage. We are running IIS5 with windows 2000 server. I have this one app that we launched 3-4 weeks ago, that a specific object genreates a "object required" error message about 5% of the time. When asking someone, they suggested that I am running out of scripting engines ( the app is not releasing the objects), but when I think about it, why would it do it for one specific object. I created an include file that sets every object that I create in the app to "nothing" and include on the bottom of every page. When I run the performance monitor, the Cached scripting engines keep climbing (we are at 86) and the memeory usage as well. Is this an issue? and if it is, what is the remedy? The object that generates the error message is in bold:

Set XMLDoc = Server.CreateObject("MSXML.DOMDocument&quot
XMLDoc.loadXML(ResponseXML)
Set TopNode = XMLDoc.firstChild
if (TopNode.hasChildNodes()) and not(TopNode is nothing) then
If TopNode.NodeName = "rca_response" Then
Set ResponseNode = TopNode.firstChild
If Responsenode.NodeName = "response" then

Thanks for any and all,

 

[palbano]

XMLDoc.loadXML(ResponseXML)

It might be possible that the actual text of "ResponseXML" is causing the problem.

Also in looking at your code you might consider a different approach to locating the Node you are interested in. Try using an XPath query. It might prove much more robust.

-pete

 

[jimny]

Palbano,
thanks for the reply!

the portion of the ResponseXML is:

<rca_response>
<response type=&quot;submit_ad&quot;>
<field name=&quot;source&quot;>Online Ads</field>
<field name=&quot;adtaker&quot;>Online User</field>

I am not that familiar with XML, this is created from an app that I interface with, but it seems the response text is simple enough. The &quot;<response>&quot; is as deep as I go in to the ResponseXML(I check for an &quot;<error>&quot; node as well). Do you know of any existing problems with creating the &quot;MSXML.DOMDocument&quot; or accessing its objects?

Could you point me towards a good reference for &quot;XPath query&quot; ?

thanks a mil

 

[palbano]

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/xmlsdk30/htm/xmrefxpathsyntax.asp

Using Node.firstChild is error prone due to the fact that whitespace between the nodes will generate a TextNode the &quot;firstChild&quot; of the parent node.

That is why walking a document tree is not normal procedure. Using XPath queries is vastly superior.

-pete

 

[jimny]

thanks palbano!!