How can I improve my HANA performance?
SAP HANA Table-level Optimization
- Use the appropriate table type based on the usage.
- Avoid using indexes on non-unique columns.
- Get better performance by assigning range, hash, and round-robin partitions to the large tables since the amount of data brought into working memory can be limited.
What is the inclusive and exclusive time in SAP HANA?
The Exclusive Time in the node refers the time taken to execute a single operation. The Exclusive Time in the Join(JECreateNTuple) node is 0.1 ms . The Inclusive Time is the time taken to execute the complete operation including the time of the children operators and excluding compile time.
How do I check my HANA view performance?
Procedure
- Open the calculation view in the view editor.
- In the menu bar, choose (Switch to Performance Analysis Mode) dropdown list.
- Choose Run Performance Validations for this View. SAP HANA modeler executes the validation rules and provides the validation results in the job log.
What is optimize join in SAP HANA?
If the filters are defined on join columns for which you have enabled Optimize Join Columns, the join optimizer cannot remove attributes of static filters. In this case, you can optimize the join column by introducing a dummy projection view node between the join and the input node with static filters.
How do you performance tune in SAP basis?
Guidelines for SAP Performance Tuning
- Analyze carefully: Before you change anything, analyze your system carefully.
- Make no changes without analysis: You should never change parameters or take other tuning measures without first performing an analysis.
- Verify: Once you have made the changes, perform another analysis.
How do you analyze CDS views?
PlanViz Analysis on CDS views
- First, goto ST05 and activate the trace.
- Now from Hana Studio, execute the CDS view on which you want to check the performance.
- After sucessfully executed the CDS view in Hana Studio, deactivate the Trace that was enabled before.
- Click on the Display Trace.
Which of the following will you use to determine the engines that are used when an information model is queries?
Note: To check what engine is used to process a query: simply run the Plan Visualization on your query. Plan Viz is used to Analyze how the query execution is taking place in HANA (engines used, operators, Number of column queried from tables..) Select the query and right click and select explain plan viz.
How do I read an explanation plan in SAP HANA?
Using SAP HANA Studio Features Using the SAP HANA Studio SQL console, you can start the Explain Plan by choosing Explain Plan in the context menu, or by blocking the whole statement and running CTRL + SHIFT + X . Either way, the result shows that a plan has been created, selected, and then deleted.
What is inclusive and exclusive in SAP?
1. Free goods must be of the same material for Inclusive bonus quantity method : It is not mandatory , we can use same material or different material . 2. For Exclusive method it can be either same or different material. Or must it be different material only?: we can use same material or different material .
How do you optimize a join?
To perform a nested loops join, Oracle follows these steps: The optimizer chooses one of the tables as the outer table, or the driving table. The other table is called the inner table. For each row in the outer table, Oracle finds all rows in the inner table that satisfy the join condition.
What is pruning in SAP HANA?
Union node pruning allows the data sources in union nodes to be pruned. It is based on defined criteria that at runtime exclude specific data sources from the processing. This helps reduce resource consumption and benefits performance.
What are the performance tuning techniques in SAP ABAP?
ABAP Performance tips
- Using all the keys in SELECT statement.
- Avoid SELECT *
- Fetching Single Record.
- Avoid SELECT-ENDSELECT.
- Using Indexes.
- Avoid “INTO CORRESPONDING”
- SELECT statement inside LOOP.
- Nested SELECT statement.
How many types of CDS views are there?
CDS views exist in 2 flavours, namely, ABAP CDS views and HANA CDS views. One of the common needs in an organization is the ability to do analytics and real time data reporting on transactional data.
How do you perform aggregation in CDS view?
The data type of the result is defined when the CDS view is activated and is determined by the aggregate function and the value range of the data types of the operands. Aggregate expressions can be used as elements of a SELECT list….
| Aggregate Function | Meaning |
|---|---|
| SUM | Sum of operand (the operand must be numeric). |
What are the other three engines which are part of SAP HANA?
Different Engine types in SAP HANA Architecture
- Join Engine.
- OLAP Engine.
- Calculation Engine.
- Join Engine.
What is planviz?
Akash Kumar Plan Viz Improving SAP HANA Perfo rm ance ~ Rheinwerk® Bonn • Boston fWhat You’ll Learn PlanViz is a built-in SAP HANA performance tool that provides information about the runtime of specific queries on data models.
What is planviz in SAP HANA?
The developer has to understand the processing of views, stored procedures, and more in SAP HANA to develop an optimized application. In cases where an application is performance-intensive, then the devel- oper has to investigate and resolve any issues with the available tools in SAP HANA. One such tool is Plan Visualization (PlanViz) .
Can planviz PLV-file be created from Hana studio?
This section shows the PlanViz plv-file can be created directly from HANA Studio. Display and analysis can only be done in the HANA Studio. Before jumping right into the analysis you should invest a few minutes to evaluate the consistency of the plan. 2. The Consistency Check – Beware of Useless Plans
How do I export a planviz visualization?
Exporting a PlanViz visualization can be done in the following two ways (see Figure 53): » Right-click on the visualized plan and choose SAVE As from the SQL context menu. The visualized plan will be exported in a .plv extension file. The exported .plv file contains all the runtime information.