Re: New Dynamic Views

From: Brian Wisniewski <brian_wisniewski_at_yahoo.com>
Date: Thu, 01 Feb 2001 06:04:44 -0800
Message-ID: <F001.002A7264.20010201053526@fatcity.com>

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 <chandini.paterson_at_morse.com> 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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-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.com
-- 
Author: Brian Wisniewski
  INET: brian_wisniewski_at_yahoo.com

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Received on Thu Feb 01 2001 - 08:04:44 CST

Re: New Dynamic Views - GV$ ???