Oracle Database 12c: Installation and Administration — Question 70

Examine the current value for the following parameters in your database instance:

SGA_MAX_SIZE = 1024M -

SGA_TARGET = 700M -

DB_8K_CACHE_SIZE = 124M -

LOG_BUFFER = 200M -
You issue the following command to increase the value of DB_8K_CACHE_SIZE:
SQL> ALTER SYSTEM SET DB_8K_CACHE_SIZE=140M;
Which statement is true?

Answer options

• A. It fails because the DB_8K_CACHE_SIZE parameter cannot be changed dynamically.
• B. It succeeds only if memory is available from the autotuned components if SGA.
• C. It fails because an increase in DB_8K_CACHE_SIZE cannot be accommodated within SGA_TARGET.
• D. It fails because an increase in DB_8K_CACHE_SIZE cannot be accommodated within SGA_MAX_SIZE.

Correct answer: D

Explanation

The correct answer is D because the increase in DB_8K_CACHE_SIZE would exceed the total limit defined by SGA_MAX_SIZE. The other options are incorrect as DB_8K_CACHE_SIZE can be changed dynamically, and there is no restriction from SGA_TARGET or autotuned components affecting this change in this scenario.