Before you configure the session agent, you must acquire the maximum available memory in the Short Term Canister. This value is displayed as the Max Ctree Bytes setting in the Services Controls tab of the Canister configuration in TMS. Write this value down for later use.

To properly throttle the session agent, you must configure the appropriate data outflow to avoid the following problems:

• Canister unable to process hits to meet the incoming rate
• Running out of memory address space in the Short Term Canister
• ctree memory limit configured too close to the maximum address space
• Spooling

Use the steps below to configure the outflow rate.

1. In the Short Term Canister Thresholds section of the Extended Decouple session agent configuration, review the value for Canister Max % Memory Used.Write this value down.
2. In the Globals section of the Extended Decouple session agent configuration, set ControlMaxOutRate to ON. When set to ON, basic throttling of hits to the canisters is enabled.
3. Configure the Outflow Control Mode setting, which manages how the session agent manages the maximum outflow rate. Set this figure to Bytes, which pegs the outflow rate to the Max Outflow Bytes Per Second setting.
4. Set Max Outflow Hits Per Second to 1000.
5. Set Max Outflow Bytes Per Second to the following formula:

   
   Max Ctree Bytes * Canister Max % Memory Used +
      (Max Outflow Hits Per Second *60)

   • For Canister Max % Memory Used, convert the value to a decimal. For example, a figure of 85% is inserted into the formula as 0.85.
   • If this value is greater than Max Ctree Bytes value, then set the value to Max Ctree Bytes - 1.