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  Oracle Database Tips by Donald Burleson

Oracle10g Grid Computing with RAC
Chapter 8 - RAC Administration

Identical Parameters (Across Instances)

  Parameters                       Description


Specifies the size (in bytes) of Oracle database blocks.


In a distributed database system, db_domain specifies the logical location of the database within the network structure.


Specifies the maximum number of database files that can be opened for this database.


Specifies a database identifier. It must correspond to the name specified in the create database statement.

DML_LOCKS (if 0, same on all)

They can be different if the dml_locks are positive.


Controls the mapping of pre-release 9.0.1 parallel cache management (PCM) locks to data files.


Specifies the maximum number of users you can create in the database.



Specifies the maximum amount of time allowed until the system change number (SCN), held in the SGA of an instance, and is refreshed by the log writer process (LGWR). It determines whether the local SCN should be refreshed from the lock value when getting the snapshot SCN for a query. Units are in hundredths of seconds.

Table 8.1 Parameters that should remain identical among the instances

The above text is an excerpt from:

Oracle 10g Grid & Real Application Clusters
Oracle 10g Grid Computing with RAC
ISBN 0-9744355-4-6

by Mike Ault, Madhu Tumma


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