Storage Analysis situations

The predefined situations in this category monitor storage analysis.

Note: All the attribute names in this group are prefixed with CICSplex_Storage_Analysis. except where stated.

CICSplex_DSAHigh_Warning

Warning threshold exceeded for high DSA usage.

Consider increasing the size of the CICS® region and make the DSA larger. Increase the region size only, if the Region Overview workspace 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 Percent_Used is greater than 70 and the value of Percent_Used is less than or equal to 90 and the value of Area equals DSA then situation CICSplex_DSAHigh_Warning is true.

CICSplex_DSAHigh_Critical

Critical threshold exceeded for high DSA usage.

Consider increasing the size of the CICS region and make the DSA larger. Increase the region size only, if the Region Overview workspace 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 Percent_Used is greater than 90 and the value of Area equals DSA then situation CICSplex_DSAHigh_Critical is true.

CICSplex_DSALow_Warning

Warning threshold exceeded for low DSA usage.

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 Percent_Used is less than 35 and the value of Percent_Used is greater than or equalto 15 and the value of Area equals DSA then situation CICSplex_DSALow_Warning is true.

CICSplex_DSALow_Critical

Critical threshold exceeded for low DSA usage.

Formula: If the value of Percent_Used is less than 15 and the value of Area equals DSA then situation CICSplex_DSALow_Critical is true.

CICSplex_DSAAvail_Warning

Warning threshold exceeded for low DSA availability.

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 Storage_Available is less than 768 and the value of Storage_Available is greater than or equal to 256 and the value of Area equals DSA then situation CICSplex_DSAAvail_Warning is true.

CICSplex_DSAAvail_Critical

Critical threshold exceeded for low DSA availability.

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 Storage_Available is less than 256 and the value of Area equals DSA then situation CICSplex_DSAAvail_Critical is true.

CICSplex_EDSAHigh_Warning

Warning threshold exceeded for high EDSA usage.

Increase EDSALIM in the CICS System Initialization Table. The Storage Analysis workspace provides an overview of storage availability with in each constituent EDSA. For task and CICS component storage usage, consult the storage displays offered by OMEGAMON AI for CICS.

Formula: If the value of Percent_Used is greater than 70 and the value of Percent_Used is less than or equal to 90 and the value of Area equals EDSA then situation CICSplex_EDSAHigh_Warning is true.

CICSplex_EDSAHigh_Critical

Critical threshold exceeded for high EDSA usage.

Formula: If the value of Percent_Used is greater than 90 and the value of Area equals EDSA then situation CICSplex_EDSAHigh_Critical is true.

CICSplex_EDSALow_Warning

Warning threshold exceeded for low EDSA usage.

If this situation trips consistently, it indicates an excessive EDSA size. Decrease EDSALIM in the SIT. For current task storage, use the storage display functions found in OMEGAMON AI for CICS. If there are very few tasks, as shown in the Transaction Analysis workspace, there might be little EDSA in use.

Formula: If the value of Percent_Used is less than 35 and the value of Percent_Used is greater than or equal to 15 and the value of Area equals EDSA then situation CICSplex_EDSALow_Warning is true.

CICSplex_EDSALow_Critical

Critical threshold exceeded for low EDSA usage.

Formula: If the value of Percent_Used is less than 15 and the value of Area equals EDSA then situation CICSplex_EDSALow_Critical is true.

CICSplex_DSASOS_Warning

Warning threshold exceeded for DSA short-on-storage.

Use the storage views 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 workspace and look at the Wait Type column; consider using the CICS CEMT transaction or the KILL option of OMEGAMON AI for CICS to purge the offending task.

Formula: If the value of SOS equals Yes and the value of Area equals DSA then situation CICSplex_DSASOS_Warning is true.

CICSplex_DSASOS_Critical

Critical threshold exceeded for DSA short-on-storage.

Use the storage views 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 workspace and look at the Wait Type field; consider using the CICS CEMT transaction or the KILL option of OMEGAMON AI for CICS to purge the offending task.

Formula: If the value of SOS equals Yes and the value of Area equals DSA then situation CICSplex_DSASOS_Critical is true.

CICSplex_EDSASOS_Warning

Warning threshold exceeded for EDSA short-on-storage.

Use the storage views 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 workspace and look at the Wait Type field; consider using the CICS CEMT transaction or the KILL option of OMEGAMON AI for CICS to purge the offending task.

Formula: If the value of SOS equals Yes and the value of Area equals EDSA then situation CICSplex_EDSASOS_Warning is true.

CICSplex_EDSASOS_Critical

Critical threshold exceeded for EDSA short-on-storage.

Use the storage views 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 workspace and look at the Wait Type column. Consider using the CICS CEMT transaction or the KILL option of OMEGAMON AI for CICS to purge the offending task.

Formula: If the value of SOS equals Yes and the value of Area equals EDSA then situation CICSplex_EDSASOS_Critical is true.

CICSplex_EDSAAvail_Warning

Warning threshold exceeded for low EDSA availability.

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 Storage_Available is less than 3072 and the value of Storage_Available is greater than or equal to 1024 and the value of Area equals EDSA then situation CICSplex_EDSAAvail_Warning is true.

CICSplex_EDSAAvail_Critical

Critical threshold exceeded for low EDSA availability.

Formula: If the value of Storage_Available is less than 1024 and the value of Area equals EDSA then situation CICSplex_EDSAAvail_Critical is true.