Sun Microsystems VIRTUALBOX 3.0.0 - Manual (Page 154)

11 Troubleshooting
a weird error message such as “failed to mount the root partition”), then you have
probably run into a memory conflict of your kernel and initial RAM disk. This can be
solved by adding the following parameter to your GRUB configuration:
uppermem 524288
11.6 Solaris hosts
11.6.1 Cannot start VM, not enough contiguous memory
The ZFS file system is known to use all available RAM as cache if the default system
settings are not changed. This may lead to a heavy fragmentation of the host memory
preventing VirtualBox VMs from being started. We recommend to limit the ZFS cache
by adding a line
set zfs:zfs_arc_max = xxxx
to /etc/system where xxxx bytes is the amount of memory usable for the ZFS cache.
11.6.2 VM aborts with out of memory errors on Solaris 10 hosts
Solaris 10 hosts (bug 1225025) requires swap space equal to, or greater than the host’s
physical memory size. For example, 8 GB physical memory would require at least 8 GB
swap. This can be configured during a Solaris 10 install by choosing a ’custom install’
and changing the default partitions.
For existing Solaris 10 installs, an additional swap image needs to be mounted and
used as swap. Hence if you have 1 GB swap and 8 GB of physical memory, you require
to add 7 GB more swap. This can be done as follows:
For ZFS (as root user):
zfs create -V 8gb /_<ZFS volume>_/swap
swap -a /dev/zvol/dsk/_<ZFS volume>_/swap
To mount if after reboot, add the following line to /etc/vfstab:
/dev/zvol/dsk/_<ZFS volume>_/swap - - swap - no -
For UFS (as root user):
mkfile 7g /path/to/swapfile.img
swap -a /path/to/swapfile.img
To mount it after reboot, add the following line to /etc/vfstab:
/path/to/swap.img - - swap - no -
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