Error
Error Code:
679
SAP S/4HANA Error 679: Missing Plan Stabilizer Manager
Description
This error indicates that the SQL Plan Stabilizer, a feature designed for query performance optimization, is deprecated and its manager component cannot be found. It typically occurs when the system attempts to utilize this outdated functionality, suggesting a need to verify current system configurations.
Error Message
ERR_SQL_PLANSTABILIZER_NO_MANAGER_DEPRECATED
Known Causes
3 known causesDeprecated Feature Usage
The SAP S/4HANA system is configured to use the SQL Plan Stabilizer, which is no longer supported or has been replaced in the current software version.
Incorrect System Configuration
System parameters or configuration files still reference the deprecated Plan Stabilizer manager, preventing the system from finding a valid component.
Post-Upgrade Configuration Drift
After a system upgrade, legacy configurations for the Plan Stabilizer might persist, leading to attempts to access a non-existent or deprecated manager.
Solutions
3 solutions available1. Re-enable Plan Stabilizer easy
This is the most direct solution, re-enabling the Plan Stabilizer component if it was accidentally disabled.
1
Access the SAP system via SAP GUI. Navigate to transaction SPRO (SAP Reference IMG).
2
Follow the path: SAP NetWeaver -> Application Server -> Basis Services -> Plan Stabilizer -> Activate Plan Stabilizer.
3
Ensure the 'Activate Plan Stabilizer' checkbox is selected. If it's unchecked, check it and save the changes.
4
After saving, restart the relevant SAP instances (e.g., application servers) for the changes to take full effect. This is crucial for the new configuration to be applied.
2. Verify and Reconfigure Plan Stabilizer Parameters medium
Check if the Plan Stabilizer is active and its parameters are correctly set in the system profile.
1
Log in to the SAP system and access transaction RZ10 (Profile Maintenance).
2
Select the relevant instance profile (or default profile if applicable) and choose 'Display'.
3
Search for parameters related to Plan Stabilizer. Key parameters to check include:
icm/server_port_<xx> = PROT=HTTP,PORT=<port_number>,TIMEOUT=<seconds>,PROCTIMEOUT=<seconds>
ps/ps_active = 14
The parameter `ps/ps_active` should be set to `1` to enable the Plan Stabilizer. If it's set to `0` or is missing, add or modify it to `1`.
5
Save the profile changes.
6
Restart the SAP instances to apply the updated profile parameters.
3. Investigate and Resolve Underlying System Issues advanced
If the Plan Stabilizer is active but the error persists, there might be deeper system issues affecting its functionality.
1
Check SAP Notes and KBA (Knowledge Base Articles) for error code 679 and the specific S/4HANA version you are using. There might be known bugs or specific configuration requirements.
2
Examine the SAP system logs (SM21) for any related error messages that occurred around the time of the Plan Stabilizer error. Look for database-related errors, memory issues, or communication problems.
3
Review the database alert logs (e.g., Oracle ALERT log, HANA trace files) for any database-level issues that could be impacting SAP's ability to interact with the Plan Stabilizer.
4
If the issue is suspected to be related to specific queries or transactions, analyze their execution plans using tools like ST05 (SQL Trace) or the database's own performance tools. This might reveal inefficient queries that are overwhelming the Plan Stabilizer or causing it to fail.
5
Consider consulting with SAP support if the root cause cannot be identified through system logs and basic parameter checks. Provide them with all relevant logs and system information.