June 2007
Intermediate to advanced
86 pages
2h 13m
English
book
Automatic Partition Resource Manager for System i and iSeries
by Nick Harris, Dave Schnee, Peter Mullin
Content preview from Automatic Partition Resource Manager for System i and iSeries
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Chapter 6. Automatic LPAR tuning with APRM 45
content saved to disk, and then moved to the base pool from which the LPAR
hypervisor can take it.
Even with caching disk controllers, it can still take several minutes to empty a
significant block (gigabytes) of memory. While memory is removed from a
partition, you cannot make any other adjustments at all. During this time, the
page fault rates in the partition that is losing the memory can be greater than the
production workload otherwise causes. Also, this action usually requires a
reallocation of the remaining memory among the shared pools to maintain
reasonable performance in the partition. Moreover, when the memory is then
added to another partition, it is given to the base pool there. P ...
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