The Address Space Virtual Storage Attribute Group provides information about the virtual storage allocated to an address space. The attributes report on low, extended, and large storage. Low storage is that below the 16 Megabyte (MB) line. Extended storage is in the range from 16 MB to 2 Gigabytes (GB). Above 2 GB, storage is referred to as large storage, or “above the bar”. For each category, both fixed and virtual storage are reported on.
ASID The address space identifier as it is known to z/OS in hexadecimal.
Address Space Name The name of the job, TSO user, started task, or APPC address space reported on in the row. Valid value is an alphanumeric string, with a maximum of 8 characters.
Extended Fixed The amount of fixed storage (in megabytes) between 16 MB and 2 GB. Valid value is a 4-byte integer.
Extended Virtual The allocated virtual storage (in megabytes) between 16 MB and 2 GB. Valid value is a 4-byte integer.
Large Fixed The amount of fixed storage above the 2 GB (or above the bar) address range. Storage above the 2 GB boundary is often referred to as storage above the bar. Valid value is a 4-byte integer.
Large Inuse Percent The percent of storage in use above the bar, relative to the maximum allowed. Valid value is a 2-byte integer in the range 0.0 - 100.0.
Large Max The maximum amount of storage above the bar (2 GB boundary) that could be allocated by the address space. Valid value is a 4-byte integer.
Here are the suffixes and names for values in 64-bit:
Large Virtual The amount of allocated virtual storage above 2 GB (above the bar). Valid value is a 4-byte integer.
Low Fixed The storage below the 16 MB line, which is fixed in Megabytes. Valid value is a 4-byte integer.
Low Virtual The amount of allocated virtual storage, in Megabytes, below the 16 MB line, for this address space. Valid value is a 4-byte integer.
Managed System A z/OS operating system in your enterprise that is being monitored by a Tivoli OMEGAMON XE on z/OS agent. Valid value is a character string with a maximum length of 32 bytes in the format <plexname>:<smfid>:MVSSYS.
Management Status The management status of the address space. Valid values are:
Monitored | The Working Set Manager has noticed that the address space is using an excessive amount of CPU for paging and is actively keeping track of its central storage use and paging rates. Monitored address spaces are associated with a central storage target value of 0. An address space can be swapped out and still be monitored by the Working Set Manager. |
Managed | The Working Set Manager has determined that the paging rate of the monitored address space continues to be excessive and some type of action must be taken. |
Isolated | The address space is storage isolated. An address space in this state is exempt from Working Set Manager action. |
NonSwap | The address space is non-swappable. An address space in this state is beyond Working Set Manager control. |
OK | The address space is non-swappable. An address space in this state is beyond Working Set Manager control. |
Unknown | This is a “should not happen” value. If the agent can't determine a value, it defaults to unknown. |
Step Name The address space stepname currently executing. Valid value is an alphanumeric string, with a maximum of 8 characters.
Swap Status The swap status of the address space. Valid values are:
IN | The address space is swapped in and occupies central storage. |
OUT | The address space is swapped out and does not occupy central storage. |
IN NSW | The address space is in central storage and is non-swappable. |
OUT LSW | The address space is logically swapped and occupies central storage. |
UNKNOWN | Swap status is unknown. |
Total Fixed The total amount of fixed storage, in megabytes, for the address space. Valid value is a 4-byte integer.
Total Virtual The total amount of allocated virtual storage, in megabytes, for the address space. Valid value is a 4-byte integer.