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DB2 Profile Registry

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It is a feature of DB2 using which you can change various environment variables which can have effect on server even outside the instance and database configuration settings. It is used to alter operations of your DB2 data server.

Main advantage of it is that after doing any changes in environment variables you need not to reboot your server for changes to take effect, which was required earlier.
Some parameters which can be changed using it are: DB2_SKIPINSERTED, DB2_MDC_ROLLOUT, DB2COMM.

It is divided into 4 regions:

1.     DB2 Instance Level Profile Registry:

Majority of environment variables are placed here. Variables related to particular instance are kept in this registry. Values defined here override global level settings.

     2.     DB2 Global Level Profile Registry:

If a variable is not set for a particular instance, this registry will be used.

     3.     DB2 Instance Node Level Profile Registry:

Variables related to a partition in a partitioned-database environment are set here.

     4.     DB2 Instance Profile Registry:

                        It contains list of all instance names recognized by system. You can see them using DB2ILIST.
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