CPU usage distribution

This section shows a breakdown of CPU active TCB observations. CPU active observations are broken down by categories: Application code, System services, DB2® and Data management.

Under heading	This is displayed
CPU Active	The number of observations of CPU Active TCBs. This value could be higher than the number of CPU Active samples because each CPU Active TCB is counted. Two or more TCBs could be serviced concurrently by separate CPUs. The percentage value indicates the ratio of the total number of CPU Active samples to the total number of samples completed so far. The first histogram represents this percentage and shows the proportion of the overall measurement time for which CPU activity was observed. The second sample count shows the number of CPU Active TCB observations in the current time slice.
Application	The number of CPU Active TCB observations in which execution was observed in application programs. This is a subset of the CPU Active observation count. The percentage value indicates the ratio of the number of application program observations to the number of CPU Active observations. The first histogram represents this percentage and shows the proportion of the overall CPU time for which CPU activity was observed in application code. The second count shows the number of application code CPU Active observations in the current time slice. The histogram represents the proportion of CPU time in application code in this time slice.
System	The number of CPU Active TCB observations in which execution was observed in system services. This is a subset of the CPU Active observation count. The percentage value indicates the ratio of the number of system services observations to the number of CPU Active observations. The first histogram represents this percentage and shows the proportion of the overall CPU time for which CPU activity was observed in system routines. The second count shows the number of system services CPU Active observations in the current time slice. The histogram represents the proportion of CPU time in system services in this time slice.
DB2 SQL	The number of CPU Active TCB observations in which execution was in DB2 routines servicing SQL requests. This is a subset of the CPU Active observation count. The percentage value indicates the ratio of the number of DB2 observations to the number of CPU Active observations. The first histogram represents this percentage and shows the proportion of the overall CPU time for which CPU activity was observed to be processing SQL requests. The second count shows the number of DB2 services CPU Active observations in the current time slice. The histogram represents the proportion of CPU time in DB2 services in this time slice.
Data management	The number of CPU Active TCB observations in which execution was in the servicing of Data Management requests. This is a subset of the CPU Active observation count. The percentage value indicates the ratio of the number of Data Management service observations to the number of CPU Active observations. The first histogram represents this percentage and shows the proportion of the overall CPU time for which CPU activity was observed to be processing Data Management requests. The second count shows the number of Data Management services CPU Active observations in the current time slice. The histogram represents the proportion of CPU time in Data Management services in this time slice.
Unresolved	The number of CPU Active TCB observations in which execution was in object code in storage locations for which no load module information could be obtained. This can occur for modules fetched into CSA by a region other than the one being measured. This quantity is a subset of the CPU Active observation count. The percentage value indicates the ratio of the number of unresolved location observations to the number of CPU Active observations. The first histogram represents this percentage and shows the proportion of the overall CPU time for which CPU activity was observed to be in unresolved storage locations. The second count shows the number of unresolved storage location CPU Active observations in the current time slice. The histogram represents the proportion of CPU time in unresolved storage locations in this time slice.