Define service policy goal properties

Customize service policies using the guidelines on this page. By defining goal properties, you can determine when and for how long a service policy runs. A service policy is a user-defined business goal, and correlates to transaction and work class components. A service policy categorizes and prioritizes work requests. The service policy creates the goal, while the work classes connect specified information such as Uniform Resource Identifiers (URIs) to that goal. Internet Inter-ORB Protocol (IIOP) type work classes use Enterprise JavaBeans (EJB) and EJB method names to map to the goal. Java Message Service (JMS) type work classes use bus and destination names to map to the goal.

To view this administrative console page, click Operational policies > Service policies > New.

To create, modify, or remove service policies and transaction classes, you must have administrator or configurator administrative privileges.

Average response time goal type properties

Average response time goals are indicative of work with a higher priority than discretionary. The average response time goal is assigned a specific time goal on the following panels.

Goal Value
Make this value equal to the maximum time that is allotted for work completion for your service policy. For example, PLATINUM work does not exceed 1250 milliseconds. A valid goal range must be greater than 0 and less than or equal to 5 minutes. The five-minute maximum can be displayed as 300 seconds or 300,000 milliseconds.
Importance
When the system is under stress, the importance value determines the application work that can best tolerate performance decrements. The higher the importance, the less tolerant that the work associated with that service policy is to performance reductions. For the PLATINUM example, select Highest as the importance. Do not set all policies to the highest level of importance, unless all policies can degrade to the same proportion when the system is overloaded.
Monitor for persistent service policy violations
Optional. Requires different settings depending on the type of response time.
Goal Delta Value
Specifies the allowable amount of time difference between the configured goal value and the actual average response time of requests that are served.
Time Period Value
Create a runtime task when the configured allowable difference is not met.

Percentile response time goal type properties

Percentile response time goals are another measure for work with a higher priority than discretionary. The percentile response goals are defined with specific criteria on the following panel. The percentile response time target is the percentage of requests whose response time is T or less that should be P or more; a target has particular values for T and P.

Goal Percentile
Specifies a percentage of requests to handle in a specific time frame.
Goal Value
Make this value equal to the maximum time that is allotted for work completion for your service policy. For example, PLATINUM work does not exceed 1250 milliseconds. A valid goal range must be greater than 0 and less than or equal to 5 minutes. The five-minute maximum can be displayed as 300 seconds or 300,000 milliseconds.
Importance
When the system is under stress, the importance value determines the application work that can best tolerate performance decrements. The higher the importance, the less tolerant the work associated with that service policy is to performance reductions. For the PLATINUM example, select Highest as the importance. Do not set all policies to the highest level of importance, unless all policies can degrade to the same proportion when the system is overloaded.
Monitor for persistent service policy violations
Optional. Requires different settings depending on the type of response time.
Goal Delta Percentage
Specifies the allowable percentage difference between the configured goal percentile and the actual percentage of requests that are served.
Time Period Value
Create a runtime task when the configured allowable difference is not met.

Discretionary goal type properties

Discretionary goals indicate work that does not have significant value. As a result, work of this type can see a degradation in performance when resources are constrained.



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