These are parallel server views.
Taken from the reference manual.
GV$ Views
For almost every V$ view described in this chapter, Oracle has a
corresponding GV$(global V$) view. In a parallel server environment,
querying a GV$ view retrieves the V$ view information from all
qualified instances. In addition to the V$ information, each GV$ view
contains an extra column named INST_ID of datatype INTEGER. The INST_ID
column displays the instance number from which the associated V$ view
information was obtained. The INST_ID column can be used as a filter to
retrieve V$ information from a subset of available instances. For
example, the query:
SELECT * FROM GV$LOCK WHERE INST_ID = 2 OR INST_ID = 5
retrieves the information from the V$ views on instances 2 and 5.
In order to query the GV$ views, the value of the PARALLEL_MAX_SERVERS
parameter must be greater than zero on all instances mounting the
database. The sections that follow list the columns and public synonyms
for the dynamic performance views.
See Also: Oracle8i Parallel Server Concepts.
- Brian
--- Chandini Paterson <[EMAIL PROTECTED]> wrote:
> Hi,
> I was just looking at the data dictionary (dict table) and came
> upon a
> whole list of views that have similar names to the dynamic views
> (V$), but
> all start with GV$.
> EG:- GV$DLM_LOCKS
> GV$LOCK
> etc.
>
> There almost seems to be one GV$ view for each V$ view. Would
> somebody tell
> me what these views are and why they are used. Oh, I am on ver 8.1.5
> by the
> way.
>
>
> Thanks a lot
> Chandini Paterson
>
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