IBM 000-8697 Manual Do Utilizador

Installation and Initial Configuration

ROOTSIZE

specifies the size of the initial chunk of the root dbspace, expressed

in kilobytes. The size that you select depends on your immediate plans for
OnLine

.

The

ROOTSIZE

 default value is 20,000 KB (about 19.5 MB).

If you are configuring OnLine for a learning environment, plan to make the
root dbspace 20 to 60 MB. If you plan to add test databases to this system,
choose the larger size. Enter this value in two places on the configuration
worksheet. First, enter it as the size of the root dbspace in the

ROOTSIZE

field.

Second, enter it into the field labeled

Size of the root dbspace

 on the

second page under the heading

Disk Layout

.

If you are configuring OnLine for a production environment, you need to
calculate an appropriate size for the root dbspace.

At the time of initial configuration, the root dbspace must be large enough to
accommodate five possible components:

■

Physical log

■

Logical log files

■

Disk space allocated to accommodate temporary internal tables
needed by OnLine for processing

■

Disk space allocated to accommodate any databases or tblspaces that
you might want to store in the root dbspace

■

Disk space to accommodate OnLine control information

Your worksheet contains blanks for you to enter the sizes of these component
parts of the root dbspace, as you determine them. Do not complete this
section of your worksheet now. You will complete each blank, A through J, as
you work through the disk allocation tasks. (Refer to