Planning for the IBM AIX Dynamic System Optimizer
There are some considerations when planning to install AIX® Dynamic System Optimizer.
When preparing to install AIX Dynamic System Optimizer,
consider the following requirements:
- The ASO daemon is started at boot time, but it is inactive by default. It can be activated by using the asoo command.
- ASO is supported on the following versions of the AIX operating system and POWER
processors:
AIX version POWER processor IBM® AIX 7 with Technology Level 1 Service Pack 1, or later POWER7® IBM AIX 7 with Technology Level 1 Service Pack 7,or later POWER8® IBM AIX 7 with Technology Level 5, or later POWER9 - Various optimizations are supported at different operating system
levels:
- Minimum level for the cache affinity optimization and the memory affinity optimization is IBM AIX 7.1 with Technology Level 1 service pack 1 or IBM AIX 6.1 with Technology Level 8.
- The large page and data stream prefetch optimizations require the AIX Dynamic System Optimizer package (dso.aso) that is supported on IBM AIX 7.1 with Technology Level 2 service pack 1 and IBM AIX 6.1 with Technology Level 8 service pack 1.
- Minimum level for POWER8 support is IBM AIX 7.1 Technology Level 4 service pack 2, or IBM AIX 7.2 service pack 2.
- Running ASO in a dedicated processor environment requires that Virtual Processor Management (core folding) is disabled, which is the default setting. Enabling Power® Management on the Hardware Management Console (HMC) enables Virtual Processor Management to be started in a dedicated environment and disables ASO.
- Enabling Active Memory Sharing disables all of the optimizations except the data stream prefetch optimization.
- When processor resources are capped in a shared processor LPAR (SPLPAR) environment, the system entitlement must be a minimum of two cores. The entitlement for each virtual processor must be high enough to ensure that ASO can optimize the workload.
- For large page optimization, the system must have a minimum of 16 GB of system memory.