Active Memory Expansion now available on VLP.
Find out how to use AME from the VLP user guide - http://cot.ag/byaXp6
Active Memory Expansion is an innovative POWER7 technology that allows the effective maximum memory capacity to be up to 100% larger than the true physical memory maximum for AIX 6.1 partitions.
Active Memory Expansion relies on compression of in-memory data to increase the amount of data that can be placed into memory and thus expand the effective memory capacity of a POWER7 system. The in-memory data compression is managed by the system, and this compression is transparent to applications and users.
Active Memory Expansion is configurable on a per-logical partition (LPAR) basis. Thus, Active Memory Expansion can be selectively enabled for one or more LPAR's on a system.
When Active Memory Expansion is enabled for a LPAR, the operating system will compress a portion of the LPAR's memory and leave the remaining portion of memory uncompressed. This results in memory effectively being broken up into two pools - a compressed pool and an uncompressed pool. The operating system will dynamically vary the amount of memory that is compressed based on the workload and the configuration of the LPAR.
Because Active Memory Expansion relies on memory compression, some additional CPU utilization will be consumed when Active Memory Expansion is in-use. The amount of additional CPU utilization needed for Active Memory Expansion will vary based on the workload and the level of memory expansion being used.
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