Metrics Alerted by the Database for Tablespaces which no Longer Exists or have been Dropped (Doc ID 740340.1)

Last updated on JUNE 29, 2017

Applies to:

Oracle Database - Enterprise Edition - Version 10.2.0.1 to 10.2.0.4 [Release 10.2]
Enterprise Manager Base Platform - Version 10.2.0.2 and later
Information in this document applies to any platform.

Symptoms

Enterprises Manger (EM) 10.2.0.x Grid Control monitors a 10.2.0.x database.

In the target database, one of the tablespaces has been dropped from the database. 
However, alerts for the 'Tablespace Space Used' metric for the dropped tablespace keep occurring in the console.
Also, Email notifications are sent for these alerts:

EM Alert: Warning: ABC - Tablespace [XYZ] is [96 percent full]

Using <Note 403264.1> to investigate this issue, the following can be seen in the target database :

-  The tablespace no longer exists in the database:

select tablespace_name from dba_tablespaces where tablespace_name = 'XYZ'; 

no rows selected

-  There is an outstanding alert for the tablespace :

SQL> select object_name, reason from dba_outstanding_alerts where object_name  
like 'XYZ%'; 

OBJECT_NAME           REASON                                                       
------------------    --------------------------------------------------------
XYZ                   Tablespace [XYZ] is [96 percent] full  

Or the alert has been generated but cleared in the database :

SQL> SELECT REASON
  2  , TO_CHAR(CREATION_TIME,'dd-mon-yyy hh24:mi:ss') ctime
  3  , TO_CHAR(TIME_SUGGESTED,'dd-mon-yyy hh24:mi:ss') rtime
  4  FROM DBA_ALERT_HISTORY
  5  WHERE OBJECT_TYPE = 'TABLESPACE'
  6  AND UPPER(RESOLUTION) = 'CLEARED'
  7  ORDER BY CREATION_TIME ASC;

REASON                                                                          
------------------------------------------------------------------------------CTIME               RTIME                                                       
------------------- -------------------                                       
Tablespace [XYZ] is [96 percent] full                             
14-sep-008 08:03:15 14-sep-008 08:21:56   

 

 

Cause

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