PowerExchange for SAP NetWeaver User Guide for PowerCenter

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Caching BAPI Data

The PowerCenter Integration Service creates caches in memory for BAPI/RFC transformations. A BAPI/RFC transformation receives data from upstream transformations in the mapping and prepares the data. It stores this data in the cache.

Configure the cache size in the session properties. Default cache size is 10 MB. You can set the cache size equal to 20 percent of the available system memory. For optimal session performance, calculate the cache size based on factors, such as processing overhead and the size of the source data. For example, if the mapping or session contains other transformations that use auto caching, do not increase the cache size beyond 20 percent. If there are more than five input groups in the BAPI/RFC transformation, increase the cache size to 30 to 40 percent of the available system memory.

If you configure a large cache size, the PowerCenter Integration Service might run out of disk space and fail the session.

The following table shows the data caching properties you can configure for a BAPI/RFC transformation in a session:

Property	Description
Cache Directory	Default directory used to cache BAPI data. By default, the cache files are created in a directory specified by the variable $PMCacheDir. If you override the directory, make sure the directory exists and contains enough disk space for the cache files. The directory can be a mapped or mounted drive.
Cache Size	Total memory in bytes allocated to the PowerCenter Integration Service to cache data prepared for BAPI/RFC transformations. Default is 10 MB.

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PowerExchange for SAP NetWeaver User Guide for PowerCenter

PowerExchange for SAP NetWeaver User Guide for PowerCenter

Caching BAPI Data

Caching BAPI Data