False Alert Raised For "Disk Minimum Free (%) without Rebalance" Metric

(Doc ID 2113759.1)

Last updated on MARCH 08, 2017

Applies to:

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

Symptoms

EM Cloud Control is monitoring an ASM target. 

There is no imbalance in Disk Group but alert is raised for "Disk Minimum Free (%) without Rebalance" metric. 

Ex: The following query shows there is no imbalance and FREE_MB is same for all disks.  

SQL> select name,path,header_status,TOTAL_MB,FREE_MB from v$asm_disk where GROUP_NUMBER=2 order by FREE_MB;

NAME PATH HEADER_STATU TOTAL_MB FREE_MB

-------------------- ------------------------------ ------------ ---------- ----------
DATA_ABC_0000 /dev/ABC/data/DATA_ABC_11000 MEMBER 276210 51934
DATA_ABC_0010 /dev/ABC/data/DATA_ABC_11010 MEMBER 276210 51964
DATA_ABC_0004 /dev/ABC/data/DATA_ABC_11004 MEMBER 276210 51964
.
.
.

Cause

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