11g ASM例項記憶體大小與diskgroup大小的關係

在給diskgroup增加磁碟時，需要同步檢查ASM例項記憶體是否滿足需求 ，因為： 



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

對於high冗餘情況的disk groups, 需要至少6MB記憶體，每增加33GB需要額外的1MB共享記憶體。