How To Fix UGMD391 - Overflow of shared memory

UGMD391 - Overview

• Message type: E = Error

• Message class: UGMD - FIN Master Data: Messages

• Message number: 391

• Message text: Overflow of shared memory

What causes this issue?

Overflow of shared memory.

System Response

The system has temporarily deactivated use of the shared memory on
application server &V1&. This has a negative effect on performance.

How to fix this error?

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

Increase the memory space reserved for the shared memory. Call up
transaction <DS:TRAN.RZ11>Profile Parameter Maintenance</> and change
the following parameters:
<ZK>rsdb/esm/buffersize_kb</>
<ZK>rsdb/esm/max_objects</>

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message UGMD391 - Overflow of shared memory ?

  The SAP error message UGMD391, which indicates an "Overflow of shared memory," typically occurs when the shared memory allocated for a particular SAP instance is exceeded. This can happen due to various reasons, such as high load on the system, inefficient memory usage by applications, or misconfiguration of memory parameters.
  Causes:
  
  High Load: A sudden increase in user activity or background jobs can lead to excessive memory consumption.
  
  Configuration Issues: Incorrect settings in the SAP memory parameters (like abap/heap_area_total, abap/heap_area_dia, etc.) can lead to insufficient memory allocation.
  Memory Leaks: Certain applications or custom code may have memory leaks, causing memory to be consumed without being released.
  Insufficient Shared Memory Allocation: The shared memory settings in the operating system may not be sufficient for the needs of the SAP instance.
  
  Solutions:
  
  
  Increase Shared Memory Allocation:
  
  Adjust the shared memory settings in the operating system. For example, on Linux, you can modify the /etc/sysctl.conf file to increase the kernel.shmmax and