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# Service Manager Performance Considerations

Like any application, Service Manager requires a certain amount of system resources. Consider the following guidelines to maximize the performance of Service Manager when delivering subscriber services:

- Minimize service definitions—Use the minimum number of JUNOSe commands in a service definition to specify a service.
- Reference objects in service definitions—Referencing commonly used objects is more resource-efficient than using unique objects for each subscriber (for example, using a subscriber’s IP address as a match criteria in a classifier list).
- Preprovision frequently used services— Preprovisioning saves resources by requiring Service Manager to build a popular service only once. You then reuse the original service when you activate future subscriber service sessions. See Preprovisioning Services for details.
- Capture volume statistics when needed—Repeatedly capturing volume statistics can waste resources.

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