IBM 000-8697 User Manual
System Architecture
2-107
Database Tblspace
tblspace Tblspace Bit-Map Page
The first page of the tblspace tblspace, like the first page of any initial extent,
is a bit map that describes the page fullness of the following pages. Each page
that follows has an entry on the bit-map page. If needed, additional bit-map
pages are located throughout the contiguous space allocated for the tblspace,
arranged so that each bit map describes only the pages that follow it, until the
next bit map or the end of the dbspace. The bit-map pages are chained in a
linked list.
is a bit map that describes the page fullness of the following pages. Each page
that follows has an entry on the bit-map page. If needed, additional bit-map
pages are located throughout the contiguous space allocated for the tblspace,
arranged so that each bit map describes only the pages that follow it, until the
next bit map or the end of the dbspace. The bit-map pages are chained in a
linked list.
Database Tblspace
The database tblspace appears only in the initial chunk of the root dbspace.
The database tblspace contains one entry for each database managed by
OnLine.
The database tblspace contains one entry for each database managed by
OnLine.
The tblspace number of the database tblspace is always 0x1000002. This
tblspace number appears in a tbstat -t listing if the database tblspace is active.
Refer to
tblspace number appears in a tbstat -t listing if the database tblspace is active.
Refer to
for more details about the tblspace number.
Figure 2-20
The database
tblspace appears
only in the root
dbspace,
following the
tblspace tblspace.
Reserved pages
Tblspace tblspace
Database tblspace
Chunk-free-list page
Tblspace tblspace
(continued)
Root dbspace initial chunk
free pages