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Performance issues with using set parameter id


Is there a significant performance impact when using parameter id's in SAP memory? There is a thought of setting a parameter id per user when the user logs into SAP. The memory is assumed to be freed when the user logs out? Is this a correct assumption? What is the impact on system performance with having a large amount of parameter ID's in SAP memory?

Please advise.



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    Posted on Oct 19, 2005 at 06:25 PM

    I wouldn't think the performance hit would be visible, how many are we talking about?


    Rich Heilman

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    • <i>But, we would need log out only those users of a specific legacy system.</i>

      Here is the logic I am thinking about.

      1) User logout of a specific legacy system. I am assuming you are trapping this event.

      2) you then immediately check in SAP if the user is logged in. I am assuming you know the mapping of legacy user id to SAP user id. You will check this using the code I pasted.

      3)If the user is logged in, log him out(I don't know how).


  • Posted on Oct 19, 2005 at 06:43 PM

    Even when you are not adding any paramter IDs, there is a lot that SAP is keeping in the memory and it can handle lot more. There shouldn't be any noticeable performance downgrade. Yes, you are correct in saying that once the user logs out, the user buffer is cleared/freed.

    If you are talking about thousands of parameter ids, then there may be some issue. Also remember, your parameter value cannot exceed the length of 250.

    What is the need for so many parameter ids?


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