Справочник Пользователя для IBM 000-8697
2-100
IBM Informix OnLine Database Server Administrator’s Guide
Reserved Pages
PAGE_PCHUNK
The seventh reserved page in the root dbspace is
PAGE_1PCHUNK
. The eighth
reserved page,
PAGE_2PCHUNK
, is the second page in the pair.
The tbinit daemon uses the primary chunk page to describe each chunk, its
pathname, its relation to the dbspace, and its current status.
pathname, its relation to the dbspace, and its current status.
Below are listed the primary chunk fields and definitions. To obtain a listing
of the reserved page, execute the command tbcheck -pr.
of the reserved page, execute the command tbcheck -pr.
Date/time created
Date and time the dbspace was created
Dbspace name
Dbspace name
Dbspace owner
Dbspace owner
Field Name
Description
Primary chunk number
Chunk number
Next chunk in dbspace
Number of the next chunk in the dbspace
Chunk offset
Offset of chunk, in pages
Chunk size
Number of pages in the chunk
Number of free pages
Number of free pages in the chunk
Dbspace number
Number of this chunk’s dbspace
Overhead
Free-map page address (blobspace only)
(1 of 2)
Field Name
Description
(2 of 2)