EM 12c: Enterprise Manager 12c Cloud Control RAC Target Tablespace Metric Collection Error: ORA-12850: Could not allocate slaves on all specified instances (Doc ID 1680642.1)

Last updated on MARCH 24, 2016

Applies to:

Enterprise Manager for Oracle Database - Version 12.1.0.1.0 and later
Information in this document applies to any platform.

Symptoms

The Enterprise Manager 12c Cloud Control agent is failing to collect the tbspAllocation metric with the following error :

ORA-12850: Could not allocate slaves on all specified instances: 2 needed, 1 allocated
 
$ emctl control agent runCollection BDOQBINF:rac_database tbspAllocation
Oracle Enterprise Manager Cloud Control 12c Release 3
Copyright (c) 1996, 2013 Oracle Corporation. All rights reserved.
---------------------------------------------------------------
EMD runCollection error:
tbspAllocation:tbspAllocation:ORA-12850: Could not allocate slaves on all specified instances: 2 needed, 1 allocated

 

12c RAC database targets show no rows returned when querying the MGMT$DB_TABLESPACES view. This view is used in a script to produce daily tablespace alert reports.

Originally the data is populated into mgmt$db_tablespaces via the agent's oracle_dbconfig and tbspAllocation metrics

 



Cause

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