Category Archives: Case study

share how to use one or several performance tools to trouble-shooting a real performance issue

SAP ABAP Program – reading an internal table with binary search vs without binary search

In my SAP experience, I often find that bad SAP job/program performance is due to poor program internal table handling. This is especially true when most of program/job run time is spent on CPU/ABAP side. One of common performance pitfalls is that internal table reading is not efficient. Read an internal table using binary search…

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SAP SBWP workflow item deletion performance issue

The performance issue is that our SAP users were taking minutes ( some time even more than half hour) instead of seconds to delete a workflow item via SAP transaction SBWP. What was making SAP SBWP to take that long to delete a SAP workflow item and what we did to fix this performance issue?…

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SAP program performance tuning – Suboptimal SQL execution plan part 2 of 2

This continues my previous post on Oracle SQL execution plan issue. My previous analyzed a SAP ST12 trace and found program spent most of time on a SQL statement which is using hash join method to retrieve data from two tables. And one step in the hash join is to build hash table using 1…

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SAP program performance tuning – Suboptimal SQL execution plan part 1 of 2

In this post, I would share one performance tuning experience related to long running job due to suboptimal SQL execution plan. My teammate had done a SAP ST12 trace and trace showed that the job spent a lot of time on one particular SQL. I was consulted recently on what concern I would see with…

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Why is runtime so different for the SAP daily job with similar volume?

In this post, I would go through how I did troubleshooting a SAP job performance issue and identified database server capacity as a root cause. The job performance was improved by workload adjustment and significantly improved with added database server capacity together a code change which change synchronous updating to asynchronous updating. The overall troubleshooting…

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SAP MRP Job Performance and Table Fragmentation

SAP MRP job is a critical business job. Delay completion of MRP job would delay/impact many business operations in ECC system. MRP job runtime can be impacted by many factors. In this blog, I would share one case where MRP job runtime was suddenly more than double due to SAP table fragmentation. After selected tables…

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SAP ECC-BW interface: IDOCs/TRFCs were stuck in source systemSAP ECC-BW interface: IDOCs/TRFCs were stuck in ECC system

There was a performance issue of sending data to SAP BW from ECC system. When I started to work on this, it was not sure where the issue was (BW, ECC and etc.) and why the issue had been happening. In this post, I would share how I have done troubleshooting on SAP ECC-BW data…

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SAP background job is running long due to inefficient index

In this post, I would show how I did troubleshooting on a long running job. My investigation found that runtime of the job was mostly spent on reading a SAP table VLKPA. The SQL access path chosen by database to read the table is correct based on then-existing VLKPA index. But the index used is…

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