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7 Replies Latest reply: Apr 18, 2013 8:37 AM by Sivaprasad S RSS

EM Alert: Warning:+ASM Disk Group requires rebalance

Sivaprasad S Newbie
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O.S Version : HP-UX B.11.31 U ia64
Oracle DB Version : , Oracle Database 11g Enterprise Edition Release - 64bit Production
Database files are on : ASM Disk Group

It is about the ASM Diskgroup low disk space alert by Oracle Enterprise Manager.

Message=Disk Group DG_FLASH_01 requires rebalance because at least one disk is low on space.
Metric=Disk Minimum Free (%) without Rebalance
Metric value=18.961548
Disk Group Name=DG_FLASH_01
Target type=Automatic Storage Management

There is only 1 LUN assigned to this diskgroup +DG_FLASH_01_.

We have a Oracle Enterprise Manager Grid Control Job MN_DBSRVR_DEL_ARCHIVELOGS runs every 12 hours by 1 AM and again at 1PM daily. It cleans-up the archivelogs older than 3 days old. The FLASH diskgroup is continuously being written with new files for both archivelogs and flashback logs.

If there was multiple disks and a vast difference between the files on the different LUNs then a rebalance would be good to run.

How to address such recurring alert of " *Disk Group DG_FLASH_01 requires rebalance because at least one disk is low on space*. " with _only one LUN on the +ASM Diskgroup_?                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           


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