VERITAS Storage Foundation 4.1 Oracle Administrator's Guide

Oracle File Mapping (ORAMAP) Prerelease 8 September 2005, 8:55am
148 VERITAS Storage Foundation for Oracle Administrator’s Guide
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$map_subelement.
These four types of mapping components completely describe the mapping information for an
Oracle instance.
Storage Mapping Views
The mapping information that is captured is presented in Oracle’s dynamic performance views.
Brief descriptions of these views are provided below. For more detailed information, refer to your
Oracle documentation.
View Description
V$MAP_LIBRARY Contains a list of all the mapping libraries that have been
dynamically loaded by the external process.
V$MAP_FILE Contains a list of all the file mapping structures in the
shared memory of the instance.
V$MAP_FILE_EXTENT Contains a list of all the file extent mapping structures in
the shared memory of the instance.
V$MAP_ELEMENT Contains a list of all the element mapping structures in the
SGA of the instance.
V$MAP_EXT_ELEMENT Contains supplementary information for all element
mapping structures.
V$MAP_SUBELEMENT Contains a list of all subelement mapping structures in the
shared memory of the instance.
V$MAP_COMP_LIST Describes the component list associated with the element
name.
V$MAP_FILE_IO_STACK Contains the hierarchical arrangement of storage
containers for the file. This information is displayed as a
series of rows. Each row represents a level in the hierarchy.