But as a recent thread discussed, proper coding requires that you should always lock
every access to an Application variable, in which case automatic read locking on
Application scope variables does not degrade performance any more than manual read
locking of every read of an Application scope variable. So it appears your choice is
to properly lock access to shared variables and take the slight performance hit using
either automatic locking or manual locking, or do not properly lock access to shared
variables and have an unstable server.
Richard Kern wrote:
[...]Summary of lock testing on CF Server
[...]First the method of locking whether on the server or actual page does not
significantly affect the application performance.[...]
At 03:38 PM 1/2/01 -0500, Greg Wolfinger wrote:
>To my understanding using automatic read locking degrades the performance of
>a server greatly. Also, any performance degrade with using the Request
>scope won't make too much of a noticable difference. This is only my
>understanding, but I'm not positive. So as far as I am concerned the use of
>the Request scope is the way to go.
>
>--Greg
>----- Original Message -----
>From: "Bryan Love" <[EMAIL PROTECTED]>
>To: "CF-Talk" <[EMAIL PROTECTED]>
>Sent: Tuesday, January 02, 2001 2:43 PM
>Subject: Request VS Application scope
>
>
>> Here's an interesting question:
>>
>> We all know that setting global variables in the request scope is faster
>and
>> more thread-safe than using the Application scope, but does that remain
>true
>> as we scale?
>>
>>
>> Environment: 50 request variables are set in application.cfm (so they are
>> set every time a page is called) OR
>> 50 application variables are set one time.
>>
>> Scenario 1:
>> One person hits the site. One of the following happens depending on
>> how you've written the application:
>> a. 50 request variables are set and five are read
>> b. 5 application variables are read
>>
>> Scenario 2:
>> 5,000 people hit the site at once (i.e. Amazon opens sale of PS2 to
>> public). One of the following happens:
>> a. 250,000 request variables are set and 25,000 are read
>> b. 25,000 application variables are read with automatic read
>> locking set to ON in the CF admin
>>
>>
>> I would very much like to hear some feedback on this if anyone wants to
>> hypothesize about the results.
>>
>> Bryan Love ACP
>> [EMAIL PROTECTED]
>>
>>
>>
>
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