MAES can capture running subtask statistics at fixed time intervals. The time interval is specified with the STATINT MAES runtime parameter.
Statistics gathering begins when the following requirements are met:
The data set described by MAESSTAT is typically on disk. MAES automatically applies the data set characteristics (DCB attributes). For example, you might specify the MAESSTAT DD statement as follows:
//MAESSTAT DD DSN=SYS2.AION.MAES.STATS,DISP=(NEW,CATLG), // UNIT=SYSDA,SPACE=(CYL,(5,1)), DCB(RECFM=FB,LRECL=64,BLKSIZE=3072)
The information gathered includes the amount of virtual memory used by each consultation, and how much of that usage is divided between the program and data processing tasks. This information can be useful for tuning your applications as well as determining the appropriate region size for the MAES address space.
When MAES is started, it initializes a separate task within the address space that sets a timer based on the value of STATINT. When the timer expires, the statistics task writes a record to the MAESSTAT data set reflecting information about the MAES task, and one additional record for each active consultation. The resulting data set can be processed by the AIONSTAT program or by your own program if you wish to produce a customized report or histogram.
Note: A copy of the JCL that executes the AIONSTAT program is provided in the <aionhlq>.MAES.JCL as member STATREP.
A Statistics Report is shown in the following figure:
AION Multitasking Statistics Report Page: 1
Mon Feb 15 14:27:24 2001 99/043 14:29:03:72 AC :0000,SU :0000,ID : 0013, Frames : 2307, VTAM not posted 99/043 14:29:03:72 **MAES** CSA LSQA SQA DATA SYSTEM <16M 2416K 36K 1148K 124K 376K >16M 103904K 8228K 19796K 2816K 4960K 99/043 14:29:33:77 AC :0000,SU :0000,ID : 0013, Frames : 2308, VTAM not posted 99/043 14:29:33:77 **MAES** CSA LSQA SQA DATA SYSTEM <16M 2416K 36K 1148K 124K 376K >16M 104040K 8228K 19848K 2816K 4960K 99/043 14:30:06:61 AC :0000,SU :0000,ID : 0013, Frames : 2301, VTAM not posted 99/043 14:30:06:61 **MAES** CSA LSQA SQA DATA SYSTEM <16M 2424K 36K 1152K 124K 376K >16M 104048K 8228K 20496K 2816K 4960K 99/043 14:30:36:67 AC :0000,SU :0000,ID : 0013, Frames : 2301, VTAM not posted 99/043 14:30:36:67 **MAES** CSA LSQA SQA DATA SYSTEM <16M 2424K 36K 1148K 124K 376K >16M 103948K 8228K 20284K 2816K 4960K 99/043 14:31:06:71 AC :0000,SU :0000, ID : 0013, Frames : 2301, VTAM not posted 99/043 14:31:06:71 **MAES** CSA LSQA SQA DATA SYSTEM <16M 2416K 36K 1148K 124K 376K >16M 103360K 8228K 20712K 2816K 4960K 99/043 14:31:36:78 AC :0000,SU :0000,ID : 0013, Frames : 2301, VTAM not posted 99/043 14:31:36:78 **MAES** CSA LSQA SQA DATA SYSTEM <16M 2416K 36K 1148K 124K 376K >16M 103392K 8228K 21132K 2816K 4960K 99/043 14:38:07:37 MONITOR A001 CSA LSQA SQA DATA SYSTEM <16M 2416K 36K 1144K 96K 12K >16M 103340K 8352K 22336K 376K 16K
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