How To Fix RSDD_ZA155 - Check for checks that have been deactivated because of MemWatcher

SAP Error Message - Details

• Message type: E = Error

• Message class: RSDD_ZA - Messages from TREX Aggregate Area

• Message number: 155

• Message text: Check for checks that have been deactivated because of MemWatcher

What causes this issue?

The system checks whether MemWatcher is activated and which functions it
executes. Depending on the results, certain alert server checks are
deactivated since MemWatcher automatically resolves the problems
recorded by these checks.

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 RSDD_ZA155 - Check for checks that have been deactivated because of MemWatcher ?

  The SAP error message RSDD_ZA155 indicates that certain checks in the system have been deactivated due to the MemWatcher, which is a memory monitoring tool used in SAP BW (Business Warehouse). This message typically arises when the system detects that memory usage is exceeding certain thresholds, leading to the deactivation of checks to prevent performance degradation or system instability.
  Cause:
  
  
  High Memory Usage: The MemWatcher is triggered when the system's memory consumption exceeds predefined limits. This can happen due to various reasons, such as:
  
  Large data loads or queries that consume significant memory.
  Inefficient data models or queries that require excessive resources.
  Insufficient system resources (e.g., RAM) allocated to the SAP BW system.
  
  
  
  Deactivated Checks: To maintain system stability, the MemWatcher may deactivate certain checks that are resource-intensive, which can lead to the error message RSDD_ZA155.
  
  
  Solution:
  
  
  Monitor Memory Usage: Use transaction codes like ST02 (Tune Summary) and ST03N (Workload Analysis) to monitor memory usage and identify any bottlenecks or high-consuming processes.
  
  
  Optimize Queries and Data Models:
  
  Review and optimize queries that are consuming excessive memory.
  Consider aggregating data or using summary tables to reduce the load on the system.
  Ensure that data models are designed efficiently to minimize resource consumption.
  
  
  
  Increase System Resources: If the system frequently runs into memory issues, consider increasing the physical memory (RAM) allocated to the SAP BW system.
  
  
  Adjust MemWatcher Settings: If necessary, you can adjust the MemWatcher settings to change the thresholds for memory usage. However, this should be done with caution and ideally under the guidance of an SAP Basis consultant.
  
  
  Check for Updates: Ensure that your SAP system is up to date with the latest patches and updates, as performance improvements and bug fixes may help alleviate memory issues.
  
  
  Consult SAP Notes: Look for relevant SAP Notes that may provide additional guidance or solutions specific to your version of SAP BW.
  
  
  Related Information:
  
  SAP BW Memory Management: Understanding how memory is managed in SAP BW can help in optimizing performance.
  Transaction Codes: Familiarize yourself with transaction codes like ST02, ST03N, and RSCUSTV10 for monitoring and tuning performance.
  SAP Community and Forums: Engaging with the SAP community can provide insights and solutions from other users who may have faced similar issues.
  
  If the problem persists after trying the above solutions, it may be beneficial to consult with SAP support or a qualified SAP consultant for a more in-depth analysis of the issue.