User Guide

IBM

Power

Ensure OS level is current

• Fix Central provides the latest updates for AIX, IBM i, VIOS, Linux, HMC and F/W. In addition to that, the FLRT tool provides

the recommended levels for each H/W model. Use these tools to maintain your system up to date. If you cannot move up to

the recommended level, then refer to the Known Issue section of the Hints & Tips for Migrating Workload to IBM POWER10

Processor-Based Systems document.

AIX CPU utilization

• On POWER10, the AIX OS system is optimized for best raw throughput at higher CPU usage when running with dedicated

processors. When running with shared processors, the AIX OS system is optimized to reduce CPU usage (pc). If the customer

requires to further reduce CPU usage (pc), use the schedo tunable vpm_throughput_mode to tune the workload and evaluate

the benefits of raw throughput vs. CPU usage.

NX GZIP

• To take advantage of NX GZIP acceleration on POWER10 systems the LPAR must be in POWER9 compatibility mode (not

POWER9_base mode) or POWER10 compatibility mode.

Power10 Quick Start Guide – AIX Best Practices