Automation system performance myths

Supervisory System Performance Myths Paul Guerin CR&C Automation Group

Performance Myths ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Performance Myths ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Performance Myths ,[object Object]

Performance Myths ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Performance Myths ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Performance Myths ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Performance Myths ,[object Object],[object Object],[object Object],[object Object],[object Object]

Performance Myths ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Performance Myths ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Regardless of capacity utilisation the engineer performs the highest priority job at the time.

Performance Myths ,[object Object],[object Object],higher CPU utilisation = slower response time of a process

Performance Myths ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],higher CPU utilisation = slower response time of a process

Performance Myths ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],response time = I/O service time + I/O queueing delay + CPU service time + CPU queueing delay

Performance Myths ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],response time = I/O service time + I/O queueing delay + CPU service time + CPU queueing delay

Performance Myths ,[object Object],When you add capacity, only add it to the bottleneck device of the user you are targeting.

Performance Myths ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Performance Myths ,[object Object],[object Object]

Performance Myths ,[object Object],[object Object],[object Object],[object Object],Regardless of capacity utilisation the CPU performs the highest priority job at the time.

Performance Myths ,[object Object],[object Object],[object Object]

Performance Myths ,[object Object],[object Object],[object Object],[object Object],[object Object],response time = I/O service time + I/O queueing delay + CPU service time + CPU queueing delay

Performance Myths ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],response time = I/O service time + I/O queueing delay + CPU service time + CPU queueing delay

Performance Myths ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],response time = I/O service time + I/O queueing delay + CPU service time + CPU queueing delay

Performance Myths ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Performance Myths ,[object Object],[object Object],[object Object],[object Object],Base priority (typically interactive processing) Semi-time critical user actions Non-time critical user actions telnet priority Time critical user actions (typically batch processing)

Automation system performance myths

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