Flashback log management

 Hi,

We are using Flashback Database in one of our Databases (Data Guard Configuration) with below configuration.

db_recovery_file_dest_size : 5gb

db_recovery_file_dest= <<some location..>>

When I check the disk space used  at the above location it shows more than 5gb. Pls check below the few details that may help to understand the settings.

I wanted to know  (a) if this is a normal behaviour.

                               (b) shouldn't the used disk space be below 5gb always.

                               (c) how do I know if Oracle is reclaiming the reclaimable space with the recovery_file_area.

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SQL> SELECT * FROM V$RECOVERY_FILE_DEST;