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Re: New Dynamic Views - GV$ ???

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.


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

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