An R/3 instance runs within an operating system. The operating system provides the R/3 instance with the following resources:

• Virtual memory

• Physical memory

• CPU

• File system management

• Physical disk

• Network

Bottlenecks in these areas can significantly affect R/3 System performance. The CCMS operating system monitor allows you to monitor these resources.

The operating system monitor helps you to identify the cause of a performance problem. If the source of the problem is in the operating system, it can be analyzed further and resolved using external tools or other external means.

The performance indicators are

• CPU load average and utilization

• Memory utilization

• System swapping information (replaced by pool data in the OS/400 operating system monitor.)

• Disk utilization information

• LAN activity

• OS configuration parameters