The Operating System Layer
Like the Linux model, the Operating System layer of the AIX model too is mapped to a SystemDetails test that tracks the CPU and memory utilization, and a DiskSpace test that monitors the disk utilization. Also, similar to the Linux model, the Operating System layer of the AIX model too measures CPU usage, memory usage, IO waits, swap usage, and uptime of the host. All these tests have been discussed elaborately in The Operating System Layer
Figure 1 : Tests that map to the Operating System layer of an AIX server
The difference however lies in the SystemDetails test and the DiskActivity test of the AIX model. While you will find subtle differences in the parameters of the SystemDetails test of Linux and AIX hosts, the metrics reported by this test will slightly vary for the Linux and AIX models.