WAS v8.5 > Reference > Administrator best practicesSystem counters
We can use the system counters the Performance Monitoring Infrastructure (PMI) and Tivoli Performance Viewer collect to monitor how efficiently the system a specific machine (node) is running.
Counters for this category contain information for a machine (node).
Counter definitions
Counter definitions. The following table describes system counters.
Name Key Description Granularity Type Level Overhead ID CPUUsageSinceLastMeasurement systemModule.cpuUtilization The average system CPU utilization taken over the time interval since the last reading. Because the first call is required to perform initialization, a value such as 0, which is not valid, will be returned. All subsequent calls return the expected value. On SMP machines, the value returned is the utilization averaged over all CPUs. Per node CountStatistic Basic Low 1 CPUUsageSinceServerStarted systemModule.avgCpuUtilization The average percent CPU Usage that is busy once the server is started. Per node TimeStatistic Extended Medium 2 FreeMemory systemModule.freeMemory The amount of real free memory available on the system. Real memory not allocated is only a lower bound on available real memory, since many operating systems take some of the otherwise unallocated memory and use it for additional I/O buffering. The exact amount of buffer memory which can be freed up is dependent on both the platform and the application(s) running on it. Per node CountStatistic All Low 3
Related
Monitoring overall system health
Reference:
PMI data organization