V$SGA_DYNAMIC_FREE_MEMORY

Oracle 11gR1

V$SGA_DYNAMIC_FREE_MEMORY displays information about the amount of SGA memory available for future dynamic SGA resize operations.

Column	Datatype	Description
CURRENT_SIZE	NUMBER	Amount of available memory (in bytes)

Note:

select * from v$sga_dynamic_free_memory;

CURRENT_SIZE

0

If you are migrating from a manual management scheme, execute the following query on the instance running in manual mode to get a value for SGA_TARGET:

select (

(select sum(value) from v$sga) –

(select current_size from v$sga_dynamic_free_memory)

) "SGA_TARGET"

from dual;

The following views provide information about the SGA components and their dynamic resizing.

View	Description
V$SGA	Displays summary information about the system global area (SGA).
V$SGAINFO	Displays size information about the SGA, including the sizes of different SGA components, the granule size, and free memory.
V$SGASTAT	Displays detailed information about the SGA.
V$SGA_DYNAMIC_COMPONENTS	Displays information about the dynamic SGA components. This view summarizes information based on all completed SGA resize operations since instance startup.
V$SGA_DYNAMIC_FREE_MEMORY	Displays information about the amount of SGA memory available for future dynamic SGA resize operations.
V$SGA_RESIZE_OPS	Displays information about the last 400 completed SGA resize operations.
V$SGA_CURRENT_RESIZE_OPS	Displays information about SGA resize operations that are currently in progress. A resize operation is an enlargement or reduction of a dynamic SGA component.
V$SGA_TARGET_ADVICE	Displays information that helps you tune SGA_TARGET.

Oracle dynamic performance views