Joe Are you saying if i' copy a session var to the request scope simply using <cfset request.var = session.var > , because their both complex datatypes i'm still only creating a pointer and actually need to use the duplicate function?
Thanks Kola > >-----Original Message----- > >From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] > >Sent: 13 July 2002 23:56 > >To: CF-Talk > >Subject: RE: RE: RE: Storing Queries in Application Scope > > > > > >Hi Joe, > > > >The reason for using the duplicate() function to copy data > >between the request and application scopes is that creating a > >pointer to an application scope query in the request scope, i.e. > > > ><cflock scope="application" ...> > ><cset request.myquery = application.myquery> > ></cflock> > > > >defeats the purpose of locking the application scope, since > >using the pointer created in this example is still using the > >application scope directly and thus creates the potential for > >server instability as a result of application scope race conditions. > > > >You can test this in CF 5 : in the CF Administrator turn on > >"require locking" for the application scope, then use the above > >example and reference the query outside the lock -- CF Server > >responds with an error message indicating that the query > >contains variables in the application scope and therefore cannot > >be referenced without an active lock. > > > >In some cases it's better to simply reference individual > >variables in a cflock since you can't manipulate the pointer to > >a simple value directly in ColdFusion. If you need the entire > >contents of a query however, it's often more efficient to go > >ahead and use the extra memory in the request scope and let the > >CF Server's "garbage collection" handle freeing that memory up > >after it finishes parsing the page. > > > >Admittedly, I tend to err on the side of using more memory > >rather than going to the db more often, etc... The reason I do > >this is because memory is generally less expensive and easier to > >install than more processor speed, etc. Especially lately -- > >anyone else notice the fire-sales on RAM this year? :) > > > >Isaac > > > >www.turnkey.to > >954-776-0046 > > > >Original Message ----------------------- > >Hi Issac, > > Your are right as well.."Right tool for the right Job". I > >wonder if it > >would be a > > better solution to "NOT Duplicate the Structure" like > > <cflock type="readonly" timeout="20"> > > <cfset Request.MyReqQuery=Application.MyQuery> Note: No > >Duplicate or > >StructCopy > > </cflock> > > There by only making referrence to Application scope like a > >POINTER since > > the data doesnt need to manipulated and only stored/displayed. > > Wouldnt this save memory space.. since u are not really > >creating a DEEP > >Copy > > into the 2nd structure(Request)? > >Joe > >Certified Advanced ColdFusion Developer > >[EMAIL PROTECTED] > > > > ______________________________________________________________________ Signup for the Fusion Authority news alert and keep up with the latest news in ColdFusion and related topics. http://www.fusionauthority.com/signup.cfm FAQ: http://www.thenetprofits.co.uk/coldfusion/faq Archives: http://www.mail-archive.com/[email protected]/ Unsubscribe: http://www.houseoffusion.com/index.cfm?sidebar=lists
