ASM 专栏

 

ASMM (automatic shared memory management): Introduced in 10g, this allows you to tell the instance how muchmemory to allocate for the SGA as a whole, allowing the instance to decidedynamically how much should be allocated to each large-scale structure withinthe SGA.

 

ASSM (automatic segment space management): The default space management mechanism for tablespaces, originallyintroduced in 9i to relieve the DBA of a need to worry about setting the numberof freelists or freelist groups for a data object.

 

 

AUM (automatic undo management): Introduced in 9i as a mechanism to relieve the DBA of a need tospecify the number and size of undo (rollback) segments.

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