HP-UX Virtual Partitions Administrator's Guide (includes A.05.02)

CPU, Memory, and I/O Resources (A.04.xx)

Memory: Allocation Notes

Chapter 7

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Memory: Allocation Notes

• The default memory assigned to a virtual partition is 0 MB, so you need to specify enough memory for

your applications and the operating system. While there is no speciﬁc minimum base memory

requirement per vpar, the HPUX kernel does require a certain amount of base memory to boot

successfully. For this reason, we currently recommend that 1 GB of base memory is assigned per vpar.

The more base memory a virtual partition has, the better the performance will be. This is especially true

of applications that require large amounts of locked memory. Please see the Install and Upgrade Guide

for your OS and the nPartition Administrator’s Guide for your server.

• The unit for the speciﬁed size of memory for the vPars commands is megabytes; parmodify uses

gigabytes.

• Memory is allocated in multiples of 128 MB by default. Memory assignments are also rounded up (to the

next highest granule boundary).