December 2011
Intermediate to advanced
426 pages
13h 30m
English
book
Power Systems Enterprise Servers with PowerVM Virtualization and RAS
by Dino Quintero, JinHoon Baek, Guillermo Diez, Hassan Elsetohy, Debra Francis, Bing He, Rajesh Jeyapaul, Anil Kalavakolanu, Tejaswini Kaujalgi, David Kgabo, Ricardo Puig, Vani Ramagiri
Content preview from Power Systems Enterprise Servers with PowerVM Virtualization and RAS
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Chapter 7. POWER7 Enterprise Server performance considerations 277
– Where possible, set the partition’s entitled processing units as close to the anticipated
CPU processing requirements as possible. The more CPU that processing partitions
use as uncapped (for example, beyond their entitlement), the greater the processor
efficiency effects that are caused by increased virtual processor switching.
– When attempting to take advantage of unused shared pool resources, set the number
of virtual processors close to the expected capacity that you are trying to achieve for
that partition.
Setting virtual processors to higher values usually results in reduced processor efficiency
and can result in decreased performance from increased contention.
F
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.