ASM(Automatic Storage Management)
ASM instance:
ASM instance is a combination of the process and memory components for ASM.
The combination of the background processes and the SGA is called an Oracle ASM instance or an Oracle Database instance. The instance represents the CPU and RAM components of a running ASM environment.
The SGA in an ASM instance is different in memory allocation and usage than the SGA in an database instance. The SGA in the ASM instance is divided into four primary areas:
1. Shared Pool: Used for metadata information
2. Large Pool: Used for parallel operations
3. ASM Cache: Used for reading and writing blocks during re-balance operations
4. Free Memory: Unallocated memory available
推荐的最小的ASM实例的最小内存数量是256M.
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