v2.0.50727 machine.config processModel 节点信息没有？是为什么呢？

v2.0.50727 machine.config  processModel 节点信息没有？是为什么呢？
一般processModel 节点信息如下
<!--
            <processModel
                enable = "true" [true|false]
                timeout = "10675199.02:48:05.4775807" [HH:MM:SS]
                idleTimeout = "10675199.02:48:05.4775807" [HH:MM:SS]
                shutdownTimeout = "00:00:05" [HH:MM:SS]
                requestLimit = "2147483647" [number]
                requestQueueLimit = "5000" [number]
                restartQueueLimit = "10" [number]
                memoryLimit = "60" [number]
                webGarden = "false" [true|false]
                cpuMask = "0xffffffff" [number]
                userName = "machine" [String]
                password = "AutoGenerate" [String]
                logLevel = "Errors" [None | All | Errors]
                clientConnectedCheck = "00:00:05" [HH:MM:SS]
                comAuthenticationLevel = "Connect" [None | Call | Connect | Default | Pkt | PktIntegrity | PktPrivacy]
                comImpersonationLevel = "Impersonate" [Default | Anonymous | Delegate | Identify | Impersonate]
                responseDeadlockInterval = "00:03:00" [HH:MM:SS]
                responseRestartDeadlockInterval = "00:03:00" [HH:MM:SS]
                autoConfig = "false" [true|false]
                maxWorkerThreads = "20" [number]
                maxIoThreads = "20" [number]
                minWorkerThreads = "1" [number]
                minIoThreads = "1" [number]
                serverErrorMessageFile = "" [String]
                pingFrequency = "10675199.02:48:05.4775807" [HH:MM:SS]
                pingTimeout = "10675199.02:48:05.4775807" [HH:MM:SS]
                maxAppDomains = "2000" [number]
            />
        -->但是在v2.0上的machine.config  却没有这样的节点？哪么请问，没有这样的节点，系统会使用什么样的默认设置呢？