How To Fix DBMAN150 - The MultiProvider query is executed sequentially (reason: &1)

SAP Error Message - Details

• Message type: E = Error

• Message class: DBMAN - Data Manager Message Class

• Message number: 150

• Message text: The MultiProvider query is executed sequentially (reason: &1)

What causes this issue?

The MultiProvider currently being processed is being processed
sequentially. The reason for sequential processing is &v1&. The
relevance of &v1& is explained in the following list:
<ZH>PROC</>: At the time of execution, not enough free work processes
were available on the application sever.
<ZH>NOPA:</>: MultiProvider &v2& was explicitly set for sequential
processing (see table RSADMIN).
<ZH>ONE</>: The MultiProvider query consists of one sub-access only so
it is not possible to parallelize.
<ZH>OLAP</>: The BW OLAP processor explicitly enforces sequential
processing. This can be the result of functional constraints. A further
reason can be that the MultiProvider query was explicitly set for
sequential processing in transaction RSRT.
<ZH>ITAB</>: The result ought to be materialized in, for example, a
database table.
<ZH>NCUM</>: The query in question is processing non-cumulative key
figures.
<ZH>BTC</>: The query is being processed in a backgroung process.
<ZH>UPD</>: The query is being processed in an update process.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message DBMAN150 - The MultiProvider query is executed sequentially (reason: &1) ?

  The SAP error message DBMAN150 indicates that a MultiProvider query is being executed sequentially rather than in parallel. This can occur for various reasons, and understanding the cause is essential for finding a solution. Here’s a breakdown of the potential causes, solutions, and related information:
  Cause
  
  Data Source Characteristics: The underlying InfoProviders (e.g., InfoCubes, DataStore Objects) may not support parallel processing due to their configuration or the nature of the data.
  Query Design: The design of the query itself may lead to sequential execution. For example, if the query involves complex calculations or aggregations that cannot be parallelized.
  System Configuration: The SAP BW system may have settings that limit parallel processing, such as resource constraints or specific settings in the BW system configuration.
  Locks and Contention: If there are locks on the data being accessed or contention for resources, the system may fall back to sequential execution.
  Database Performance: The underlying database may not be optimized for parallel processing, leading to sequential execution.
  
  Solution
  
  Review Query Design: Simplify the query if possible. Avoid complex calculations or aggregations that may force sequential execution.
  Check Data Source Configuration: Ensure that the InfoProviders used in the MultiProvider are configured to allow parallel processing. This may involve checking settings in the InfoCubes or DataStore Objects.
  System Configuration: Review the BW system settings related to parallel processing. This may include adjusting parameters in the BW system or database settings to allow for more parallel execution.
  Monitor Locks and Performance: Use transaction codes like ST22 (dump analysis) or SM21 (system log) to check for locks or performance issues. Resolve any locks that may be causing contention.
  Database Optimization: Ensure that the underlying database is optimized for performance. This may involve indexing, partitioning, or other database tuning techniques.
  SAP Notes: Check for any relevant SAP Notes that may address this issue. SAP frequently releases updates and patches that can resolve known issues.
  
  Related Information
  
  Transaction Codes: Use transaction codes like RSRT (Query Monitor) to analyze the query execution and performance.
  Performance Analysis: Utilize tools like ST03N (Workload Analysis) to monitor system performance and identify bottlenecks.
  Documentation: Refer to SAP BW documentation for best practices on query design and performance optimization.
  SAP Community: Engage with the SAP Community or forums for insights from other users who may have encountered similar issues.
  
  By addressing the causes and implementing the suggested solutions, you can often resolve the DBMAN150 error and improve the performance of your MultiProvider queries in SAP BW.