By means of the PFA monitoring program, SM2 records monitored data on the use of caches under User PFA.
The PFA CACHE report provides an overview of the use of all PFA cache areas of the product DAB. The data of the PFA CACHE report is also output in the DAB report.
Main memory (MM) is used as a cache medium.
Report output
The REPORT PFA statement is used to request the output of the PFA CACHE report. The report can only be output if the SM2 administrator has activated the monitoring process using the statement START-MEASUREMENT-PROGRAM TYPE=*PFA.
Overflow screens may be requested for this report.
The monitored data output is sorted under the categories READ and WRITE.
HOST0001 SM2 PFA CACHE CYCLE: 60 S <date> <time> | CACHE |CACHE| BLK | SIZE | READ | RD HIT| WRITE | WR HIT|OVERRUNS| | ID | MED | SIZE| | (1/S) | (%) | (1/S) | (%) | (1/S) | +--------+-----+-----+----------+--------+-------+--------+-------+--------+ | 1OSY | MM | 2 K | 10 MB | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | | 1OSZ | MM | 2 K | 10 MB | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | | 2OSQ | MM | 2 K | 20 MB | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | +--------+-----+-----+----------+--------+-------+--------+-------+--------+
Monitoring information
CACHE ID | Cache ID. This is identical to the catalog ID of the pubset served. |
CACHE MED | Cache medium (MM: main memory) |
BLK SIZE | Block size of the cache |
SIZE | Size of the cache |
READ (1/S) | Number of read operations to hiperfiles per second |
RD HIT (%) | Percentage of hits in the total number of read operations to hiperfiles |
WRITE (1/S) | Number of write operations to hiperfiles per second |
WR HIT (%) | Percentage of fast write operations in the total number of write operations to hiperfiles |
OVERRUNS (1/S) | Number of unsuccessful attempts to use the cache due to overload per second |