KM5 Spin Lock attributes

These attributes collect spin lock data retrieved from Resource Measurement Facility (RMF). For data to be available for these attributes, IBM® Z OMEGAMON AI for z/OS must be configured to use RMF lock data and RMF must be configured to collect lock data. For other dependencies, see the prerequisites section of Attributes topic.

ASID The unique system-assigned identifier for the address space in which the job is running. This value is displayed only when Mode is blank.

Held Percent The percentage of samples where the address space has been found holding the lock. Values are reported to two decimal places of precision.

Job Name The name of the address space spinning due to lock request. This value is displayed only when Mode is blank.

Managed System The name of the managed system from which this data is collected. The name has the format: <plexname>:<smfid>:MVSSYS, where <plexname> is the sysplex this LPAR resides in, and <smfid> is the system's SMF identifier.

Mode Indicates whether the lock is held exclusively or shared. Possible values are: Exclusive, Shared, Warning. Warning mode is used only when RMF Status is an exception state (2 or 3).

Requesting Address The instruction address where the lock was requested. This value is displayed only when Mode is blank.

Resource Name The resource name of the spin lock.

RMF Status Indicates the availability of Resource Measurement Facility (RMF) and lock data. The valid values are:

Sample Period Sample period, in seconds.

Spin Percent The percentage of samples, to two decimal places, where the address space has been found spinning due to a lock request. This value is displayed only when Mode is blank.