IBM 000-8697 Manual Do Utilizador
2-90
IBM Informix OnLine Database Server Administrator’s Guide
Structure of an Additional Dbspace Chunk
Structure of an Additional Dbspace Chunk
You can create a dbspace that comprises more than one chunk. The initial
chunk in a dbspace contains the tblspace tblspace for the dbspace. Additional
chunks do not. When an additional chunk is first created, it contains the
following structures:
chunk in a dbspace contains the tblspace tblspace for the dbspace. Additional
chunks do not. When an additional chunk is first created, it contains the
following structures:
■
Two reserved pages (duplicates of the first two reserved pages in the
root dbspace,
root dbspace,
■
The first chunk free-list page (
■
Unused pages
illustrates the structure of all additional chunks. (The structure
also applies to additional chunks in the root dbspace.)
Figure 2-14
Structures within
additional chunks
of a dbspace, after
the chunk is
created.
Dbspace
(additional chunk)
(additional chunk)
Reserved
pages
Chunk free-list page
Unused pages