How To Fix SDBALM081 - Setting of the parameter OMS_HEAP_LIMIT

SAP Error Message - Details

• Message type: E = Error

• Message class: SDBALM - SAP DB and liveCache Alert Monitoring

• Message number: 081

• Message text: Setting of the parameter OMS_HEAP_LIMIT

Description
The heap usage in % can only be calculated if the upper limit of the
heap size is known through a value > 0 for parameter OMS_HEAP_LIMIT. If
OMS_HEAP_LIMIT has the value 0, the system does not display any
information in the "Heap Usage" node.
Data Collector
<ZH>Collector B</>
(RZ20 -> SAP CCMS Technical Experts Monitors -> All Monitoring Contexts
,,-> <Name of the database connection> -> Collectors and Internals
-> Collectors -> Collector B)

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

Preset runtime interval of Collector B: 15 minutes

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message SDBALM081 - Setting of the parameter OMS_HEAP_LIMIT ?

  The SAP error message SDBALM081, which pertains to the parameter OMS_HEAP_LIMIT, typically indicates that the limit for the heap memory allocated to the Online Message Service (OMS) has been reached or is not set correctly. This can lead to performance issues or failures in message processing within the SAP system.
  Cause:
  
  Heap Memory Limit Reached: The OMS is unable to allocate more memory because it has reached the configured limit.
  Configuration Issues: The parameter OMS_HEAP_LIMIT may not be set appropriately for the workload or the system's available resources.
  High Load: An increase in the number of messages being processed or a spike in system load can lead to the heap limit being reached.
  Memory Leaks: There may be underlying issues in the application or configuration that are causing memory leaks, leading to exhaustion of available heap memory.
  
  Solution:
  
  
  Increase OMS_HEAP_LIMIT:
  
  You can increase the value of the OMS_HEAP_LIMIT parameter. This can be done through the SAP transaction code RZ10 (for profile parameters) or by modifying the instance profile directly.
  Example: If the current value is set to 512 MB, you might consider increasing it to 1024 MB or more, depending on your system's capacity and requirements.
  
  
  
  Monitor Memory Usage:
  
  Use transaction SM50 or SM66 to monitor the memory usage of the OMS and other processes. This can help identify if the system is under heavy load or if there are specific processes consuming excessive memory.
  
  
  
  Review System Configuration:
  
  Ensure that the overall system configuration is optimized for the workload. This includes checking other memory-related parameters and ensuring that the system has sufficient physical memory.
  
  
  
  Check for Memory Leaks:
  
  Investigate if there are any memory leaks in the application or custom code that could be causing excessive memory consumption. This may require debugging or profiling the application.
  
  
  
  Restart the OMS:
  
  In some cases, restarting the OMS can temporarily alleviate the issue, but it is essential to address the root cause to prevent recurrence.
  
  
  
  Consult SAP Notes:
  
  Check the SAP Support Portal for any relevant SAP Notes that may provide additional guidance or patches related to this error.
  
  
  
  Related Information:
  
  Parameter Documentation: You can find detailed documentation about the OMS_HEAP_LIMIT parameter in the SAP Help Portal or through the SAP system's parameter documentation.
  Performance Tuning: Consider engaging in performance tuning activities to optimize the overall system performance, which may help in managing memory usage more effectively.
  SAP Community: Engaging with the SAP Community forums can provide insights from other users who may have faced similar issues.
  
  Always ensure to back up your configuration before making changes and, if necessary, consult with your SAP Basis team or SAP support for assistance tailored to your specific environment.