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Maximum file size for passthrough scenarios in PI 7.5

Hi Experts,

We are working on File to JMS [SAP ECC to MQ] passthrough scenario where the files need to be picked up from shared folder & then transfer them to MQ queue.

Please let me know max file size allowed by PI system in this scenario.

Thanks,

Ramu.

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1 Answer

  • May 08 at 07:55 AM

    Hello Ramu,

    We treat the message larger than 100MB as a large message in PI, but the exact max file size is different in the different system environment e.g. memory, CPU and etc. Also, that is why we will do the sizing before we install the system. The larger message, need larger memory size. For example,

    The initial heap size of a newly started AS Java server node is about 700 MB. If the PI system uses SLD and XSLT mappings locally, then you should assume that up to 300 MB can be used for caches. If it is a dual stack installation, then mapping calls from the Integration Engine also need processing space. Large Message Handling does not capture the processing of sender channels. If you have a heap size of 3 GB for each AS Java server node, then you can assume that you can have up to 1.5 GB processing space for large messages. Another consideration is how much processing space is required for a message of size X MB. Based on current experience this could reach a factor of 15 for very memory-intensive mappings or complex XPath expressions in content-based routing. This could lead to about 100 MB total message size for large messages that are processed concurrently.

    For more details, please check the following note:

    1727870 - Handling of large messages in the Messaging System

    Best Regards,

    Liz

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