17.4.


17.4.1. 

重要

17.4.2. 

    1. # virsh dumpxml testguest | grep memballoon
      <memballoon model='virtio'>
          </memballoon>
      Copy to Clipboard Toggle word wrap

  1. # virsh dominfo testguest
    Max memory:     2097152 KiB
    Used memory:    2097152 KiB
    Copy to Clipboard Toggle word wrap

17.4.3. 

    1. # virsh dumpxml testguest | grep memballoon
      <memballoon model='virtio'>
          </memballoon>
      Copy to Clipboard Toggle word wrap

  1. # virsh dominfo testguest
    Max memory:     2097152 KiB
    Used memory:    2097152 KiB
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  2. # virt-xml testguest --edit --memory memory=4096,currentMemory=4096
    Domain 'testguest' defined successfully.
    Changes will take effect after the domain is fully powered off.
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    警告

  3. # virsh setmem testguest --current 2048
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  1. # virsh dominfo testguest
    Max memory:     4194304 KiB
    Used memory:    2097152 KiB
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  2.  # virsh domstats --balloon testguest
    Domain: 'testguest'
      balloon.current=365624
      balloon.maximum=4194304
      balloon.swap_in=0
      balloon.swap_out=0
      balloon.major_fault=306
      balloon.minor_fault=156117
      balloon.unused=3834448
      balloon.available=4035008
      balloon.usable=3746340
      balloon.last-update=1587971682
      balloon.disk_caches=75444
      balloon.hugetlb_pgalloc=0
      balloon.hugetlb_pgfail=0
      balloon.rss=1005456
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17.4.4. 

  1. # virsh edit testguest
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  2. <memoryBacking>
      <hugepages>
        <page size='1' unit='GiB'/>
      </hugepages>
    </memoryBacking>
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  1. # cat /proc/meminfo | grep Huge
    
    HugePages_Total:    4
    HugePages_Free:     2
    HugePages_Rsvd:     1
    Hugepagesize:       1024000 kB
    Copy to Clipboard Toggle word wrap

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