Keep pool, recycle pool and default pool, (all are part of the buffer cache)
Columns ___________________________ BUFFERS TARGET_SIZE TARGET_BUFFERS PREV_SIZE PREV_BUFFERS LO_BNUM HI_BNUM LO_SETID HI_SETID SET_COUNT ID NAME BLOCK_SIZE RESIZE_STATE CURRENT_SIZE
Related:
V$CACHE V$CLASS_PING V$DLM_CONVERT_LOCAL V$DLM_CONVERT_REMOTE V$DLM_LATCH V$DLM_MISC V$ENQUEUE_LOCK V$EVENT_NAME V$LATCH V$LATCHHOLDER V$LATCHNAME V$LATCH_CHILDREN V$LATCH_MISSES V$LATCH_PARENT V$LIBRARYCACHE V$LOCK V$_LOCK V$LOCKED_OBJECT V$LOCKS_WITH_COLLISIONS V$LOCK_ACTIVITY V$LOCK_ELEMENT V$RESOURCE V$RESOURCE_LIMIT V$TRANSACTION_ENQUEUE