Interactive Performance Assistant: This tool in IBM Cognos Analytics V11.1.x provides real-time performance monitoring and analysis for reports.
Enabling the Assistant: By enabling the interactive performance assistant, users can gather detailed performance metrics as the report runs, which helps identify bottlenecks and areas for optimization.
Benefits: This tool provides insights into query execution times, rendering times, and resource usage, enabling developers to make informed decisions to improve report performance.
Reference: The IBM Cognos Analytics V11.1.x documentation outlines how to enable and use the interactive performance assistant for investigating and improving report performance.
Question 17
Which technique is most likely to improve query performance?
Options:
A.
Set the auto-sort property to maximum.
B.
Set the detail aggregation to 'Calculated' for measures.
Query Performance: Enhancing query performance involves various optimization techniques.
Avoid Functions in Filters: Using functions in filters can lead to slower query performance because functions often require additional computation and can prevent the database from using indexes efficiently.
Best Practices: It is recommended to simplify filters and avoid complex functions to ensure queries run faster.
Reference: IBM Cognos Analytics V11.1.x documentation suggests avoiding the use of functions in filters as a best practice for improving query performance.
Question 18
When should a dimensional function be used in a report's Query calculation?
Options:
A.
when the data source is a dimensional or dimensionally-modeled data source
B.
to allow relative date functions to be performed against a non-dimensional data source
C.
to convert a non-dimensional data source into a dimensionally-modeled data source
D.
to allow drill up and down on a non-dimensional data source
In IBM Cognos Analytics V11.1.x, dimensional functions should be used in a report's Query calculation when working with a dimensional or dimensionally-modeled data source. Here’s why:
Dimensional Data Sources:
Structure: Dimensional data sources are organized into dimensions, hierarchies, and measures. These structures support advanced analytical capabilities such as drill-down and roll-up.
Dimensional Functions: Functions such asmember,ancestor,children, etc., are specifically designed to navigate and manipulate the hierarchical data structures in dimensional sources.
Query Calculations:
Contextual Calculations: Dimensional functions allow for context-aware calculations, leveraging the inherent structure of the data source. This ensures that calculations respect the dimensional context and hierarchy.
Analytical Depth: Using dimensional functions enables deeper analytical capabilities, such as performing relative date calculations, time series analysis, and hierarchical aggregations.
Dimensional functions are essential for harnessing the full analytical power of dimensionally-modeled data sources.
[: IBM Cognos Analytics Framework Manager and Report Studio User Guides, , ]
