Learn RPG4 with Real Code Examples
Updated Nov 27, 2025
Performance Notes
Prefer SQL over native I/O when possible
Use service programs for shared logic
Optimize data structures and indexing
Limit activation group overhead
Use commitment control wisely
Security Notes
Leverage IBM i object-level security
Adopt least-privilege library access
Validate input for APIs
Monitor adopted authority usage
Control DB file access permissions
Monitoring Analytics
Job logs
Db2 performance traces
SQL plan analysis
Journal monitoring
System APIs for program analysis
Code Quality
Use service programs for reuse
Prefer free-form syntax
Adopt modular structure
Centralize error handling
Standardize naming conventions