Veritas Storage Foundation for Oracle 5.0 Administrator's Guide, HP-UX 11i v3, Second Edition, December 2008

This component contains information about the element's mapping structure,
such as the element's size, type, number of subelements, and a brief description.
Element components are exported to the user through V$MAP_ELEMENT.
■ Subelement components
A mapping subelement component describes the link between an element and
the next element in the I/O stack. The subelement component contains the
subelement number, size, the element name for the subelement, and the
element offset. Subelement components are exported to the user through
V$MAP_SUBELEMENT.
These mapping components completely describe the mapping information for an
Oracle instance.
Storage Mapping views
The mapping information that is captured is presented in Oracle's dynamic
performance views. Brief descriptions of these views are provided in Table 8-1.
For more detailed information refer to your Oracle documentation.
Table 8-1
Storage mapping information in Oracle dynamic performamce views
DescriptionView
Contains a list of all the mapping libraries that have been
dynamically loaded by the external process.
V$MAP_LIBRARY
Contains a list of all the file mapping structures in the
shared memory of the instance.
V$MAP_FILE
Contains a list of all the file extent mapping structures in
the shared memory of the instance.
V$MAP_FILE_EXTENT
Contains a list of all the element mapping structures in
the SGA of the instance.
V$MAP_ELEMENT
Contains supplementary information for all element
mapping structures.
V$MAP_EXT_ELEMENT
Contains a list of all subelement mapping structures in
the shared memory of the instance.
V$MAP_SUBELEMENT
Describes the component list associated with the element
name.
V$MAP_COMP_LIST
145Using Storage Mapping
Oracle file mapping (ORAMAP)