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SAP performance tuning · Lesson

Performance tuning

Quick answer

Always measure first: baseline with ST03, drill to the worst offenders, trace the cause, fix one thing (usually bad SQL/code or an index), and re-measure.

Key takeaways

  • Database: expensive SQL, missing indexes, outdated statistics (usually the first bottleneck).
  • Custom ABAP: SELECT-in-loop, SELECT *, nested loops on big tables.
  • Buffers/memory: under-sized program/table buffers.
  • Watch out: Tuning without measuring.

Where performance is won or lost

  • Database: expensive SQL, missing indexes, outdated statistics (usually the first bottleneck).
  • Custom ABAP: SELECT-in-loop, SELECT *, nested loops on big tables.
  • Buffers/memory: under-sized program/table buffers.
  • Work processes: wrong mix/number for the workload.

The tuning toolkit

  • ST03 workload analysis.
  • ST05 SQL trace; SAT/ST12 runtime analysis.
  • ST04 / HANA plan analysis.
  • SM50/SM66 work-process monitoring.

The method

Always measure first: baseline with ST03, drill to the worst offenders, trace the cause, fix one thing (usually bad SQL/code or an index), and re-measure. On HANA, push logic to the database and avoid row-by-row processing.

Common pitfalls

  • Tuning without measuring.
  • Ignoring custom-code SQL.
  • Under-sized DB/buffers.

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Check your understanding

  1. Which statement is true of Performance tuning?

    • A. Goods Receipt (GR) records the physical receipt of ordered goods into inventory, a pivotal step that updates…
    • B. System monitoring keeps an SAP system healthy by watching its work processes, memory, database, jobs, updates…
    • C. On HANA, push logic to the database and avoid row-by-row processing.
    Show answer

    C. On HANA, push logic to the database and avoid row-by-row processing.

    Covered in the “The method” section of this lesson.

  2. Which of these also applies to Performance tuning?

    • A. Over-granting backend authorizations.
    • B. Work processes: wrong mix/number for the workload.
    • C. Configuring in the wrong client.
    Show answer

    B. Work processes: wrong mix/number for the workload.

    Covered in the “Where performance is won or lost” section of this lesson.

  3. Which part of the Learn SAP curriculum covers Performance tuning?

    • A. Getting started
    • B. SAP MCQs
    • C. SAP performance tuning
    Show answer

    C. SAP performance tuning

    This lesson sits in the SAP performance tuning section of the Learn SAP course.

Frequently asked questions

What does the term Performance tuning refer to in SAP?

Performance tuning keeps SAP fast and scalable by finding and fixing bottlenecks across the database, application server and custom code. It is a measurement-driven discipline, never guesswork.

What else is worth knowing about Performance tuning?

Always measure first: baseline with ST03, drill to the worst offenders, trace the cause, fix one thing (usually bad SQL/code or an index), and re-measure.

What is the practical takeaway on Performance tuning?

Database: expensive SQL, missing indexes, outdated statistics (usually the first bottleneck). Custom ABAP: SELECT-in-loop, SELECT *, nested loops on big tables. Buffers/memory: under-sized program/table buffers.

What tends to go wrong with Performance tuning?

Tuning without measuring. Ignoring custom-code SQL. Under-sized DB/buffers.
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