How To Fix 00860 - High-water mark of extended memory management slots since startup

SAP Error Message - Details

• Message type: E = Error

• Message class: 00 -

• Message number: 860

• Message text: High-water mark of extended memory management slots since startup

What causes this issue?

Each internal session needs one such extended memory slot. (Each
external session can contain up to 9 internal sessions).

System Response

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

How to fix this error?

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 00860 - High-water mark of extended memory management slots since startup ?

  The SAP error message "00860 High-water mark of extended memory management slots since startup" indicates that the system has reached a high-water mark for the number of extended memory management slots that have been allocated since the last startup. This can lead to performance issues or even system instability if not addressed.
  Cause:
  
  Memory Allocation: The error typically arises when the system is allocating memory for various processes and has reached the limit of available extended memory slots.
  High Load: A high number of concurrent users or processes can lead to increased memory usage, causing the system to allocate more memory slots.
  Configuration Issues: The configuration settings for memory management may not be optimized for the current workload.
  Memory Leaks: There may be memory leaks in custom code or third-party add-ons that are consuming more memory than expected.
  
  Solution:
  
  Restart the System: A simple restart can clear the memory and reset the high-water mark. However, this is not a long-term solution.
  Increase Memory Allocation:
  
  Adjust the profile parameters related to memory management in the instance profile (e.g., em/initial_size_MB, em/size_MB, abap/heap_area_dia, abap/heap_area_nondia).
  Increase the size of the extended memory if the hardware allows it.
  
  
  Monitor Memory Usage: Use transaction codes like ST02 (Tune Summary) and ST06 (Operating System Monitor) to monitor memory usage and identify any bottlenecks.
  Optimize Code: Review custom ABAP code and third-party add-ons for potential memory leaks or inefficient memory usage.
  Adjust User Load: If possible, reduce the number of concurrent users or processes to alleviate memory pressure.
  Check for Updates: Ensure that your SAP system is up to date with the latest patches and updates, as these may contain fixes for memory management issues.
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to memory management and performance tuning for specific recommendations and best practices.
  SAP Documentation: Refer to the official SAP documentation for detailed information on memory management parameters and their implications.
  Performance Monitoring: Regularly monitor system performance and memory usage to proactively address potential issues before they lead to errors.
  
  By following these steps, you can address the "00860 High-water mark of extended memory management slots since startup" error and improve the overall performance and stability of your SAP system.