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.
Storage manager: Global statistics for DSA
These statistics are collected for each dynamic storage area (DSA).
DFHSTUP name | Field name | Description |
---|---|---|
Storage protection | SMSSTGPROT |
Whether storage protection is active:
Reset characteristic: Not reset |
Transaction isolation | SMSTRANISO |
Whether transaction isolation is active:
Reset characteristic: Not reset |
Reentrant programs | SMSRENTPGM |
Whether write protection for reentrant programs is enabled:
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:
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 | This field is not populated.
Reset characteristic: Reset to zero |
Total time waiting for MVS storage | SMSTIMEWAITMVS | This field is not populated.
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 |
- 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.
Storage manager: Global statistics for user region storage and extended user region storage
These statistics are collected for MVS user region storage and extended user region storage.
DFHSTUP name | Field name | Description |
---|---|---|
Last monitor sample time | SMSMVSMONSAMPLELASTTIMELOCAL | The local time the MVS monitor system task last sampled MVS storage Reset characteristic: Not reset |
NOT IN THE DFHSTUP REPORT | SMSMVSMONSAMPLELASTTIMEGMT | The GMT when the MVS monitor system task last sampled MVS storage Reset characteristic: Not reset |
User region storage statistics | ||
State | SMSMVS24STATE | User region state Valid values are as follows:
Reset characteristic: Not reset |
Current unallocated total | SMSMVS24TOTALUNALLOC | The current total amount of unallocated user region storage Reset characteristic: Not reset |
LWM unallocated total | SMSMVS24TOTALUNALLOCLWM | Low water mark (the lowest) of the total amount of unallocated user region storage that was
recorded Reset characteristic: Reset to current |
Current unallocated largest contiguous area | SMSMVS24LARGESTUNALLOC | The size of the current largest contiguous storage area available in unallocated user region
storage Reset characteristic: Not reset |
LWM unallocated largest contiguous area | SMSMVS24LARGESTUNALLOCLWM | Low water mark (the lowest) of the size of the largest contiguous storage area available in
unallocated user region storage Reset characteristic: Reset to current |
Last date and time SOS | SMSMVS24LASTSOSTIMELOCAL | The local time the last user region SOS condition was detected Reset characteristic: Reset to zero |
NOT IN THE DFHSTUP REPORT | SMSMVS24LASTSOSTIMEGMT | The GMT when the last user region SOS condition was detected Reset characteristic: Reset to zero |
Time tasks waited because SOS | SMSMVS24WAITTIME | The time tasks waited because of the SOS or constrained state in the user region
storage Reset characteristic: Reset to zero |
Current tasks waiting because SOS | SMSMVS24NUMWAITS | The current number of tasks that are waiting because of the SOS or constrained state in user
region storage Reset characteristic: Not reset |
Peak tasks waiting because SOS | SMSMVS24NUMWAITSHWM | The peak number of tasks that waited because of the SOS or constrained state in user region
storage Reset characteristic: Reset to current |
Total waits because SOS | SMSMVS24TOTALNUMWAITS | The total number of tasks that waited because of the SOS or constrained state in user region
storage Reset characteristic: Reset to zero |
Extended user region storage statistics | ||
State | SMSMVS31STATE | Extended user region state Valid values are as follows:
Reset characteristic: Not reset |
Current unallocated total | SMSMVS31TOTALUNALLOC | The current total amount of unallocated extended user region storage Reset characteristic: Not reset |
LWM unallocated total | SMSMVS31TOTALUNALLOCLWM | Low water mark (the lowest) of the total amount of unallocated extended user region storage
that was recorded Reset characteristic: Reset to current |
Current unallocated largest contiguous area | SMSMVS31LARGESTUNALLOC | The size of the current largest contiguous storage area available in unallocated extended
user region storage Reset characteristic: Not reset |
LWM unallocated largest contiguous area | SMSMVS31LARGESTUNALLOCLWM | Low water mark (the lowest) of the size of the largest contiguous storage area available in
unallocated extended user region storage Reset characteristic: Reset to current |
Last date and time SOS | SMSMVS31LASTSOSTIMELOCAL | The local time the last extended user region SOS condition was detected Reset characteristic: Reset to zero |
NOT IN THE DFHSTUP REPORT | SMSMVS31LASTSOSTIMEGMT | The GMT when the last extended user region SOS condition was detected Reset characteristic: Reset to zero |
Time tasks waited because SOS | SMSMVS31WAITTIME | The time tasks waited because of the SOS or constrained state in extended user region
storage Reset characteristic: Reset to zero |
Current tasks waiting because SOS | SMSMVS31NUMWAITS | The current number of tasks that are waiting because of the SOS or constrained state in
extended user region storage Reset characteristic: Not reset |
Peak tasks waiting because SOS | SMSMVS31NUMWAITSHWM | The peak number of tasks that waited because of the SOS or constrained state in extended user
region storage Reset characteristic: Reset to current |
Total waits because SOS | SMSMVS31TOTALNUMWAITS | The total number of tasks that waited because of the SOS or constrained state in extended
user region storage Reset characteristic: Reset to zero |