How does Informatica calculate cache size?

How does Informatica calculate cache size?

Article Details

1. In the Workflow Manager open the session properties.
2. On the mapping tab, select the Lookup transformation.
3. Select Lookup Data Cache Size.
4. Click the Calculate option.
5. Enter a value for the Number of Rows with Unique Lookup Keys .
6. Select the Data Movement Mode (ASCII or Unicode).

What is the default size of index cache in aggregator transformation?

1,000,000 bytes
Aggregator Index Cache Size – Index cache size for the transformation. Default cache size is 1,000,000 bytes. If the total configured session cache size is 2 GB (2,147,483,648 bytes) or greater, you must run the session on a 64-bit Integration Service.

What is aggregate cache in aggregator transformation?

The Integration Service uses cache memory to process Aggregator transformations with unsorted input. When you run the session, the Integration Service stores data in memory until it completes the aggregate calculations.

Can we calculate in aggregator in Informatica?

Use the Aggregator transformation to perform aggregate calculations, such as averages and sums, on groups of data. task performs aggregate calculations, the task stores data in groups in an aggregate cache. To use the Aggregator transformation, you need the appropriate license.

How do I reduce the joiner cache size in Informatica?

You can configure the index and data cache sizes for a Joiner transformation session properties. partitioning, set the cache size to the total requirements for the transformation. partitioning, calculate the total requirements for the transformation, and then divide it by the number of partitions.

What is the default cache size considered by integration service of Informatica when the cache property is set to auto?

bytes
The Integration Service allocates memory from the session cache to all transformations with cache memory set to auto. The default unit is bytes.

How do I increase sorter cache size in Informatica?

To configure the cache size in the session:

1. In the Workflow Manager, open the session.
2. Click the Mapping tab.
3. Select the mapping object in the left pane.
4. Use one of the following methods to set the cache size:
5. Select a mode.
6. Provide the input based on the transformation type, and click Calculate.

How does Joiner cache work in Informatica?

The Integration Service uses cache memory to process Joiner transformations. When you run a session, the Integration Service reads rows from the master and detail sources concurrently and builds index and data caches based on the master rows.

How can we improve the performance of aggregator transformation in Informatica?

Use the following guidelines to optimize the performance of an Aggregator transformation:

1. Group by simple columns.
2. Use sorted input.
3. Use incremental aggregation.
4. Filter data before you aggregate it.
5. Limit port connections.

How do you use count in aggregator transformation?

The Informatica Aggregator Transformation operations include the following: COUNT: It will count the number of values in this column. Null values are included in the count if you select (*) as the input column. Otherwise, null values ignored.

What is persistent cache in Informatica?

What is Persistent Cache? Lookups are cached by default in Informatica. This means that Informatica by default brings in the entire data of the lookup table from database server to Informatica Server as a part of lookup cache building activity during session run.