Storage manager: Global statistics

You can retrieve storage manager global statistics by using the EXEC CICS EXTRACT STATISTICS STORAGE system command. They are mapped by the DFHSMSDS DSECT.

These statistics are collected for each dynamic storage area (DSA). .

Table 1. Storage manager: Global statistics
DFHSTUP name	Field name	Description
Storage protection	SMSSTGPROT	Whether storage protection is active: X'01' active X'00' not active Reset characteristic: Not reset
Transaction isolation	SMSTRANISO	Whether transaction isolation is active: X'01' active X'00' not active Reset characteristic: Not reset
Reentrant programs	SMSRENTPGM	Whether write protection for reentrant programs is enabled: X'01' PROTECT - RDSA and ERDSA are obtained from key 0 storage. X'00' NOPROTECT - RDSA and ERDSA are obtained from key 8 storage. Reset characteristic: Not reset
Current DSA limit	SMSDSALIMIT	The current limit of the CICS® dynamic storage areas, as defined by the DSALIM system initialization parameter. Reset characteristic: Not reset
Current DSA total	SMSDSATOTAL	The total amount of storage currently allocated to the DSAs below 16 MB (below the line). This value might be smaller or larger than Current DSA limit. Reset characteristic: Not reset
Peak DSA total	SMSHWMDSATOTAL	The peak amount of storage allocated to the DSAs below 16 MB (below the line). This value might be smaller or larger than Current DSA limit. Reset characteristic: Reset to current value
Current EDSA limit	SMSEDSALIMIT	The current limit of the CICS extended dynamic storage areas, as defined by the EDSALIM system initialization parameter. Reset characteristic: Not reset
Current EDSA total	SMSEDSATOTAL	The total amount of storage currently allocated to the DSAs above 16 MB but below 2 GB (above the line). This value might be smaller or larger than Current EDSA limit. Reset characteristic: Not reset
Peak EDSA total	SMSHWMESDATOTAL	The peak amount of storage allocated to the DSAs above 16 MB but below 2 GB (above the line). This value might be smaller or larger than Current EDSA limit. Reset characteristic: Reset to current value
MEMLIMIT size	SMSMEMLIMIT	The value of the z/OS MEMLIMIT parameter, which limits the amount of 64-bit storage for the CICS region. This value can be in megabytes, gigabytes, terabytes, petabytes, or exabytes, depending on size. A value of `NOLIMIT` indicates that no upper limit is imposed. Reset characteristic: Not reset
MEMLIMIT set by	SMSMEMLIMITSRC	The source of the MEMLIMIT value: SMFPRM indicates that MEMLIMIT is set by SYS1.PARMLIB(SMFPRMxx). JCL indicates that MEMLIMIT is set by JCL. REGION indicates that MEMLIMIT is set to NOLIMIT because REGION=0M is specified in JCL. IEFUSI indicates that MEMLIMIT is set by the z/OS installation exit IEFUSI. Reset characteristic: Not reset
GETSTOR request size	SMSGETSTORSIZE	The GETSTOR request size. Reset characteristic: Not reset
Current Address Space active	SMSASACTIVE	The current address space available above the bar. Reset characteristic: Not reset
Peak Address Space active	SMSHWMASACTIVE	The peak amount of address space available above the bar. Reset characteristic: Reset to current value
Current GDSA active	SMSGDSAACTIVE	The current storage in use above the bar. Reset characteristic: Not reset
Peak GDSA active	SMSHWMGDSAACTIVE	The peak amount of storage in use above the bar. Reset characteristic: Reset to current value
MVS™ storage request waits	SMSMVSSTGREQWAITS	The total number of MVS storage requests that have waited for MVS storage above 16 MB. Reset characteristic: Reset to zero
Total time waiting for MVS storage	SMSTIMEWAITMVS	The total time that MVS storage requests have spent waiting for MVS storage above 16 MB. Reset characteristic: Reset to zero
Bytes Allocated to Private Memory Objects	SMSLVABYTES	The number of bytes allocated from large virtual memory in private memory objects. ¹ Reset characteristic: Not reset
Bytes Hidden within Private Memory Objects	SMSLVHBYTES	The number of bytes hidden in large virtual memory private memory objects. ¹ Reset characteristic: Not reset
Peak Bytes Usable within Private Memory Objects	SMSLVGBYTES	The high-water mark of usable bytes in large virtual memory private memory objects. ¹ Reset characteristic: Not reset
Number of Private Memory Objects	SMSLVNMEMOBJ	The number of private memory objects allocated. ¹ Reset characteristic: Not reset
Auxiliary Slots backing Private Memory Objects	SMSHVAUXSLOTS	The number of auxiliary storage slots that are used to back 64-bit private memory objects. ¹ Reset characteristic: Not reset
HWM Auxiliary Slots backing Private Memory Objects	SMSHVGAUXSLOTS	The high-water mark of auxiliary storage slots that are used to back 64-bit private memory objects. ¹ Reset characteristic: Not reset
Real Frames backing Private Memory Objects	SMSHVPAGESINREAL	The number of real storage frames that are used to back 64-bit private memory objects. ¹ Reset characteristic: Not reset
HWM Real Frames backing Private Memory Objects	SMSHVGPAGESINREAL	The high-water mark for the number of real storage frames that are used to back 64-bit private memory objects. ¹ Reset characteristic: Not reset
Number of Large Memory Objects Allocated	SMSLARGEMEMOBJ	The number of large memory objects allocated by this address space. ¹ Reset characteristic: Not reset
Number of Large Pages backed in Real Storage	SMSLARGEPAGESINREAL	The number of large pages (1 MB pages) backed in real storage owned by this address space. ¹ Reset characteristic: Not reset
Shared Bytes from Large Memory Objects	SMSLVSHRBYTES	The number of shared bytes allocated from high virtual memory. ¹ Reset characteristic: Not reset
Peak Shared Bytes within Large Memory Objects	SMSLVSHRGBYTES	The high-water mark for the number of shared bytes in large virtual memory objects. ¹ Reset characteristic: Not reset
Number of Shared Memory Objects	SMSLVSHRNMEMOBJ	The number of shared memory objects allocated.¹ Reset characteristic: Not reset
Number of FROMGUARD Failures	SMSFROMGUARDFAIL	The number of times that a request for 64-bit storage has failed, where the request uses the z/OS IARV64 macro with the REQUEST=CHANGEGUARD, CONVERT=FROMGUARD parameters. ¹ Reset characteristic: Reset to zero
FROMGUARD Failure size	SMSFROMGUARDFAILSIZE	The size of the largest request for 64-bit storage that has failed, in bytes, where the request uses the z/OS IARV64 macro with the REQUEST=CHANGEGUARD, CONVERT=FROMGUARD parameters. ¹ Reset characteristic: Reset to zero
Current GDSA allocated	SMSGDSAALLOC	The total amount of storage currently allocated to the DSAs above the bar. Reset characteristic: Not reset
Peak GDSA allocated	SMSHWMGDSAALLOC	The peak amount of storage allocated to the DSAs above the bar. Reset characteristic: Reset to current value

Note:

For more information about the memory that this statistic refers to, see Using the 64-bit Address Space in the z/OS MVS Programming: Extended Addressability Guide.