ASM rebalance ASM_POWER_LIMIT parameter

For COMPATIBLE.ASM disk group attribute is set to 11.2.0.2 or higher, the range of values is 0 to 1024.

For COMPATIBLE.ASM disk group attribute is set to lower than 11.2.0.2 , the range of values is 0 to 11.

We can change the rebalance power either at the ASM instance level or at the individual disk group level.

Changing  the value at the instance level, this will alter the power limit for any new operations, but not the existing ones.

SQL > alter system set asm_power_limit=5 scope=both;

Change the value at the disk group level, this will change an existing operation on the diskgroup involved in the current operation.

SQL> alter diskgroup diskgroup1 rebalance power 8;

The effect of the change can be viewed from v$asm_operation:

SQL> select * from gv$asm_operation;
Advertisements
This entry was posted in GI and RAC and tagged , . Bookmark the permalink.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s