© 2011 IBM Corporation Business Analytics software Performant Prompting Neil Warner – Client Technical Professional 29 April 2011

© 2011 IBM Corporation2

Business Analytics software

Topics

Prompt page design



Topics

Prompt page design

Large dataset considerations



Topics

Prompt page design


Concurrent query execution (query hint)



Topics

Prompt page design



Prompt reconciliation (query hint)



Topics

Prompt page design




Query caching



Topics

Prompt page design




Query caching

Prompt data caching



Topics

Prompt page design




Query caching

Prompt data caching

Run options



Prompt Page Design

Authored vs. generated prompt pages

Single vs. multiple prompt pages

Conditional blocks

Conditional rendering vs. no rendering

Dedicated prompt queries

Using model settings to control generated queries



Large Datasets Considerations

Select & search prompt

Cascading prompt controls

Tree prompts

Limiting use of reprompt



Concurrent Query Execution

Available starting in 8.2

Controlled by query hint AND advanced server properties

Issues simultaneous queries to database

Helps when majority of report execution time occurs during query execution

Individually set for batch report service and report service



Concurrent Query Execution:Advanced Server Properties

RSVP.CONCURRENTQUERY.NUMHELPERSPERPROCESS– Default is 0– Setting greater than 0 enables concurrent query execution– Specifies maximum number of query execution helpers per report/batch report service– Each helper executes one query at a time

RSVP.CONCURRENTQUERY.MAXNUMHELPERSPERREPORT– Default is 1– Setting greater than 1 is required to benefit from concurrent query execution– Specifies maximum number of query execution helpers per report– Prevents a report from consuming all available helpers

RSVP.CONCURRENTQUERY.ENABLEDFORINTERACTIVEOUTPUT– Default is ‘False’– Setting of ‘True’ enables concurrent query execution when producing interactive output– For interactive reports, some queries may be executed but the results are not used



Prompt Reconciliation

Ensures prompt control properties are consistent with associated parameter properties – Cardinality

• [Query Item] = ?parameter? Single value• [Query Item] in ?parameter? Multiple values• [Level]->?parameter? Single value• Set ([Level]->?parameter?) Multiple values• #prompt (“parameter”, …)# Single value• #promptmany (“parameter”, …)# Multiple values• Other parameter usage in data items Single value

– Discreteness• [Query Item] = ?parameter? Discrete value• [Query Item] in_range ?parameter? Range values• #prompt[many] (“parameter”, …)# Discrete value(s) • Other parameter usage in data items Discrete value

– Optionality• #prompt[many] (“parameter”, …)# Mandatory• #prompt[many] (“parameter”, …, “value”)# Optional• Other parameter usage in data items Mandatory

– Data type



Prompt Reconciliation:Query Hint: Use For Parameter Info

Available starting in 8.2

Prioritizes queries used to obtain parameter information

Controls data typing and capabilities

Complements automatic query prioritization



Use For Parameter Info:Advanced Server Properties

Complements ‘Use For Parameter Info’ Query Hint

Prioiritizes and groups queries– Queries with query hint Use For Parameter Info set to true– Filtered queries not associated with prompt controls (Group 1)– Filtered queries associated with prompt controls (Group 2)– Unfiltered queries not associated with prompt controls (Group 3)– Unfiltered queries associated with prompt controls (Group 4)

RSVP.PROMPT.RECONCILIATION– Complete (Default)– Grouped, Chunked Grouped, Chunked

RSVP.PROMPT.RECONCILIATION.CHUNKSIZE– Sets chunk size for Chunked and Chunked Grouped– Default is 5



Use For Parameter Info:Advanced Server Properties

1 2 3 4

Complete

Grouped

Chunked

Chunked Grouped

Query GroupsQuery Groups

RSVP.PROMPT.RECONCILIATION

.CHUNKSIZE *

RSVP.PROMPT.RECONCILIATIO

N

*



Query Caching

Prevents re-preparation of queries when reprompting– Select & Search control– Same page cascading prompts– Explicit reprompt

Controlled by “queryReuse” in CQEConfig.xml

Default of 5 cached queries

Does not span report executions



Prompt Data Caching

Available starting in 8.2 MR1

Prompt values stored in Content Manager

Prompts populated based on stored values

Useful for non-volatile, non-user specific prompt data

Cache created with jobs– Cache does not expire– Refreshed based on job schedule

Cache created with report properties– Cache expires based on report property setting– Refreshed on first report execution or first execution following cache expiry



Prompt Data Caching:Cacheable Queries

Query must be referenced by a prompt page

Query must be able to execute without parameter values(no parameterized filters or parameters used in item definitions in the model)

Queries associated with cascaded prompt controls are not cacheable(parameterized filter is implicitly applied when a parent value is selected)

Queries on tree prompt controls use the prePopulateLevels property to determine how much data is cached



Run Options: Prompt For Values

Always see authored prompt pages, if any

No attempt is made to execute a report page until Finish is pressed on an authored prompt page

Better for reports with authored prompt pages

Prompt Run Option Checked

An attempt is made to execute report page first

If unsatisfied parameters, you may see prompt pages

For optimal performance, all parameters, including optional parameters, should have values

Prompt Run Option Unchecked



Run Options: Advanced Server Properties

RSVP.PROMPT.ALLREMAININGOPTIONAL– Applies when there are authored prompt pages– Controls if a generated prompt page appears if only optional parameters remaining after

finishing the authored prompt page sequence

Documents

© 2011 IBM Corporation Business Analytics software Performant Prompting Neil Warner – Client Technical Professional 29 April 2011