CDM Disk Metrics not showing correct value in USM

Document ID : KB000005837
Last Modified Date : 20/07/2018
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Issue:

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

User-added image

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

Environment:
UIM any version
Cause:

The problem indicates that data in S_QOS_SNAPSHOT table remain outdated or not updated correctly.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

 

Resolution:

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.