What is push down Optimisation in Informatica?
What is push down Optimisation in Informatica?
Pushdown optimization is a concept using which you can push the transformation logic on the source or target database side. When you use the SQL override, the session performance is enhanced, as processing the data at a database level is faster compared to processing the data in Informatica.
How does aggregator transformation improve session performance?
Use the following guidelines to optimize the performance of an Aggregator transformation:
- Group by simple columns.
- Use sorted input.
- Use incremental aggregation.
- Filter data before you aggregate it.
- Limit port connections.
How do I enable pushdown optimization in Informatica?
Configure a Session for Pushdown Optimization
- Open the session properties for the session that you created.
- On the. Properties. tab, select the value of the.
- Click the. Mapping. tab in the session properties.
- Click. Sources. and enter the database name in the.
- Click. View Pushdown Optimization.
What are sessions in Informatica?
A session is a set of instructions that tells the Integration Service how to move data from sources to targets. A session is a task, similar to other tasks available in the Workflow Manager. You create a session for each mapping that you want the Integration Service to run.
What are the session properties in Informatica?
Session property is a set of instructions that instructs Informatica how and when to move the data from source to targets. A session property is a task, just like other tasks that we create in workflow manager. Any session you create must have a mapping associated with it.
What is session partitioning in Informatica?
Informatica Partitioning The Informatica PowerCenter Partitioning Option increases the performance of PowerCenter through parallel data processing. The partitioning option will let you split the large data set into smaller subsets which can be processed in parallel to get a better session performance.
How does the source level commit affect the session performance?
The number of rows held in the writer buffers does not affect the commit point for a source-based commit session. It might not roll back to the same source row for targets in separate transaction control units. Source-based commit may slow session performance if the session uses a one-to-one mapping.
What is the use of sorted input in aggregator transformation?
The Sorted Input option reduces the amount of data cached during the session and improves performance. Use this option with the Source Qualifier Number of Sorted Ports option or a Sorter transformation to pass sorted data to the Aggregator transformation.
How can we improve the performance of joiner transformation in Informatica?
Use the following tips to improve session performance with the Joiner transformation:
- Designate the master source as the source with fewer duplicate key values.
- Designate the master source as the source with fewer rows.
- Perform joins in a database when possible.
- Join sorted data when possible.
What types of pushdown optimization are supported in Iics?
There are three different types in which Pushdown Optimization can be configured.
- Source-side Pushdown Optimization.
- Target-side Pushdown Optimization.
- Full Pushdown Optimization.
What are session properties?
Session property is a set of instructions that instructs Informatica how and when to move the data from source to targets. A session property is a task, just like other tasks that we create in workflow manager. A session can have a single mapping at a time and once assigned, it cannot be changed.
