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I'm reviewing my HMC Profile "Desired Processor settings" when using Shared Processor Pool.
I had tweaked these years back on our P7, but I lost the specifics when migrating cores from P7 to P9.
The goal was to allow each LPAR use additional processor if and when needed, production weighted heavier.
Back on P7, this occurred periodically.
Since on P9, seldom.
I'm not sure how to set the "desired processor settings for both "Processing Units" and "Virtual processors".
I reread the help text, but still not clear on this.
Should I be using 1.5. 2.0 or 2.5?
Desired processing units
The number of processing units that you want the logical partition to use when you activate this partition profile. If the managed system has at least the desired number of processing units available when you activate this partition profile, then the managed system commits the desired number of processing units to the logical partition. If the desired number of processing units is not available, but at least the minimum number of processing units is available, then the managed system activates the logical partition with the processing units it has.
You can specify the number of processing units up to the tenth place. But the logical partition will report the processing units up to the hundredths place.
Any change you make on this page takes effect only after you shut down the logical partition and reactivate this partition profile.
Desired virtual processors
The desired number of virtual processors for the logical partition that is associated with this partition profile. The desired number of virtual processors is the number of virtual processors that you want to assign to this logical partition when you activate this partition profile.
When you activate this partition profile, the managed system calculates the ratio between the number of processing units committed to the logical partition and the desired number of virtual processors. If the calculated ratio is equal to or greater than the minimum processing units required for each virtual processor, then the logical partition is assigned the desired number of virtual processors. Otherwise, the number of virtual processors is the number of processing units divided by the minimum processing units required for each virtual processor, rounded down to the previous whole number. For example, a logical partition has 1.00 processing units committed to it, and the minimum processing units required for each virtual processor is 0.1. If the desired number of virtual processors is less than 10, then the managed system uses the desired number of virtual processors for this logical partition. Otherwise, the number of virtual processors for this logical partition is 10 (1.00 processing units divided by a minimum of 0.1 processing units for each virtual processor).
Any change you make on this page takes effect only after you shut down the logical partition and reactivate this partition profile.
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