what is the data dictionary?
- From: Martin Berger <martin.a.berger@xxxxxxxxx>
- To: ORACLE-L <oracle-l@xxxxxxxxxxxxx>
- Date: Mon, 21 Sep 2009 22:15:57 +0200
Hi List,
once again I stumble about two realy dumb (and related) questions:
1) what is the data dictionary (or how can I identify objects which
belongs to it)?
2) is there any spyhole to view into the row cache (like v$bh for the
buffer cache)?
According to the documentation, the data dictionary is
http://download.oracle.com/docs/cd/E11882_01/server.112/e10713/glossary.htm#CNCPT2033
"A read-only collection of database tables and views containing
reference information about the database, its structures, and its
users."
The row cache is defined with
http://download.oracle.com/docs/cd/E11882_01/server.112/e10713/glossary.htm#CNCPT44459
"A memory area in the shared pool that holds data dictionary
information. The data dictionary cache is also known as the row cache
because it holds data as rows instead of buffers, which hold entire
data blocks."
Even v$rowcache seems not as featured as I'd like it to be.
This question is not based on any need, just pure curiosity.
thank you for any hint,
Martin
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