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HP-UX Virtual Partitions Administrator’s Guide > Chapter 8 CPU, Memory, and I/O Resources (A.03.xx)

Memory: Allocation Concepts and Notes

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

  • 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. See the Installation and Update Guide for your OS and the nPartition Administrator’s Guide for your server.

  • Memory is allocated in multiples of 64 MB. Any specified size that is not a multiple of 64 MB is rounded up to the nearest 64 MB boundary. For example, if you specify 1 MB, 64 MB will be allocated.

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