Specifies the number of sparse dimensions included in the identification of tasks for parallel calculation.
Syntax
SET CALCTASKDIMS n;| Parameter | Description | ||
|---|---|---|---|
n | A required parameter, an integer specifying the number of sparse dimensions to be included when Essbase identifies tasks that can be performed at the same time. The default value, 1, indicates that only the last sparse dimension in the outline will be used to identify tasks. A value of 2, for example, indicates that the last and second-to-last sparse dimensions in the outline are used. Because each unique combination of members from the selected sparse dimensions is a potential task, the potential number of parallel tasks is the product of the number of members of the selected dimensions. The maximum value is the number of sparse dimensions in the outline. Essbase issues an error if the value is less than 1. A value greater than the number of sparse dimensions in the outline is interpreted as the largest valid value. Using the calculator bitmap cache can affect this value. See the Oracle Essbase Database Administrator's Guide discussion of parallel calculation for more information.
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Notes
A number of features are affected by parallel calculation. See the Oracle Essbase Database Administrator's Guide for a list of these effects and for detailed information about how Essbase performs parallel calculation.
Use this configuration setting only if your outline generates many empty tasks, thus reducing opportunities for parallel calculation.
If you do not notice an improvement in performance after raising the value of CALCTASKDIMS, consider returning it to its default value of 1. Sometimes using more task dimensions can generate such a large number of tasks that performance may decrease instead of increase, because the overhead of generating and managing the tasks is too great.
You can use SET CALCTASKDIMS to override a CALCTASKDIMS entry in the configuration file. For example you might want to set all applications to use a single dimension for parallel calculation, but issue a calculation script command against a single application or database to use two dimensions.
Example
SET CALCTASKDIMS 2;
specifies that the last two sparse dimensions in the outline will be used to identify potential tasks to be performed at the same time during a calculation pass.
See Also