Answer / pravin kadam

Database buffers store the most recently used blocks of
database data. It can also contain modified data that has
not yet been permanently written to disk.

Answer / ankur akash

'Database buffer cache' is a part of SGA [Shared Global
Area] architecture.

The default parameter is db_buffer_Cache
Starting from Oracle 10G DB, to determine database buffer
size, the parameter is, db_nk_buffer_Cache
where n=2,4,8,16,32 [8k is the default one].

Database buffer cache is a virtual passage where data is
inserted from 'Most recently used' and will move forward in
the queue towards the 'least recently used' end.

The buffers are named as empty, pinned and dirty.

Once the data gets committed 'DBWn' will write the data from
the database buffer cache to the file on disk.

Answer / s.rahman beevi

it is the part of sga and then it stores copis of data
blocks that have been retrrieved from the datafiles

Answer / ravi dutta., oracle dba

Database buffer is part of SGA, Which it is contain oracle
blocks copied from datafile and modification carried in this
area. In oracle 9i BUFFER CACHE is divided into three parts
buffer_cache, buffer_keep_cache,buffer_recycle_cahce.

THANKS

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