The predefined situations in this category monitor storage analysis. The description and formula for this situation follow.
Consider increasing the size of the CICS region and make the DSA larger. Increase the region size only if the Region Overview report shows adequate LSQA to support the change. It is also worth checking the current OSCOR usage. If the DSA size cannot be increased, consider reducing the CICS MAXTASK value.
Formula
If the value of the attribute Percent_Used is greater than 70 and the value of the attribute Percent_Used is less than or equal to 90 and the value of the attribute Area equals DSA
Consider increasing the size of the CICS region and make the DSA larger. Increase the region size only if the Region Overview report shows adequate LSQA to support the change. It is also worth checking the current OSCOR usage. If the DSA size cannot be increased, consider reducing the CICS MAXTASK (MXT) value.
Formula
If the value of the attribute Percent_Used is greater than 90 and the value of the attribute Area equals DSA
If this situation fires consistently, it can indicate an excessive DSA size. Decrease the size of the DSA for the CICS region. If there are very few tasks, there might be very little DSA in use. Consider increasing the maximum number of tasks (MXT CICS can process at one time.
Formula
If the value of the attribute Percent_Used is less than 35 and the value of the attribute Percent_Used is greater than or equal to 15 and the value of the attribute Area equals DSA
If this situation fires consistently, it can indicate an excessive DSA size. Decrease the size of the DSA for the CICS region. If there are very few tasks, there might be very little DSA in use. Consider increasing the maximum number of tasks (MXT CICS can process at one time.
Formula
If the value of the attribute Percent_Used is less than 15 and the value of the attribute Area equals DSA
Ensure that the predicates in this situation are set to trip only when available storage before SOS is critically small. DSA extents are al located in units of 256KB. The exception to this is the user DSA which is 1MB when storage isolation is active. Change the DSALIM parameter for the CICS address space to increase the storage available to CICS.
Formula
If the value of the attribute Storage_Available is less than 768 and the value of the attribute Storage_Available is greater than or equal to 256 and the value of the attribute Area equals DSA
Ensure that the predicates in this situation are set to trip only when available storage before SOS is critically small. DSA extents are allocated in units of 256 kilobytes. The exception to this is the user DSA, which is 1 megabyte when storage isolation is active. Change the DSALIM parameter for the CICS address space to increase the storage available to CICS.
Formula
If the value of the attribute Storage_Available is less than 256 and the value of the attribute Area equals DSA
Increase EDSALIM in the CICS System Initialization Table. The Storage Analysis report will provide an overview of storage availability with in each constituent EDSA. For task and CICS component storage usage, consult the storage displays offered by OMEGAMON XE for CICS.
Formula
If the value of the attribute Percent_Used is greater than 70 and the value of the attribute Percent_Used is less than or equal to 90 and the value of the attribute Area equals EDSA
Increase EDSALIM in the CICS System Initialization Table. The Storage Analysis report will provide an overview of storage availability with in each constituent EDSA. For task and CICS component storage usage, consult the storage displays offered by OMEGAMON XE for CICS.
Formula
If the value of the attribute Percent_Used is greater than 90 and the value of the attribute Area equals EDSA
If this situation trips consistently, it can indicate an excessive EDSA size. Decrease EDSALIM in the SIT. For current task storage, use the storage display functions found in Tivoli OMEGAMON XE for CICS on z/OS. If there are very few tasks, as shown in the Transaction Analysis report, there might be little EDSA in use.
Formula
If the value of the attribute Percent_Used is less than 35 and the value of the attribute Percent_Used is greater than or equal to 15 and the value of the attribute Area equals EDSA
If this situation trips consistently, it can indicate an excessive EDSA size. Decrease EDSALIM in the SIT. For current task storage, use t he storage display functions found in Tivoli OMEGAMON XE for CICS on z/OS. If there are very few tasks, as shown in the Transaction Analysis report, there might be little EDSA in use.
Formula
If the value of the attribute Percent_Used is less than 15 and the value of the attribute Area equals EDSA
Use the storage displays of Tivoli OMEGAMON XE for CICS on z/OS to locate tasks that are u sing a large amount of DSA. Verify that their storage requests are for a reasonable amount of memory. To determine if a given task is hung in a storage control request, go to the Transaction Analysis report and look at the Wait Type field. Consider using the CICS CEMT transaction or the KILL option of Tivoli OMEGAMON XE for CICS on z/OS to purge the offending task.
Formula
If the value of the attribute SOS equals Yes and the value of the attribute Area equals DSA
Use the storage displays of Tivoli OMEGAMON XE for CICS on z/OS to locate tasks that are u sing a large amount of DSA. Verify that their storage requests are for a reasonable amount of memory. To determine if a given task is hung in a storage control request, go to the Transaction Analysis report and look at the Wait Type field. Consider using the CICS CEMT transaction or the KILL option of Tivoli OMEGAMON XE for CICS on z/OS to purge the offending task.
Formula
If the value of the attribute SOS equals Yes and the value of the attribute Area equals DSA
Use the storage displays of Tivoli OMEGAMON XE for CICS on z/OS to locate tasks that are using a large amount of DSA. Verify that their storage requests are for a reasonable amount of memory. To determine if a given task is hung in a storage control request, go to the Transaction Analysis report and look at the Wait Type field. Consider using the CICS CEMT transaction or the KILL option of Tivoli OMEGAMON XE for CICS on z/OS to purge the offending task.
Formula
If the value of the attribute SOS equals Yes and the value of the attribute Area equals EDSA
Use the storage displays of Tivoli OMEGAMON XE for CICS on z/OS to locate tasks that are u sing a large amount of DSA. Verify that their storage requests are for a reasonable amount of memory. To determine if a given task is hung in a storage control request, go to the Transaction Analysis report and look at the Wait Type field. Consider using the CICS CEMT transaction or the KILL option of Tivoli OMEGAMON XE for CICS on z/OS to purge the offending task.
Formula
If the value of the attribute SOS equals Yes and the value of the attribute Area equals EDSA
Ensure that the predicates in this situation are set to trip only when available storage before SOS is critically small. EDSA extents are allocated in units of 1MB. Change the EDSALIM parameter for the CICS address space to increase the storage available to CICS.
Formula
If the value of the attribute Storage_Available is less than 3072 and the value of the attribute Storage_Available is greater than or equal to 1024 and the value of the attribute Area equals EDSA
Ensure that the predicates in this situation are set to trip only when available storage before SOS is critically small. EDSA extents are allocated in units of 1MB. Change the EDSALIM parameter for the CICS address space to increase the storage available to CICS.
Formula
If the value of the attribute Storage_Available is less than 1024 and the value of the attribute Area equals EDSA
See also the CICSplex Storage Analysis attribute group.