Each month, SAP releases important security updates during SAP Security Patch Day to safeguard SAP landscapes from emerging threats. Efficiently applying these patches—especially large Support Packages or Patch Stack Updates—is crucial to maintaining system security and stability.
The Software Update Manager (SUM) is SAP’s primary tool for managing complex system updates, including applying security patches. This article explores how SUM facilitates patching on SAP Security Patch Day and provides best practices for its effective use.
SUM is a versatile, Java-based tool provided by SAP for:
- Applying Support Packages (SPs)
- Performing Patch Stack Updates (PSUs)
- Executing Kernel upgrades
- Conducting Unicode conversions and other system maintenance tasks
SUM automates many update steps, reduces manual effort, and ensures consistency during patching activities.
- Handles Large Updates: SUM efficiently manages complex Support Package and Patch Stack updates, which often contain multiple security fixes.
- Minimizes Downtime: With downtime-optimized procedures, SUM reduces system unavailability.
- Automates Steps: It streamlines patch import, code adjustments, and database tasks.
- Provides Rollback Capability: In case of issues, SUM allows controlled rollback to previous system states.
- Supports SAP NetWeaver and S/4HANA: Compatible with key SAP platforms used by most enterprises.
- Backup Systems: Always create full system backups before patching.
- Check Prerequisites: Verify SAP Notes for prerequisites, required kernel versions, and SAP Solution Manager recommendations.
- Download Relevant Files: Obtain Support Packages, PSUs, and SUM tool from SAP Service Marketplace.
- Launch SUM from a command line on the central instance host.
- The tool runs in a graphical or console mode.
- Choose the update type: Support Package, Patch Stack Update, or Kernel upgrade.
- Select target software components and patch files.
- SUM performs consistency checks.
- It analyzes system state and dependencies.
- Adjusts system configuration for patching readiness.
- SUM automatically places the system into downtime mode.
- It applies patches, imports corrections, and performs database updates.
- Tracks progress and logs every step.
- SUM reactivates the system.
- Performs validation checks.
- Provides reports on patch status and any encountered issues.
- Test in Non-Production: Always test SUM runs in sandbox or quality environments first.
- Coordinate Downtime: Schedule patching during planned maintenance windows.
- Monitor Logs: Review SUM logs closely to catch warnings or errors early.
- Communicate with Teams: Inform stakeholders about patch schedules and potential impact.
- Use SAP Solution Manager: Integrate SUM activities with SAP Solution Manager for end-to-end management.
- Keep SUM Updated: Use the latest SUM versions to leverage improvements and fixes.
- If SUM halts or errors out, check the SUM log files located in the
/usr/sap/<SID>/SUM/abap/log directory.
- Verify all prerequisite SAP Notes for your patch level.
- Ensure adequate disk space and memory are available before patching.
- Use SAP Notes and forums for known issues and solutions.
The Software Update Manager (SUM) is a powerful and reliable tool for managing SAP security patches during SAP Security Patch Day. By automating complex update processes and minimizing downtime, SUM helps organizations maintain secure and compliant SAP systems with efficiency and confidence.
For optimal results, follow best practices, thoroughly test patches, and maintain clear communication across teams involved in patching activities.