Storage Resource Manager SRM metrics
The following metrics are available in the
MainView SRM
views. For information about using this table, see How-to-use-the-metric-tables.
Before you create alarms based on these metrics, review the best practices for alarms in Manage-application-exceptions.
Metric | Indicates | View name Field name Element name | Recommended view filter | Recommended field threshold (adjust for site-specific processing) |
|---|---|---|---|---|
Class B - Performance metrics | ||||
Indexed VTOC status | The status of the VTOC index as Enabled, Disabled, Error, OS-VTOC, or Excluded A VTOC index that is disabled, or otherwise broken, can delay access to data sets on the volume. | SPVOLPU Indx VTOC S13IVTOC | none | S13IVTOC 'I' OR 'N' |
Class C - Decision support metrics | ||||
Data sets extents | Data sets that have a high number of extents | DEXTNT Exts W21EXTS | none | For VSAM:W21EXTS > 116 For non-VSAM:W21EXTS > 11 |
Fragmentation index | Volumes that have a high fragmentation index and are due for a scheduled defragmentation | SPVOLFR Frag Index S13FRAGX | none | S13FRAGX > 450 |
Logical volume response time | Poor I/O response time at the volume level and possible application response time problems Use this metric only for supporting information; monitor the actual work, such as the transaction or job. Logical volume response time is the I/O response to a DASD device as reported by the I/O Supervisor (IOS). | VOLPRRT Resp Time M06RSPCA | M06VOL IN (vol1, vol2...) | M06RSPCA > 25 |
Physical platter response time | Poor I/O response time at the physical volume level and widespread problems with many logical volumes and the applications sharing those volumes Set response thresholds low to provide an early warning of developing problems. Physical response time is the average response of all I/O activity to a real DASD volume by all logical volumes mapped to that volume. MainView calculates physical response time as an average of all logical volumes. | PHYPRRTZ Resp Time M06RSPCA | none | M06RSPCA > 15 |
Storage group and user defined pools percent used or free space | Relative usage of available DASD space | SPPOOL %Full S03PERFC | none | S03PERFC > 80 |
VSAM data set with high used RBA or percent full | Fragmented VSAM files, possibly affecting performance and availability | DVSAM Percent Used W21PUSEC | none | W21PUSEC > 80 |
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