56 Communication Control ToolkitEngineering Communication Control Toolkit Standard 5.01Guidelines to minimize capacity requirementsThe engineering models used to calculate the capacity requirements of yourcontact center assume that you follow certain guidelines to minimize the load onyour server.Steady state operationSteady state refers to an operational state in which average values of the capacityparameters do not change with time. For example, CPU utilization may varywidely at different consecutive time instances; however, if we examine theaverage values of CPU utilization taken over consecutive 20-minute intervals,during a period of steady state operation, these average values are approximatelythe same.Guidelines for steady state operationTo ensure trouble-free operation of the server, adhere to the following guidelinesfor steady state operation: Processor CPU: Average CPU utilization over any 20-minute periodduring the peak hour under steady state operation must not exceed 70percent. Server RAM memory: Average pages per second (found in the MemoryObject of the Performance Monitor) over any 20-minute period during thepeak hour under steady state operation must not exceed 5. Server virtual memory: Committed Bytes (found in the Memory Object ofthe Performance Monitor) must not exceed 90 percent of the Commit Limit(also found in the Memory Object of the Performance Monitor). Physical and virtual memory: For optimal performance, you must adhereto the Microsoft recommendations for physical RAM and virtual memorysizing. For more information, see “Memory requirements” on page 47. Nortel server subnet traffic: Average Nortel server subnet utilization mustnot exceed the limit specified on page 103 (for a contact center or self-service environment), or on page 93 (for a knowledge worker environment).