How To Fix DB6PM520 - Error reading from shared memory instance &1

SAP Error Message - Details

• Message type: E = Error

• Message class: DB6PM - DB2 UDB for UNIX, Windows: Performance Monitoring

• Message number: 520

• Message text: Error reading from shared memory instance &1

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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First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

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Smart SAP Assistant

• What is the cause and solution for SAP error message DB6PM520 - Error reading from shared memory instance &1 ?

  The SAP error message DB6PM520, which indicates "Error reading from shared memory instance &1," typically relates to issues with the database connection or the shared memory configuration in the SAP environment. Here’s a breakdown of the potential causes, solutions, and related information:
  Causes:
  
  Shared Memory Configuration Issues: The shared memory instance may not be properly configured or initialized.
  Database Connection Problems: There may be issues with the database connection, such as the database being down or network issues.
  Insufficient Memory: The system may not have enough memory allocated for the shared memory instance.
  Permissions Issues: The user or process may not have the necessary permissions to access the shared memory.
  Corrupted Shared Memory: The shared memory segment may be corrupted or not properly released from a previous session.
  
  Solutions:
  
  Check Database Status: Ensure that the database is up and running. You can check the database logs for any errors or issues.
  Review Shared Memory Configuration: Verify the configuration settings for shared memory in the SAP system. This includes checking parameters in the instance profile.
  Increase Memory Allocation: If memory is insufficient, consider increasing the shared memory allocation in the SAP profile parameters.
  Check Permissions: Ensure that the user or process has the necessary permissions to access the shared memory. This may involve checking operating system-level permissions.
  Restart the SAP Instance: Sometimes, simply restarting the SAP instance can resolve issues related to shared memory.
  Check for Corruption: If you suspect corruption, you may need to clear the shared memory segments and restart the instance. Use transaction code SM04 to check for active users and sessions that may be holding onto shared memory.
  Review SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error message.
  
  Related Information:
  
  SAP Basis Administration: Understanding how shared memory works in SAP and how it is configured can help in troubleshooting.
  Database Administration: Familiarity with the database being used (e.g., Oracle, HANA, etc.) can provide insights into potential database-specific issues.
  SAP Community and Forums: Engaging with the SAP community can provide additional insights and solutions from other users who may have encountered similar issues.
  
  If the problem persists after trying the above solutions, it may be beneficial to contact SAP support for further assistance.