How To Fix RT577 - &1 > &2 Number of users logged on to application server exceeds threshold

SAP Error Message - Details

• Message type: E = Error

• Message class: RT - Monitoring infrastructure MSG and alert texts

• Message number: 577

• Message text: &1 > &2 Number of users logged on to application server exceeds threshold

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

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Smart SAP Assistant

• What is the cause and solution for SAP error message RT577 - &1 > &2 Number of users logged on to application server exceeds threshold ?

  The SAP error message RT577 indicates that the number of users logged onto an application server has exceeded a predefined threshold. This can lead to performance issues or system instability if not managed properly. Here’s a breakdown of the cause, potential solutions, and related information for this error:
  Cause:
  
  User Limit Exceeded: The application server has a maximum number of allowed user connections, which is defined in the system configuration. When this limit is exceeded, the error message is triggered.
  Configuration Settings: The threshold for the maximum number of users may be set too low for the current usage patterns of the system.
  Session Management: Users may not be logging off properly, leading to an accumulation of active sessions.
  Resource Constraints: The server may be experiencing resource constraints (CPU, memory) that limit the number of concurrent users it can handle effectively.
  
  Solutions:
  
  
  Increase User Limit:
  
  You can increase the maximum number of users allowed on the application server by adjusting the configuration settings in the SAP system. This can be done in the instance profile (RZ10) by modifying the parameter rdisp/MaxUser.
  Example: If the current setting is 200, you might increase it to 300 or more, depending on your server capacity.
  
  
  
  Session Management:
  
  Encourage users to log off when they are done with their sessions to free up resources.
  Implement session timeouts for inactive users to automatically log them off after a certain period.
  
  
  
  Monitor User Activity:
  
  Use transaction codes like SM04 or AL08 to monitor active user sessions and identify any users that may be consuming excessive resources or not logging off.
  
  
  
  Load Balancing:
  
  If you have multiple application servers, consider implementing load balancing to distribute user connections more evenly across servers.
  
  
  
  Performance Tuning:
  
  Review and optimize the performance of the application server to ensure it can handle the maximum number of users effectively. This may involve hardware upgrades or configuration tuning.
  
  
  
  Review System Logs:
  
  Check system logs for any underlying issues that may be contributing to the problem, such as memory leaks or other performance bottlenecks.
  
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to RT577 for any specific recommendations or patches that may address this issue.
  Documentation: Review SAP documentation on system parameters and user management for best practices.
  System Monitoring Tools: Utilize SAP Solution Manager or other monitoring tools to keep track of system performance and user activity.
  
  By addressing the underlying causes and implementing the suggested solutions, you can mitigate the occurrence of the RT577 error and improve the overall performance and stability of your SAP system.