OCP 1Z0 052 V9.02 177

177.Which two statements are true regarding the SGA_TARGET initialization parameter? (Choose two.)

A. It can be increased up to the value of the SGA_MAX_SIZE parameter.

B. Increasing the value of the SGA_TARGET parameter distributes the increased memory among all the

autotuned components.

C. Reducing the value of the SGA_TARGET parameter deallocates memory from both autotuned and

manually sized components.

D. Increasing the value of SGA_TARGET up to the value of SGA_MAX_SIZE disables the automatic

shared memory management feature.

Answer: AB

http://docs.oracle.com/cd/E11882_01/server.112/e41573/memory.htm#PFGRF94255

7.1.3 Automatic Shared Memory Management

Automatic Shared Memory Management simplifies the configuration of the SGA. To use Automatic Shared Memory Management,
set the

SGA_TARGET

initialization parameter to a nonzero value and set the

STATISTICS_LEVEL

initialization parameter
to

TYPICAL

or

ALL

. Set the value of the

SGA_TARGET

parameter to the amount of memory that you intend to dedicate for the SGA. In response to the workload
on the system, the automatic SGA management distributes the memory appropriately for the following memory pools:

Database buffer cache (default pool)

Shared pool

Large pool

Java pool

Streams pool

If these automatically tuned memory pools had been set to nonzero values, those values are used as minimum levels by Automatic Shared Memory Management. You would set minimum values if an application component needs a minimum amount of memory to function properly.

SGA_TARGET

is a dynamic parameter that can be changed by accessing the SGA Size Advisor from the Memory Parameters SGA page in Oracle Enterprise Manager, or by querying the

V$SGA_TARGET_ADVICE

view
and using the

ALTER

SYSTEM

command.

SGA_TARGET

can
be set less than or equal to the value of

SGA_MAX_SIZE

initialization parameter. Changes in the value of

SGA_TARGET

automatically
resize the automatically tuned memory pools.