To answer this question, you need to understand the concept of Automatic Shared Memory Management (ASMM) and the background processes involved in managing the memory component.
ASMM is a feature in Oracle Database that dynamically manages the size of the System Global Area (SGA) components, such as buffer cache, shared pool, and large pool. It automatically adjusts the sizes of these components based on the workload of the database.
The background process that ASMM uses to coordinate the sizing of the memory component is called Memory Manager (MMAN). The MMAN process is responsible for dynamically managing the memory allocation and deallocation within the SGA.
Let's go through each option to understand why it is correct or incorrect:
Option A) PMON - The Process Monitor (PMON) process is responsible for process recovery and cleaning up resources when a user process fails. It is not involved in coordinating the sizing of the memory component in ASMM.
Option B) SMON - The System Monitor (SMON) process performs recovery and cleanup operations during database startup and shutdown. It is not involved in coordinating the sizing of the memory component in ASMM.
Option C) MMNL - The Memory Monitor Light (MMNL) process is responsible for monitoring and managing the Automated Maintenance Tasks. It is not involved in coordinating the sizing of the memory component in ASMM.
Option D) MMAN - The Memory Manager (MMAN) process is responsible for coordinating the sizing of the memory component in ASMM. It dynamically manages the allocation and deallocation of memory within the SGA.
Option E) MMON - The Manageability Monitor (MMON) process is responsible for collecting and managing performance data for the Oracle database. It is not directly involved in coordinating the sizing of the memory component in ASMM.
The correct answer is Option D) MMAN. This option is correct because the Memory Manager (MMAN) process is the background process used by ASMM to coordinate the sizing of the memory component.