CDM Disk Metrics not showing correct value in USM

The disk usage percentage metric value on device Details tab in USM showing incorrect value.



The other reporting interface such as Performance Report shows correct value for the data.

The problem indicates that data in S_QOS_SNAPSHOT table remain outdated or not updated correctly.

(*) S_QOS_SNAPSHOT holds the latest QOS data and USM reads the table to display disk usage percentage metric on the device Details tab.
(*) data_engine probe is responsible to update S_QOS_SNAPSHOT table.

 

Please confirm current value of "hub_bulk_size" in the <setup> section of data_engine.cfg

If "hub_bulk_size" value is higher value than the total number of rows in S_QOS_DATA table,
please reduce "hub_bulk_size" value.


This is a known issue described in the below doc. Please take a look at this.

https://docops.ca.com/ca-unified-infrastructure-management-probes/ga/en/alphabetical-probe-articles/data_engine/data_engine-best-practices#data_engineBestPractices-HubBulkSize

Note: 
Whenever the hub_bulk_size parameter is set to a value larger than the total QoS objects in the S_QOS_DATA table,
S_QOS_SNAPSHOT will not update.
To correct this issue, set the hub_bulk_size to a value less than the total number of rows in the S_QOS_DATA table.