Installed Memory 32GB but shows only 16GB Post: 303023270

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Operating Systems AIX Installed Memory 32GB but shows only 16GB Post 303023270 by bakunin on Thursday 13th of September 2018 02:58:19 PM

09-13-2018

Registered User

Quote:

Originally Posted by filosophizer

but there is no profile for the whole VIOS machine, Virtual I/O Server
although it is very similar to HMC

This is why i asked you if you use a HMC - you don't, but use IVM instead.

The IVM screen says the total system memory is 16GB. Do you have all 32GB activated? IBM usually delivers its machines configured for CuOD (customer upgrade on demand) and you can use only a part of what is physically installed until you buy a license for the rest.

Did you check the error log? Maybe some memory/memory controller is broken and was deactivated by the system. Have you checked the ASMI?

I hope this helps.

bakunin

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LEARN ABOUT NETBSD

viomb

VIOMB(4)						   BSD Kernel Interfaces Manual 						  VIOMB(4)

NAME

     viomb -- VirtIO memory ballooning driver

SYNOPSIS

     virtio* at pci? dev ? function ?
     viomb*  at virtio?

DESCRIPTION

     virtio(4) defines an interface for efficient, standard, and extensible I/O between the hypervisor and the virtual machine.  The viomb driver
     supports the virtio-compliant memory ballooning device.

     Memory ballooning works as follows:

     1.   The host operator requests a guest to return some amount of memory to the host (via e.g. Qemu monitor balloon command).
     2.   The hypervisor sends the request via VirtIO memory ballooning device.
     3.   The guest viomb driver requests allocation of that amount of physical memory from the NetBSD memory management system.
     4.   The viomb device tells the hypervisor the guest physical memory address of the allocated memory via VirtIO memory ballooning device.

     The sysctl node hw.viomb.npages shows the requested number of memory pages to return to the hypervisor, while hw.viomb.actual shows the
     actual number of memory pages that are already returned to the hypervisor.

SEE ALSO

     virtio(4), sysctl(8)

     Rusty Russell, IBM Corporation, Virtio PCI Card Specification, http://ozlabs.org/~rusty/virtio-spec/.

HISTORY

     The viomb device driver appeared in NetBSD 6.0.

BUGS

     The userland interface should be same as the Xen ballooning device.

BSD
								 November 26, 2011							       BSD