The Input/Output Processor (IOP) Utilizations section of the Component report shows the input/output processor (IOP) utilization for communications, direct access storage devices (DASDs), multifunction (DASD, communication, and local work stations). Consistent utilization, at or above the threshold value of the DASD IOP and multifunction IOP, will affect system performance and cause longer response times or less throughput.
The total for the I/O processor utilization often times does not match the sum of the three columns (IOP Processor Util Comm, IOP Processor Util LWSC, and IOP Processor Util DASD). This mismatch is caused by the utilization of other small components, such as system time.
Component Report 10/02/03 17:12:15 IOP Utilizations Page 345 Perf data from 14:00 to 16:00 at 1 min Member . . . : Q275140000 Model/Serial . : 890/10-3907F
Main storage . . : 56.4 GB Started . . . . : 10/02/03 14:00:00 Library . . : PTLIBV5R3 System name . . : ABSYSTEM
Version/Release : 5/ 3.0 Stopped . . . . : 10/02/03 16:00:00 Partition ID : 003 Feature Code . :7427-2498-7427
Int Threshold . : .00 %
Virtual Processors: 4 Processor Units : 4.0 --- IOP Processor Util --- DASD -- KBytes Transmitted -- Available IOP Total Comm LWSC DASD Ops/Sec IOP System Storage Util 2 -------------------- ----- ----- ----- ----- ----------- ----------- ----------- ----------- ------
CMB05 (2843) .4 .0 .0 .0 54 0 65,038,208 .0 CMB06 (2843) .0 .0 .0 .0 72 0 63,717,218 .0 CMB07 (2843) .5 .2 .0 .1 488 0 53,520,379 .0 CMB08 (2843) 3.2 .0 .0 1.9 1,314 0 61,607,496 .0 CMB09 (2843) .3 .0 .0 .1 249 0 61,645,950 .0 CMB10 (2843) .3 .2 .0 .0 6,885 256 55,139,610 .0 CMB11 (2843) 1.9 1.6 .0 .0 147,424 0 53,390,615 .0 IOP -- Resource name and model number for each communications, DASD,
multifunction, and local work station IOP IOP Processor Util Total -- Total utilization for IOP IOP Processor Util Comm -- Utilization of IOP due to communications activity IOP Processor Util LWSC -- Utilization of IOP due to local work station activity IOP Processor Util DASD -- Utilization of IOP due to DASD activity DASD Ops/Sec -- Disk operations per second KBytes Transmitted IOP -- Total Kbytes transmitted from an IOP to the system across the bus KBytes Transmitted System -- Total Kbytes transmitted to the IOP from the system across the bus Available Storage -- The average number of bytes of free local storage in the IOP Util 2 -- Utilization of co-processor