IMS internals monitors
Resource monitors for IMS internals
Monitor name | Description | View name |
|---|---|---|
DBWP | Database work area pool utilization This monitor reports the percentage of the database work area pool utilization during the sampling period. | IDBWP |
DMBP | DMB pool utilization This monitor reports the percentage of the DMB pool utilization during the sampling period. | IDMBP |
DSAP | Dynamic SAP utilization This monitor reports the percentage of the dynamic save area pool utilization during the sampling period. | IDSAP |
EPCB | EPCB pool utilization This monitor reports the percentage of the extended PCB (EPCB) pool utilization during the sampling period. If Fast Path is not installed in IMS, the IEPCB plot is always zero. | IEPCB |
LAWT | Average latch wait time This monitor reports the average latch wait time in microseconds within the sampling period or since the last IMS checkpoint if a checkpoint occurs within the period. Depending on the parameters specified with the monitor, the reported value is the average wait time for all latch types or for a specific latch type. | ILAWT |
LMAWT | Latch wait time This service monitors the maximum latch wait time (in microseconds) and issues a warning if it exceeds the defined threshold. If more than one latch type exceeds the threshold, only the one with the largest average wait time is measured. | None |
LOGSW | Log switch last 10 intervals This service monitors the number of OLDS switches that occur and issues a warning if the number of switches exceeds the defined threshold. | ILOGSW |
OBUFW | OLDS buffer waits This monitor reports the number of times that the IMS logical logger had to wait for a buffer to be written to the OLDS during the sampling period. | IOBUFW |
OCHKW | OLDS check writes This monitor reports the number of check write requests to the IMS logical logger during the sampling period. | IOCHKW |
PIENQ | Program isolation enqueues by region This monitor reports the number of outstanding program isolation (PI) enqueues held by IMS regions during the sampling period. Depending on the parameters specified with the monitor, the reported value is the total number of PI enqueues held by all IMS dependent regions, by one region, or by a group of regions. | IPIENQ |
PIMAX | Maximum PI enqueues This service monitors PI enqueues. The region with the most outstanding PI enqueues exceeding the threshhold is reported. If more than one region exceeds the threshold, only the one with the most enqueues is returned. | None |
PIPL | Program isolation pool utilization This monitor reports the percentage of the program isolation (PI) pool utilization during the sampling period. PI pool percentage usage is calculated as the ratio of allocated bytes to the total number of bytes that can be assigned to the pool. | IPIPL |
POOLA | Pool allocated storage This monitor reports the amount of allocated pool storage in bytes during the sampling period. Depending on the parameters specified with the monitor, the reported value is the number of allocated bytes of CSA storage, ECSA storage, or non-CBT pool storage. | IPOOLA |
POOLN | Net expansion count This monitor reports the difference in bytes between the total expansion and total compression of blocks allocated to non-CBT fixed storage pools. | IPOOLN |
POOLT | Total expansion/compression count This monitor reports the number of times that non-CBT storage pool blocks expanded and compressed during the sampling period. Depending on the parameters specified with the monitor, the reported value is the total block expansions and compressions for all pools or the number for a specific non-CBT fixed storage pool. | IPOOLT |
PSBP | PSB pool utilization This monitor reports the percentage of the PSB pool utilization during the sampling period. If the IMS option is LSO=S, DLISAS PSB pool usage is monitored. If the LSO option is not S, total PSB pool usage is monitored. | IPSBP |
PSBW | PSB work area pool utilization This monitor reports the percentage of the PSB work area pool utilization during the sampling period. | IPSBW |
WADIO | WADS I/O This monitor reports the number of EXCPs to a write-ahead data set (WADS) during the sampling period. If dual WADS logging is in effect, the actual number of EXCPs is twice the reported number. | IWADIO |
WADRS | WADS I/O response This service monitors the response time of WADS I/O. | IWADRS |
WKAP | General work area pool utilization This monitor reports the percentage of the general work area pool utilization during the sampling period. | IWKAP |