Subsystem parameters at start

Starting Db2 invokes the load module for subsystem parameters. This load module contains information that was specified when Db2 was installed.

For example, the module contains the name of the IRLM to connect to. In addition, it indicates whether the distributed data facility (DDF) is available and, if it is, whether it should be automatically started when Db2 is started. You can specify PARM (module-name) on the START DB2 command to provide a parameter module other than the one that is specified at installation.

The START DB2 command starts the system services address space (ssnmMSTR), the database services address space (ssnmDBM1), and depending on the DDF subsystem parameter setting, the DDF address space (ssnmDIST). Optionally, the Internal resource lock manager (IRLM) address space (irlmproc) can also be started automatically.

A conditional restart operation is available, but no parameters indicate normal or conditional restart on the START DB2 command.