Configuring and Migrating Memory on vPars
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difference is 9 MB. This difference can be more on some systems or platforms. The following lists
some of the reasons why the difference can be more:
• When the amount of memory each cell contributes to interleaving is not uniform, some
amount of memory is lost during interleaving. For example, on a 3 cell system where one cell
contributes 0.5 GB, a second cell contributes 1 GB, and the third cell contributes 2 GB, some
amount of memory will not be available after interleaving. The exact amount that will not be
available depends on how non-uniform the contribution from each cell is.
• The memory reported by vparstatus –v and vparstatus –A is aligned on the megabyte
boundary. Hence, if there are memory holes of few kilobytes, they are reported as a
megabyte hole in the output. This might exacerbate the difference during memory accounting
if there are a significant number of double bit error memory pages on HP Integrity servers, as
such pages are shown as memory holes. However, the actual usable memory, except for the
memory holes of a few kilobytes, is still available and used by each OS instance in the
partition.