This documentation supports the 18.08 version of BMC Atrium Core.

To view the latest version, select the version from the Product version menu.

CMDB Engine configuration settings

The parameters in the CMDB Engine section allow you to :

  • Configure cache settings in a server group environment
  • Configure orphan data settings
  • Configure data handling parameters
  • Configure inline normalization
  • Subscribe to an event

If you are in a server group environment, select the required AR server from the Select Server drop-down list. If you have a stand-alone environment, the required server name is automatically displayed.

FunctionParameterDescriptionDefault ValueSetting in the AR Configuration file
(ar.cfg or ar.conf)
Configure cache settings

Cache Refresh Interval 

Defines the interval after which CMDB to refreshes its cache in the background. Changes you make to this parameter takes effect at the next refresh interval or engine task kill. 

Notes:

  • Set the value of this parameter to be greater than 60000 milliseconds (60 seconds). Else, the default value is taken.
  • To disable this parameter, set the value to minus one (-1). 
300000 millisecondsCMDB-Cache-Refresh-Interval
Initial Delay for Cache Refresh

Defines the time after which the cache is refreshed after the server is started.

Note: Set the value of this parameter to be greater than 60000 milliseconds (60 seconds). Else, the default value is taken.

900000 millisecondsCMDB-Cache-Refresh-Initial-Delay
Configure orphan data settings
ChunkedItem Cleanup Interval

Defines the interval at which the CMDB server performs orphan data checks. Changes you make to this parameter take effect at the next refresh interval or CMDB Engine task kill. 

Notes:

  • Set the value of this parameter to be greater than 60000 milliseconds (60 seconds). Else, the default value is taken.
  • To disable this parameter, set the value as minus one (-1). 
300000 millisecondsCMDB-ChunkedItem-Cleanup-Interval
Initial Delay for Chunked Item Cleanup

Defines the delay to start checking for orphan data after CMDB server has started. 

Note: Set the value of this parameter to be greater than 60000 milliseconds (60 seconds). Else, the default value is taken.

900000 millisecondsCMDB-ChunkedItem-Cleanup-Initial-Delay
Duration for Chunked Item in Cache

Defines the interval after which the data is treated as orphaned and the memory is reclaimed by the AR server. 

Note: Set the value of this parameter to be greater than 60000 milliseconds (60 seconds). Else, the default value is taken.

3600000 millisecondsCMDB-ChunkedItem-Allowed-Period-In-Cache
Configure data handling parameters









Maximum Results Per Query

Defines the maximum number of results that are returned per query.

A value of 0 implies that the maximum results per query are unlimited.

Zero (0)CMDB-Max-Results-Per-Query
Graph Walk Chunk Size

Defines the chunk size for the results returned by the graph walk API.

200CMDB-Graph-Walk-Chunk
GQ Recursion Limit

Defines the number of levels of recursion for the CMDB graph query.

Zero (0)CMDB-GQRecursion-Limit
Default Impact Weight

Defines the default weight attached to an impact relationship. This value is used to configure the Impact Simulator to set default Impact weight in relationships when the hasImpact attribute is set to Yes

Zero (0)CMDB-Impact-Weight-Default
Hard Delete Only if Marked for Delete

Specifies that, if a CI is to be hard deleted, it should be first marked for deletion.

Note: This setting does not apply to the CIs of classes from BMC.CORE.CONFIG namespace.

FalseCMDB-Hard-Delete-Only-If-Marked-For-Delete
Validate Federation Source

Validates if data is present in Federated data store. Has values True or False.

If set to True, the CMDB Engine performs the validation around federation data sources.

TrueCMDB-Validate-Federation-Source
Create Log Per Thread

Creates a separate log file for each thread of API/SQL/Filter Logs.

Zero (0)CMDB-Log-Per-Thread
Allow Global BSSO Delete

Checks the out-of-the-box global instances of the three classes, BMC_BusinessService, BMC_ServiceOffering, and BMC_SERVICEREALIZEDBYOFFERING for deletion.

FalseCMDB-Allow-Global-BSSO-Delete
Configure inline normalizationEnable Inline Normalization

If Inline normalization is enabled, the CIs are normalized as soon as it is created or modified in the CMDB. In this mode, CIs are normalized before it is saved in the CMDB.

This check box is selected by default so that the CIs are normalized as soon as it is created, updated, or modified.

Important

The normalization mode should be selected as Inline always, unless while normalizing large amounts of data, when the batch mode should be used. Use the batch mode and schedule it to run outside of peak hours to minimize the impact on users. 

TrueCMDB-Inline-Normalization
Subscribe to an event
Enable Event ChannelEnables the subscriber to receive the event as soon as a CI is created, updated, or modified.FalseEvent-Channel-Enabled




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