An sbspace contains a metadata area for each chunk in the
sbspace.
As with the chunk header pages, four areas are exclusive
to the first chunk in a sbspace: the sbspace descriptor tblspace,
the chunk adjunct tblspace, and the level-1 and level-2 archive tblspaces.
The tblspace header section contains a tblspace header for each of
these tblspaces (notably excluding the tblspace tblspace). Structure of the metadata area for a
single-chunk sbspace shows the layout of
the metadata in the single-chunk sbspace. Figure 1: Structure of the metadata area for a
single-chunk sbspace
When you specify the sbspace name in the oncheck -ps option, you can display the number of pages allocated and used for
each tblspace in the metadata area.
The following items describe
how the metadata area grows:
The sbspace descriptor tblspace does not grow.
The chunk adjunct tblspace grows as chunks are added.
The LO header tblspace grows
as large objects are added to the chunk.
The tblspace for user-data free list grows if free spaces in the
chunk are heavily fragmented.
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