The SGEN (SAP Load Generator) transaction is used to generate ABAP loads for various programs, function groups, and other components in SAP systems.
While it is a critical step in system maintenance and upgrades, it can be time-consuming. Below are strategies and considerations to optimize the SGEN process.
Key Strategies to Speed Up the SGEN Process
Increase the Number of Work Processes
If you only have one AP server and want to tune it easily, just increase the work processes from the RZ10 transaction. Since it depends on the case, I wrote also the information on the RZ12 for reference.
Parallel Processing: SGEN uses dialog work processes to compile ABAP programs. Increasing the number of parallel dialog work processes can significantly accelerate the process.
Use transaction RZ12 to configure the RFC group parallel_generators. This ensures that the maximum number of dialog processes is used for parallelization.
Adjust settings such as Max. Number of WPs Used (%) in RZ12 to allocate up to 90% of available work processes for SGEN if no other users are active during the process.
Optimize Server Resources
In many cases, performance tuning is possible simply by increasing the number of CPUs and work processes. You probably won’t need more memory, IOPS or throughput.
In a cloud environment, it is easy to change the number of CPUs by changing the instance type. Choosing a CPU-specific instance will also improve cost performance 
CPU Configuration: The number of CPUs directly impacts SGEN performance. Systems with more CPUs can handle more parallel processes, reducing runtime.
Memory and Database Performance: Ensure sufficient memory and database performance as these are critical for handling the heavy load generated by SGEN. Tools like ST04 can help monitor database performance.
IOPS: High IOPS is essential for handling multiple small, random I/O operations efficiently. This is particularly important because SGEN generates ABAP loads, which involve frequent access to database tables like REPOSRC and REPOLOAD. Using storage solutions with high IOPS capabilities, such as NVMe SSDs, can significantly enhance performance.
Throughput: Throughput measures the volume of data transferred per second and is crucial for sequential read/write operations. For SGEN, which involves processing large amounts of data, high throughput ensures faster data transfer between storage and the application.
Balance Work Processes
Avoid overloading the server with too many work processes, as this can lead to inefficiencies or “thrashing.” The optimal number of work processes depends on your server specifications.
Monitor CPU and memory utilization during SGEN execution to ensure resources are not overburdened.
Use Efficient Execution Modes
I shared information for the sake of best practices, but I think that in most cases you’d better to choose Generate All Objects of Selected Software Components
SGEN Execution Modes
Generate All Objects of Selected Software Components
This mode generates ABAP loads for all objects within the selected software components. It is typically used after a system installation or upgrade
Resume Previous Generation Run
This mode continues from where a previous SGEN run was interrupted, generating only the objects that were not completed earlier.
Regenerate Existing LoadsALL: Regenerates all existing ABAP loads in the system.INVALID: Regenerates only invalidated loads, which may occur after an upgrade or patch application.
Generate for Transport Requests
Generates ABAP loads for objects included in specific transport requests.
Generate Business Server Pages (BSP) and Web Dynpro Applications
Focuses on generating ABAP loads for BSP applications and Web Dynpro components.
Notes
Schedule During Off-Peak Hours
Run SGEN during times when system usage is minimal (e.g., weekends or nights) to maximize resource availability and minimize interference with other processes.
The SGEN (SAP Load Generator) transaction is used to generate ABAP loads for various programs, function groups, and other components in SAP systems.While it is a critical step in system maintenance and upgrades, it can be time-consuming. Below are strategies and considerations to optimize the SGEN process. Key Strategies to Speed Up the SGEN Process Increase the Number of Work ProcessesIf you only have one AP server and want to tune it easily, just increase the work processes from the RZ10 transaction. Since it depends on the case, I wrote also the information on the RZ12 for reference. Parallel Processing: SGEN uses dialog work processes to compile ABAP programs. Increasing the number of parallel dialog work processes can significantly accelerate the process. Use transaction RZ12 to configure the RFC group parallel_generators. This ensures that the maximum number of dialog processes is used for parallelization.Adjust settings such as Max. Number of WPs Used (%) in RZ12 to allocate up to 90% of available work processes for SGEN if no other users are active during the process.Optimize Server ResourcesIn many cases, performance tuning is possible simply by increasing the number of CPUs and work processes. You probably won’t need more memory, IOPS or throughput.In a cloud environment, it is easy to change the number of CPUs by changing the instance type. Choosing a CPU-specific instance will also improve cost performance CPU Configuration: The number of CPUs directly impacts SGEN performance. Systems with more CPUs can handle more parallel processes, reducing runtime.Memory and Database Performance: Ensure sufficient memory and database performance as these are critical for handling the heavy load generated by SGEN. Tools like ST04 can help monitor database performance.IOPS: High IOPS is essential for handling multiple small, random I/O operations efficiently. This is particularly important because SGEN generates ABAP loads, which involve frequent access to database tables like REPOSRC and REPOLOAD. Using storage solutions with high IOPS capabilities, such as NVMe SSDs, can significantly enhance performance.Throughput: Throughput measures the volume of data transferred per second and is crucial for sequential read/write operations. For SGEN, which involves processing large amounts of data, high throughput ensures faster data transfer between storage and the application.Balance Work ProcessesAvoid overloading the server with too many work processes, as this can lead to inefficiencies or “thrashing.” The optimal number of work processes depends on your server specifications.Monitor CPU and memory utilization during SGEN execution to ensure resources are not overburdened.Use Efficient Execution ModesI shared information for the sake of best practices, but I think that in most cases you’d better to choose Generate All Objects of Selected Software ComponentsSGEN Execution ModesGenerate All Objects of Selected Software ComponentsThis mode generates ABAP loads for all objects within the selected software components. It is typically used after a system installation or upgrade Resume Previous Generation RunThis mode continues from where a previous SGEN run was interrupted, generating only the objects that were not completed earlier.Regenerate Existing LoadsALL: Regenerates all existing ABAP loads in the system.INVALID: Regenerates only invalidated loads, which may occur after an upgrade or patch application.Generate for Transport RequestsGenerates ABAP loads for objects included in specific transport requests.Generate Business Server Pages (BSP) and Web Dynpro ApplicationsFocuses on generating ABAP loads for BSP applications and Web Dynpro components.NotesSchedule During Off-Peak HoursRun SGEN during times when system usage is minimal (e.g., weekends or nights) to maximize resource availability and minimize interference with other processes. Read More Technology Blogs by Members articles
#SAP
#SAPTechnologyblog
Who’s Your Money On?! 
Ex-Pro Cyclist Or Current Pro Mountain Bikers? 
