How To Fix GW631 - Maximum number of SAP gateways reached

SAP Error Message - Details

• Message type: E = Error

• Message class: GW - Message Texts for Gateway

• Message number: 631

• Message text: Maximum number of SAP gateways reached

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.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message GW631 - Maximum number of SAP gateways reached ?

  The SAP error message GW631 ("Maximum number of SAP gateways reached") typically indicates that the maximum number of SAP Gateway connections has been reached. This can occur in environments where there are many users or processes trying to connect to the SAP system simultaneously, leading to resource exhaustion.
  Causes:
  
  High User Load: A large number of users or processes trying to connect to the SAP system at the same time.
  Configuration Limits: The SAP Gateway has a configured limit for the maximum number of connections, which may be set too low for the current usage.
  Resource Exhaustion: Insufficient system resources (CPU, memory) can lead to the inability to handle new connections.
  Long-Running Sessions: Existing sessions that are not being terminated properly can consume available connections.
  Network Issues: Problems in the network can lead to connections not being released properly.
  
  Solutions:
  
  
  Increase Gateway Connections:
  
  You can increase the maximum number of gateway connections by adjusting the parameter gw/max_conn in the SAP profile. This can be done through transaction RZ10 or by editing the instance profile directly.
  Example: Set gw/max_conn to a higher value (e.g., 200 or more, depending on your needs).
  
  
  
  Monitor and Manage Sessions:
  
  Use transaction SM04 to monitor active user sessions and identify any long-running or idle sessions that can be terminated.
  Regularly check for and clean up any orphaned or inactive sessions.
  
  
  
  Optimize Resource Usage:
  
  Ensure that the SAP system has adequate resources (CPU, memory) to handle the expected load.
  Consider scaling up the hardware or optimizing the application to reduce resource consumption.
  
  
  
  Review Network Configuration:
  
  Check for any network issues that might be causing connections to hang or not be released properly.
  Ensure that firewalls or network devices are not interfering with SAP Gateway connections.
  
  
  
  Implement Load Balancing:
  
  If applicable, consider implementing load balancing to distribute the load across multiple SAP application servers.
  
  
  
  Check for System Updates:
  
  Ensure that your SAP system is up to date with the latest patches and updates, as these may contain fixes for known issues.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SMGW: Monitor the SAP Gateway.
  SM04: User overview to check active sessions.
  RZ10: Profile maintenance to change parameters.
  
  
  
  SAP Notes: Check SAP Notes related to the GW631 error for any specific recommendations or fixes provided by SAP.
  
  
  Documentation: Review SAP documentation for best practices on managing SAP Gateway connections and performance tuning.
  
  
  By following these steps, you should be able to resolve the GW631 error and improve the performance of your SAP system.