How To Fix VIRT331 - WLM LPAR Weight Management

SAP Error Message - Details

• Message type: E = Error

• Message class: VIRT - Virtualization Monitoring

• Message number: 331

• Message text: WLM LPAR Weight Management

WLM LPAR Weight Management
If WLM LPAR Weight Management is enabled:
WLM will then dynamically balance these weights (see LPAR Weights CP /
IIP) to best meet the goals of the work in the partitions.

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message VIRT331 - WLM LPAR Weight Management ?

  The SAP error message VIRT331 related to WLM (Workload Management) and LPAR (Logical Partition) weight management typically indicates an issue with the configuration of workload management settings in a z/OS environment. This error can arise when the system is unable to allocate resources effectively due to misconfigured weights or other related parameters.
  Cause:
  
  Improper Weight Configuration: The weights assigned to different LPARs may not be set correctly, leading to resource allocation issues.
  Resource Contention: High contention for resources among LPARs can trigger this error, especially if the weights do not reflect the actual workload requirements.
  WLM Policy Issues: The WLM policy may not be optimized for the current workload, causing inefficiencies in resource allocation.
  System Configuration Changes: Recent changes in system configuration or workload patterns may not have been accounted for in the WLM settings.
  
  Solution:
  
  Review Weight Settings: Check the weight settings for each LPAR in the WLM configuration. Ensure that they accurately reflect the priority and resource needs of each workload.
  Adjust WLM Policies: Modify the WLM policies to better align with the current workload. This may involve adjusting service class definitions, importance levels, and other parameters.
  Monitor Resource Usage: Use monitoring tools to analyze resource usage patterns and identify any bottlenecks or contention issues. This can help in making informed adjustments to weights and policies.
  Consult Documentation: Refer to the IBM documentation for WLM and LPAR management to ensure that all settings are configured according to best practices.
  Test Changes: After making adjustments, monitor the system to ensure that the changes have resolved the issue and that resource allocation is functioning as expected.
  
  Related Information:
  
  IBM Documentation: Review the official IBM documentation for WLM and LPAR management for detailed guidance on configuration and best practices.
  SAP Notes: Check SAP Notes for any specific recommendations or patches related to this error message.
  Performance Monitoring Tools: Utilize performance monitoring tools to gain insights into workload patterns and resource usage, which can help in optimizing WLM settings.
  Support Forums: Engage with community forums or support channels for both SAP and IBM to seek advice from other users who may have encountered similar issues.
  
  If the problem persists after following these steps, it may be beneficial to engage with IBM support or your system administrator for further assistance.