Error
Error Code:
1806
SAP S/4HANA Error 1806: Shared Memory Allocation Failure
Description
This error signifies that the SAP S/4HANA system, or a specific process within it, failed to allocate a required shared memory segment. It typically occurs when the operating system's shared memory resources are exhausted or configured below the SAP application's demands, leading to system instability or process termination.
Error Message
ERR_SHM_ATTACH_NO_MORE_MEMORY
Known Causes
4 known causesInsufficient OS SHM Configuration
Operating system parameters for shared memory (e.g., SHMMAX, SHMALL, SHMSEG) are set too low to accommodate SAP S/4HANA's memory requirements.
System Resource Exhaustion
Other processes or applications on the server are consuming excessive memory, leaving insufficient free resources for SAP to allocate new shared memory segments.
Incorrect SAP Profile Parameters
SAP S/4HANA profile parameters related to memory management (e.g., `em/initial_size_MB`) are misconfigured, requesting more shared memory than is available or allowed by the OS.
Kernel Memory Leak
An underlying issue or bug in the SAP kernel or an application component is causing a gradual, unreleased consumption of shared memory, leading to eventual exhaustion.
Solutions
Coming SoonDetailed step-by-step solutions for this error are being prepared. In the meantime, try these general troubleshooting tips:
General Troubleshooting Tips
- Check the error message carefully for specific details
- Review recent changes that might have caused the error
- Search for the exact error code in the official documentation
- Check log files for additional context
- Try restarting the application or service