Datasheet

Working with the ASM Instance 7
# Diagnostics and Statistics
###########################################
background_dump_dest=/u01/app/oracle/admin/+ASM/bdump
core_dump_dest=/u01/app/oracle/admin/+ASM/cdump
user_dump_dest=/u01/app/oracle/admin/+ASM/udump
###########################################
# Miscellaneous
# Of course – set compatible to your version of Oracle
###########################################
instance_type=asm
compatible=11.1.0.6.0
remote_login_passwordfile=exclusive
Note the following Oracle parameters that are specific to ASM instances:
INSTANCE_TYPE

: Used only with an ASM instance, this parameter indicated to Oracle
that this is an ASM instance. The default value is
RDBMS, which indicates the instance is
an Oracle database instance. This parameter is not dynamic and is the only mandatory
parameter in an ASM instance.
ASM_DISKSTRING

: This parameter indicates where Oracle should search for disk devices
to be used by ASM. We will discuss this parameter in more detail later in this section.
This parameter can be dynamically changed.
ASM_DISKGROUPS

: This parameter lists ASM disk groups that ASM should mount when
it is started. You can also use the
alter diskgroup all mount command to cause
these disk groups to be mounted. This parameter can be dynamically changed.
ASM_POWER_LIMIT

: This parameter controls the rate at which ASM can rebalance disks by
increasing or decreasing the degree of parallelism used. Lower values will slow rebalanc-
ing but will also result in less of an IO impact by those operations. Higher values may
speed up rebalancing by parallelizing the rebalance operation. The default is 1, and this
is typically sufficient. This parameter can be set dynamically.
Did you notice that we did not include any of the memory settings (for example,
SHARED_
POOL_SIZE
or DB_CACHE_SIZE) in this parameter file? While ASM does allocate memory, the
default settings for the memory parameters are often quite enough.
Step 3: Performing Any Microsoft Windows–Specific Configuration
If you are running in a Windows environment, you will need to create the ASM service
with the
oradim utility. Here is an example of this operation:
C:Oracle\> oradim -new -asmsid +ASM -syspwd my_password
-pfile C:\oracle\product\11.1.0.6\admin\+ASM\pfile\init.ora -spfile
-startmode manual -shutmode immediate
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