7 Replies Latest reply: Apr 18, 2013 10:37 AM by Sivaprasad S RSS

    EM Alert: Warning:+ASM Disk Group requires rebalance

    Sivaprasad S
      Environment:

      O.S Version : HP-UX B.11.31 U ia64
      Oracle DB Version : 11.2.0.3.0 , Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 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
      Severity=Warning
      Target Name=+ASM_dbsrver.siva.com
      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_?