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Limit State Storage

 As the amount of memory required by an application becomes large, its performance decreases. You can solve this problem by limiting the amount of state stored in memory or by storing state using some other means, as described in the chapter "Managing State". You can also set up the application so that it shuts down if certain conditions occur, as described in the section "Automatically Terminating an Application".

One common mistake is neglecting to set a session time-out value. By default, sessions almost never expire, so the application may be using valuable memory to store sessions that users have long forgotten. When you set the session time-out value, if the session is idle for that amount of time, it terminates and its state is removed from memory. This is described in more detail in "Managing State."

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