Considerations for Engine Resource Distribution

Making execution class assignments indiscriminately does not usually yield what you expect. Certain conditions yield better performance for each execution object type. Table 4-5 indicates when assigning an execution precedence might be advantageous for each type of execution object.

Table 4-5: When assigning execution precedence is useful

Execution object


Client application

There is little contention for non-CPU resources among client applications.

Adaptive Server login

One login should have priority over other logins for CPU resources.

Stored procedure

There are well-defined stored procedure “hot spots.”

It is more effective to lower the execution class of less-critical execution objects than to raise the execution class of a highly critical execution object. The sections that follow give more specific consideration to improving performance for the different types of execution objects.