CDM Disk Metrics not showing correct value in USM

Products

• DX Infrastructure Management
• NIMSOFT PROBES

Issue/Introduction

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

<Please see attached file for image>

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

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The problem indicates that data in S_QOS_SNAPSHOT table remain outdated or not updated correctly.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

 

Environment

UIM any version

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://techdocs.broadcom.com/content/broadcom/techdocs/us/en/ca-enterprise-software/it-operations-management/ca-unified-infrastructure-management-probes/GA/alphabetical-probe-articles/data-engine/data-engine-best-practices.html#concept.dita_c5b4cc5d37ef1b50297ad9e27a73ad5e4a45dd46_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.