User Guide

IBM

Power

Power10 Quick-start Guide – IBM i Performance Tips

IBM i

Ensure the IBM i operating system level is current. Fix Central provides the latest updates

for IBM i, VIOS, HMC and firmware.

https://www.ibm.com/support/fixcentral/

Firmware

Ensure the system firmware level is current. Fix Central provides the latest updates for

IBM i, VIOS, HMC and firmware.

https://www.ibm.com/support/fixcentral/

Virtual Processors – shared vs dedicated processors

Utilize dedicated processors

for optimal partition level

performance.

More comprehensive information

Refer to link: IBM i on Power - Performance FAQ

https://www.ibm.com/downloads/cas/QWXA9XKN

Memory DIMMs

Follow proper memory plug-in rules. If possible, fully populate memory DIMM slots and

utilize similar sized memory DIMMs.

Processor SMT level

To take full advantage of the performance of Power10 CPUs, we recommend clients

utilize the IBM i default processor multitasking settings, which will maximize the SMT

level for the LPAR configuration.

Partition Placement

Current FW levels ensure optimal placement of the partitions. However, if frequent

DLPAR operations are executed on partitions on the CEC, it is recommended the use DPO

to optimize placement.

EnergyScale

For the best CPU processor speed, ensure that Maximum

Performance is set (default for IBM Power E1080). This setting is

configurable in the ASMI.

Storage and Networking I/O

VIOS provides flexible storage and networking functionality. For the

best possible performance, utilize native IBM i interfaces for I/O.