The table below shows the main monitored variables of SM2.
A table showing the links between the monitored variables and monitoring programs, ONLINE reports, and SM2R1 report groups can be found in chapter "Variables reports".
Monitored variable | Description |
Cache | |
Access statistics and hit rates for DAB caches | Number of read/write accesses to DAB cache areas per second |
Access statistics for ISAM pools and ISAM files | Number of ISAM accesses per second to pages in the ISAM pool and directly to disk, as well as the number of ISAM accesses with a delay per second |
Communication | |
Response times, transaction times, think times, transaction rates, message lengths of transactions | Data on the BCAM pool |
Number of I/Os by network devices | Number of read/write accesses per second, and the number of bytes transferred |
Network data transfer rates | Data transfer information for specific connections |
Memory for data transfer | Current and maximum sizes of the resident memory; threshold value from which BCAM issues warnings |
| Transmission rate for all TCP/IP connections | Data for IPv4 as well as IPv6 connections |
CPU | |
CPU utilization | Time during which the processor is in one of the following statuses: TU, TPR, SIH, IDLE or STOP |
Number of system calls | Number of SVC calls in TU/TPR per second, and the sum of all SVC calls per second |
Databases | |
Utilization in the SESAM/SQL database system | Number of transactions; number of SQL plan generations, number of read/write accesses to buffers |
Utilization in the UDS/SQL database system | Number of CODASYL and SQL statements; number of transactions; number of read/write accesses; number of wait states |
Files | |
Catalog access statistics | Number of read/write accesses to catalog entries/JV entries of files per second, as well as average access times in milliseconds |
File access statistics | Number of PAM-WAIT, PAM-CHECK, PAM-READ, PAM-WRITE operations and input/output operations per second for one file |
File access times | Average access time in milliseconds for each input/output |
| File access statistics for selected disks | Information on the input/output operations on all files |
IOs | |
Number of I/O operations and transmission rates | Number of DMS and paging input/output operations per second and transmission rates in KB per second |
| Number of paging I/O operations | Number of 4 kB pages read/written per second |
| IO priorities for disks and channels | Data of IOPT function (IORM utility) |
Channel transmission rates | Number of I/Os and transferred PAM blocks per channel |
Length of device queues and parallel processed I/Os | Number of tasks waiting for the execution of I/Os before the device and parallel processed I/Os |
Hardware and software service times for disks | Service times are measured in microseconds |
| Detailed service times for devices | Detailed service times (DCS) in milliseconds |
Memory/disk storage | |
Allocation of main memory | Number of 4-KB pages in main memory |
Allocation of paging area | Number of pageable 4-KB pages on the devices |
Allocation of virtual address space | Number of class 1 through class 4 pages in the virtual address space |
Page fault rate | Number of page fault interrupts per second |
Utilization of pubsets | Capacity and utilization of SF pubsets and volume sets |
Subsystem | |
Data to PCS | Service rate of the affected categories in %, job delays and Service units per second |
UTM response times and transaction rates | Number of dialog and asynchronous transactions per second and the average time in seconds taken for the transaction |
Number and duration of send jobs via MSCF | Number of send jobs per second, as well as average total and wait times |
Data to POSIX | File accesses, message accesses, semaphore activities, buffer utilization and all types of system accesses per second |
Lock requests to the DLM | Number of enqueue, convert, dequeue and information lock requests per second, as well as the number of lock allocations and releases per second |
Data to NSM | Data on synchronization functions in HIPLEX |
Data to HSMS | Data on the migration of files to the background level and the retrieval of files to the processing level |
Data to openFT | Load values of selected openFT instances |
Task | |
Number of tasks | Number of BATCH, DIALOG, TP and system tasks |
Length of task queues | Length of task queues per category |
| Dwell times in task queues | Dwell times in task queues per category |
Task activation and deactivation | Frequency of task activation and deactivation |
Task-specific resource utilization | Service units per second, percentage CPU utilization, input/output operations per second, used pages in 4-KB pages, paging read per second |
Allocation and queues of task locks | Percentage utilization of a task lock and the number of tasks in the task lock queue |
VM2000 | |
Hypervisor activities (/390 servers) | Percentage active and idle times of the server. |
Guest system activities | Planned and measured CPU utilization as a percentage |
CPU pools | Utilization of the CPU pools |
VM groups (/390 servers) | Utilization of VM groups |