How To Fix 00855 - Maximum allowed amount of heap memory (abap/heap_area_total)

SAP Error Message - Details

• Message type: E = Error

• Message class: 00 -

• Message number: 855

• Message text: Maximum allowed amount of heap memory (abap/heap_area_total)

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.

What else can you do?

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.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message 00855 - Maximum allowed amount of heap memory (abap/heap_area_total) ?

  The SAP error message 00855, which states "Maximum allowed amount of heap memory (abap/heap_area_total) exceeded," indicates that the ABAP program has exceeded the maximum limit of heap memory allocated for the ABAP runtime environment. This can occur due to various reasons, such as inefficient coding, memory leaks, or processing large datasets.
  Causes:
  
  Inefficient Code: Poorly optimized ABAP code that consumes excessive memory.
  Large Data Processing: Processing large internal tables or datasets without proper handling can lead to high memory consumption.
  Memory Leaks: Objects that are not properly released or cleaned up can lead to memory leaks, causing the heap memory to fill up.
  Configuration Limits: The system configuration may have a low limit set for the heap memory.
  
  Solutions:
  
  
  Optimize ABAP Code:
  
  Review and optimize the code to ensure efficient memory usage. Avoid unnecessary data retrieval and processing.
  Use appropriate data types and structures. For example, use HASHED TABLE or SORTED TABLE where applicable.
  Limit the size of internal tables and use pagination or chunking techniques when processing large datasets.
  
  
  
  Increase Heap Memory Limit:
  
  If the application genuinely requires more memory, consider increasing the heap memory limit. This can be done by adjusting the profile parameters in the instance profile:
  
  abap/heap_area_total: This parameter controls the total heap memory available for ABAP programs.
  
  
  To change this parameter, you can use transaction RZ10 to edit the instance profile and then restart the instance for the changes to take effect.
  
  
  
  Monitor Memory Usage:
  
  Use transaction ST02 (Tune Summary) to monitor memory usage and identify any potential issues.
  Analyze memory consumption patterns and identify any long-running transactions that may be consuming excessive memory.
  
  
  
  Garbage Collection:
  
  Ensure that objects are properly released after use. Use the FREE statement for internal tables and objects that are no longer needed.
  Implement proper exception handling to ensure that resources are released even in error scenarios.
  
  
  
  Review Background Jobs:
  
  If the error occurs in background jobs, review the job's logic and data processing to ensure it is optimized for memory usage.
  
  
  
  Related Information:
  
  SAP Notes: Check for relevant SAP Notes that may provide additional insights or patches related to memory management.
  Performance Tuning: Consider engaging in performance tuning sessions to identify and rectify memory-related issues.
  Documentation: Refer to SAP documentation on memory management and best practices for ABAP programming.
  
  By addressing the underlying causes and implementing the suggested solutions, you can resolve the error and improve the overall performance of your ABAP programs.