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Sql trace

Posted on Feb 11, 2005 at 09:35 PM 22 Views

Hi All,

I am new to this ABAP field..

I know how to do SQL trace ....But what I am not getting is " <b>HOW CAN WE TELL FROM THE OUTPUT OF SQL TRACE, THAT THIS IS THE CAUSE OF SLOW PERFORMANCE OF A REPORT</b>" Based on what are we determining the performance?

Can Anybody help me here pls?............

Kelly

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    author's profile photo Christian Wohlfahrt
    Christian Wohlfahrt
    Posted on Feb 12, 2005 at 09:08 AM
    2

    Hi Kelly,

    if you really have no idea, why a report is slow, then you have to start with SE30 (runtime analysis).

    There are three bargraphs: ABAP / database / system.

    System should be more or less nothing.

    If ABAP is bigger than database: have a look at slow abap-statements (normally operations with internal tables: read, delete, loop where,...); classic reason: to much reads without binary search / sorted table / hashed table use.

    If database is bigger than ABAP: have a look at your SQL statements. If you can see already forgotten key fields, fine - otherwise SQL trace will bring help in analyzing.

    A SQL trace itself says nothing about overall performance (which is done by runtime analysis), only about database part. But 'normally' programmers have their ABAP-part in control and struggle only with slow selects: that's the reason, why often SQL trace is used immediately.

    I hope, this brings a little bit light in your question,

    regards,

    Christian

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  • author's profile photo Serdar Simsekler
    Serdar Simsekler
    Posted on Feb 11, 2005 at 09:48 PM
    1

    Hi Kelly

    Try <b>"Runtime Analysis Tool"</b> instead. The transaction code is <b>"SE30"</b>. There you can analyse database calls, etc... and see what takes how much time during runtime.

    *--Serdar

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  • author's profile photo Durairaj Athavan Raja
    Durairaj Athavan Raja
    Posted on Feb 12, 2005 at 03:06 AM
    0

    From the SQL trace you can find,

    1. are there recurrsive database calls

    2. What index a particular selecte statement is using

    3. What is the cost per database read

    4. Which database read is taking more time, etc

    Regards

    Raja

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