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docs: expand the man page text for virsh setmaxmem

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Addresses BZ # 622534:

  https://bugzilla.redhat.com/show_bug.cgi?id=622534
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Justin Clift 2011-01-28 03:29:26 +11:00
parent a7483a5631
commit 4282efcc76
1 changed files with 13 additions and 3 deletions
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tools/virsh.pod
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@ -584,9 +584,19 @@ update the XML <currentMemory> element.
=item B<setmaxmem> I<domain-id> B<kilobytes>
Change the maximum memory allocation limit in the guest domain. This should
not change the current memory use. The memory limit is specified in
kilobytes.
Change the maximum memory allocation limit for an inactive guest domain.
This command works for at least the Xen and vSphere/ESX hypervisors,
but not for QEMU/KVM.
Some hypervisors require a larger granularity than kilobytes, rounding down
or rejecting requests that are not an even multiple of the desired amount.
vSphere/ESX is one of these, requiring the parameter to be evenly divisible
by 4MB. For vSphere/ESX, 263168 (257MB) would be rejected because it's not
a multiple of 4MB, while 266240 (260MB) is valid.
Note, to change the maximum memory allocation for a QEMU/KVM guest domain,
use the virsh B<edit> command instead to update its XML <memory> element.
=item B<memtune> I<domain-id> optional I<--hard-limit> B<kilobytes>
optional I<--soft-limit> B<kilobytes> optional I<--swap-hard-limit>