The following are steps to SET it, but it occurs to be it might actually be shown in the textbox at the end...
1.
In IIS Manager, expand the local computer, right-click the application pool you want to configure, and then click Properties.
2.
On the Performance tab, select the Limit the kernel request queue (number of requests) check box.
3.
In the text box to the right of Limit the kernel request queue (number of requests), type the maximum number of requests to allow in the request queue, and then click OK.