SGA
  Database buffer cache 
  Redo log buffer 
  Shared pool 
    Data dictionary cache 
    Library cache

select * from v$sga
 1  row(s) selected
        NAME            VALUE   
 -------------------- ---------- 
 
Fixed Size                282516  
Variable Size           71303168  
Database Buffers        33554432  
Redo Buffers              532480  

 3  row(s) retrieved

select * from v$sgastat
 1  row(s) selected
    POOL               NAME               BYTES   
 ----------- -------------------------- ---------- 
 
            fixed_sga                       282516  
            db_block_buffers              33554432  
            log_buffer                      524288  
shared pool 1M buffer                      1049088  
shared pool Checkpoint queue                141152  

 5  row(s) retrieved