Installing and Managing HP-UX Virtual Partitions (A.01.01)

Calculating the Size of Kernels in Memory
Examples of Using the Calculations
Appendix C 129
Examples of Using the Calculations
Changing Dynamic Tunables
If you have already migrated to a vPars computer and are adjusting the
dynamic tunables of a kernel, check that there is an available memory
range under the 2 GB boundary to accommodate the adjusted kernel.
You should do this check after adjusting the dynamic tunables but before
rebooting the partition.
For example, suppose you calculated the size of an adjusted kernel to be
64 MB. Using vparstatus -A, you can check whether there is an
available memory range below the 2 GB limit to accommodate the kernel
size:
# vparstatus -A
...
[Unbound memory (Base /Range)]: 0x40000000/256
(bytes) (MB)
The output from vparstatus -A shows the following:
• an available 256 MB memory range that can accommodatethe 64 MB
kernel and
• an available memory range beginning at0x40000000, which is below
the 2 GB limit.
Therefore, the criteria will continue to be met after you reboot the
partition.
Migrating OSs from non-vPars Computers to a vPars
Computer
If you are migrating from multiple non-vPars computers to one vPars
computer, sum up the results for all the kernels and ensure that the
result is under 2 GB.
1
For example, if we calculated the size of the kernel of the first OS to be 64
MB and the second OS to be 128 MB, the sum is 192 MB. 192 MB is
1. Because the monitor uses 64 MB, the actual number is 1984 MB.