在给diskgroup增加磁盘时，需要同步检查ASM实例内存是否满足需求 ，因为：
https://docs.oracle.com/cd/E11882_01/server.112/e18951/asminst.htm#OSTMG94083
For disk groups using external redundancy, every 100 GB of space needs 1 MB of extra shared pool plus 2 MB
For disk groups using normal redundancy, every 50 GB of space needs 1 MB of extra shared pool plus 4 MB
For disk groups using high redundancy, every 33 GB of space needs 1 MB of extra shared pool plus 6 MB
对于high冗余情况的disk groups, 需要至少6MB内存，每增加33GB需要额外的1MB共享内存。
https://docs.oracle.com/cd/E11882_01/server.112/e18951/asminst.htm#OSTMG94083
For disk groups using external redundancy, every 100 GB of space needs 1 MB of extra shared pool plus 2 MB
For disk groups using normal redundancy, every 50 GB of space needs 1 MB of extra shared pool plus 4 MB
For disk groups using high redundancy, every 33 GB of space needs 1 MB of extra shared pool plus 6 MB
对于high冗余情况的disk groups, 需要至少6MB内存，每增加33GB需要额外的1MB共享内存。
来自 “ ITPUB博客 ” ，链接：https://blog.itpub.net/35489/viewspace-1990104/ ，如需转载，请注明出处，否则将追究法律责任。
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