| Data Category | 
		Description of Data | 
		When Data Is Collected | 
	
	
		| Cluster configuration and communication (CFG) | 
		Characterizes the communication of the system with other cluster members. | 
		For each cluster connection, this data is recorded once during each recording interval, resulting in the writing of an array of records. | 
	
	
		| CPU utilization (CPU) | 
		Characterizes the performance of individual CPUs attached to the system. | 
		For each CPU, this data is recorded once during each recording interval, resulting in the writing of an array of records. | 
	
	
		| Disk performance (DEV) | 
		Characterizes the utilization and performance of the disks that are visible to the system. | 
		For each disk, this data is recorded once during each recording interval, resulting in the writing of an array of records. | 
	
	
		| Systemwide performance metrics (MET) | 
		Characterizes overall system performance. | 
		This data is recorded once during each recording interval. | 
	
	
		| System parameters (PAR) | 
		Lists parameters that are assumed to remain constant during each recording session. | 
		This data is stored once, at the start of each recording session. | 
	
	
		| Process (PRO) | 
		Characterizes the utilization of system resources by each process running on the system. | 
		For each process, this data is recorded once during each recording interval, resulting in the writing of an array of records. |