I wouldn't recommend avoiding the read-only locks, however in my experience they are much less likely to cause memory errors.
At 12:36 AM 6/27/2002 +1000, you wrote: >Shared variables such as application and session should be locked, >however the lock really only needs to be there on a write. Writing to a >shared variable can cause the system to hang or enter a state of >confusion, hence the locking of the variable. > >However although recommended to lock all reads and writes, I personally >have never done it on a read of said such variables. It is also very >safe to do the following... > ><cflock> > <cfset application.test = "Test"> > <cfoutput>Hello</cfoutput> ></cflock> > >All it means is that while this bit of code is being run, nobody else >can access this bit of code until this process has released the lock. If >2 applications write to a variable at the exact same time (rare, but >very possible) CF can enter a state of deadlock and will require the >server to be restarted. > >For more information on this, consult the manual about the attributes >scope and type that allow the variable to be read only or exclusive and >to define the type of variable it is. For example is it an application, >server or even session scope. > >But the point is well within what has been discussed many times on this >list, should we or should we lock reading of variables. Like I said I >don't when reading them, and have never had any problems (touch wood) >with this method. > >But there are many reasons why one should use application scope >variables, for example to determine how many people are actually logged >into a membership system as a good example. > > > >-----Original Message----- >From: Shawn Regan [mailto:[EMAIL PROTECTED]] >Sent: Thursday, 27 June 2002 12:18 AM >To: CF-Talk >Subject: RE: What is the best variable scope? > >Why do you need to lock it? > >Shawn Regan > > > ______________________________________________________________________ Get the mailserver that powers this list at http://www.coolfusion.com 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
