How To Fix D3653 - The selected buffer pool &1 is not active

SAP Error Message - Details

• Message type: E = Error

• Message class: D3 - CCMS - DB2 on OS390

• Message number: 653

• Message text: The selected buffer pool &1 is not active

What causes this issue?

The buffer pool entered is not active.

System Response

The ALTER TABLESPACE statement would fail with an SQL error.

How to fix this error?

Enter the name of an active buffer pool. You can use F4-help to choose
one of the active buffer pools.

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

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 D3653 - The selected buffer pool &1 is not active ?

  The SAP error message D3653, which states "The selected buffer pool &1 is not active," typically indicates that the system is trying to access a buffer pool that has not been activated or is not available for use. This can occur in various contexts, such as when working with database buffers or memory management in SAP systems.
  Cause:
  
  Inactive Buffer Pool: The specified buffer pool (indicated by &1) is not currently active in the system. This could be due to configuration issues or the buffer pool not being initialized properly.
  Configuration Errors: There may be errors in the configuration settings for the buffer pool in the SAP system.
  System Changes: Recent changes to the system, such as updates or migrations, may have affected the status of the buffer pool.
  Resource Limitations: The system may not have enough resources (memory, etc.) to activate the buffer pool.
  
  Solution:
  
  
  Check Buffer Pool Configuration:
  
  Go to the SAP transaction code RZ10 or RZ11 to check the profile parameters related to buffer pools.
  Ensure that the buffer pool is correctly defined and activated in the system configuration.
  
  
  
  Activate the Buffer Pool:
  
  If the buffer pool is not active, you may need to activate it. This can typically be done through the system configuration settings or by modifying the instance profile.
  
  
  
  Review System Logs:
  
  Check the system logs (transaction SM21) for any related error messages or warnings that could provide more context about why the buffer pool is inactive.
  
  
  
  Restart the Instance:
  
  In some cases, restarting the SAP instance may help in reinitializing the buffer pools and resolving the issue.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or notes related to buffer pool management for specific instructions or troubleshooting steps.
  
  
  
  Contact SAP Support:
  
  If the issue persists after trying the above steps, consider reaching out to SAP support for further assistance.
  
  
  
  Related Information:
  
  Buffer Pool: A buffer pool is a memory area used to cache data pages to improve performance by reducing the number of direct database accesses.
  SAP Notes: Check SAP Notes for any known issues or patches related to buffer pool management.
  System Performance: Proper management of buffer pools is crucial for maintaining optimal system performance, especially in high-load environments.
  
  By following these steps, you should be able to diagnose and resolve the issue related to the D3653 error message in your SAP system.