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Former Member

High Roll (in+wait) time & GUI time

Dear Basis Experts,

I have one question about response time and hope to get your guidance.

I observed in STAD and found there was a transaction (PA61) with all kinds of time as below,

CPU time 242 ms

RFC+CPIC time 0 ms

Total time in workprocs 285 ms

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Response time 8,880 ms

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Wait for work process 2 ms

Processing time 270 ms

Load time 0 ms

Generating time 0 ms

Roll (in+wait) time 8,597 ms

Database request time 11 ms

Enqueue time 0 ms

Roll time Out 1 ms

In 4 ms

Wait 8,593 ms

Frontend No.roundtrips 6

GUI time 8,593 ms

Net time 169 ms

Roll Wait time and GUI time are the same and Net Time is not much high. What reason causes the poor performance?

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3 Answers

  • Best Answer
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    Former Member
    Nov 29, 2010 at 01:58 PM

    Hello,

    As the FE net time is not high and there is low processing time, I also doubt it's a network performance issue. However, you can test this from front-end to app server using niping (see SAP Note 500235).

    I would recommend performing an ST05 trace for the user when the problems are being experienced (SQL and RFC trace). You can then search for the GUI flush calls: OLE_FLUSH_CALL. If these are high, a front-end trace may be required. See Note 851012 'SAPGUI: Performance trace - technical details' for further info.

    Hope this helps...

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    Former Member
    Nov 17, 2010 at 02:32 PM

    Please check in ST02 to see how memory is being utilized.

    May be Roll in buffer over utilizied and the work process is waiting for some space in roll in buffer.

    Also, check work process trace and you will find why it is waiting for such long time.

    Thanks!

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  • Nov 18, 2010 at 05:17 PM

    Hello,

    What os are you on?

    What is your kernel patch level?

    regards,

    John Feely

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    • Former Member

      Dear John,

      My HR system runs on AIX with Patch Number (129) of SAP kernel 640 . I will plan to update to the latest version this weekend.

      And then try to verify if it will be improved a little.