Hi, Data Dictionary contains metadata and you know very well rest. X$tables normally resides in memory itself and you can query all x$tables using this query . select kqftanam from x$kqfta; Regards Bala On Tue, Sep 22, 2009 at 1:45 AM, Martin Berger <martin.a.berger@xxxxxxxxx> wrote: > > Hi List, > once again I stumble about two realy dumb (and related) questions: > 1) what is the data dictionary (or how can I identify objects which belongs > to it)? > 2) is there any spyhole to view into the row cache (like v$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 > > > -- > //www.freelists.org/webpage/oracle-l -- //www.freelists.org/webpage/oracle-l