ORACLE 11g AMM

Question

Hellow, my questions concern ORACLE 11g,
First topic
Tell me if i'm right:
if i set server parameters:
memory_max_target to 1.5 GB
memory_target to 1GB
pga_aggregate_target to 100MB
sga_target to 500MB
Q1.That's mean DB will use at least 500MB for all SGA components and at least 100MB for Server Processes?
Q2.And if it's true Oracle will tune SGA szie above sga_target and for PGA above 100MB if necessary?
Second topic:
If I set :
memory_max_target to 1.5 GB
memory_target to 1GB
pga_aggregate_target to 0
sga_target to 0
Q3.That's mean DB wil tune SGA component's size and PGA buffer it self up to 1GB for both elements?
Thanks for replay.

Answer 1

From MOS ID 169706.1
Automatic Memory Management
Starting with Oracle Database 11g, the Automatic Memory Management feature requires more shared memory (/dev/shm) and file descriptors. The shared memory should be sized to be at least the greater of MEMORY_MAX_TARGET and MEMORY_TARGET for each Oracle instance on the computer. To determine the amount of shared memory available, enter the following command: # df -k /dev/shm/
Note: MEMORY_MAX_TARGET and MEMORY_TARGET cannot be used when LOCK_SGA is enabled or with huge pages on Linux