Thomas 的IBM BLOG

在配置Power System 最麻煩的就是Hypervisor 佔用的估算, 沒有估算到會造成驗收時每個LPAR實際分配到少於規劃的大小

參考來源文件及內容如下

IBM PowerVM Virtualization Introduction and Configuration SG24-7940-05

Depending on the system I/O and partition configuration, between 5% and 15%

of the total system memory is used by hypervisor functions on a system on which

Active Memory Mirroring is not being used. Use of Active Memory Mirroring for

the hypervisor doubles the amount of memory that is used by the hypervisor, so

appropriate memory planning must be performed. The System Planning Tool

(SPT) can help estimate the amount of memory that is required.

SPT Download address

http://www-947.ibm.com/systems/support/tools/systemplanningtool/download.shtml

如下可看到需要約6GB 左右, 會跟lpar 的數量及分配的cpu & memory 有關