Memory collection for VM issue when qemu-guest-agent is not installed

[MyungChi]

kvmtop can't collect memory of VM correctly.
as below, some of VMs are 0 for ram_total, ram_used.

Also, I want to know meaning of ram_vsize and ram_rss. Would U let me know it ?
Is there any workaround to get ram_total / ram_used ?

UUID    name    ram_total       ram_used        ram_vsize       ram_rss ram_minflt      ram_cminflt     ram_majflt      ram_cmajflt
e450c39e-68bf-4983-b82f-bfa09225025c    webserver-cho1-bfa09225025c     1786456 104288  2793398272      529088512       0       0       0       0
292c7b76-93c4-4cc7-879a-f7c0ba84ad7e    mepm    3880652 3759108 5093052416      4260282368      0       0       0       0
0f090e62-57b3-4c82-b75e-0bdfefe8fe98    vedge   3880620 126388  5053624320      3986751488      0       0       0       0
e3836de7-85de-469d-b2a2-23c6cdbf43a7    VM1-23c6cdbf43a7        0       0       1892118528      164352000       0       0       0       0
1268c760-0d2f-4433-94ea-9c6f981e7ef2    VM1-9c6f981e7ef2        0       0       1853149184      153837568       0       0       0       0
9a5f50a8-f22e-4376-830e-3eb88f6aa19e    VM1-3eb88f6aa19e        0       0       1892098048      154271744       0       0       0       0
4b628d5b-212d-4eca-ab61-213715fdf63d    oma     1015236 88128   1891819520      181854208       0       0       0       0
d53899e4-17d1-45c3-8404-ae28f5f7f3a4    server  1015408 185896  73912320        2920448 0       0       0       0
25ab8d9b-6f38-4e9a-8736-492e59e2263d    appPKG007-Com1-492e59e2263d     0       0       1361166336      175026176       0       0       0       0
aaac72f0-1fe8-4ddd-91c7-0004a02dd887    VM1-0004a02dd887        0       0       1876287488      188162048       0       0       0       0
675ad4b0-4c08-4e27-a841-c5f503f0a006    VM1-c5f503f0a006        0       0       1900519424      169979904       0       0       0       0
1624dcd0-a54b-4971-99bf-4b2fe4509949    appPKG007-Com2-4b2fe4509949     0       0       1324355584      143003648       0       0       0       0
dc878b79-4dd6-45b9-aef5-002a335ebde1    VM2-002a335ebde1        0       0       1891819520      181854208       0       0       0       0

58338920-bc48-4a8c-8612-381fcca30f0c    VM2-381fcca30f0c        0       0       1756024832      169889792       0       0       0       0

d53899e4-17d1-45c3-8404-ae28f5f7f3a4    server  1015408 185896  73912320        2920448 0       0       0       0
dc878b79-4dd6-45b9-aef5-002a335ebde1    VM2-002a335ebde1        0       0       1891819520      181854208       0       0       0       0
4b628d5b-212d-4eca-ab61-213715fdf63d    oma     1015236 88128   1891819520      181854208       0       0       0       0
9a5f50a8-f22e-4376-830e-3eb88f6aa19e    VM1-3eb88f6aa19e        0       0       1892098048      154271744       0       0       0       0
292c7b76-93c4-4cc7-879a-f7c0ba84ad7e    mepm    3880652 3759108 5093052416      4260282368      447     0       0       0
675ad4b0-4c08-4e27-a841-c5f503f0a006    VM1-c5f503f0a006        0       0       1900519424      169979904       0       0       0       0
e3836de7-85de-469d-b2a2-23c6cdbf43a7    VM1-23c6cdbf43a7        0       0       1892118528      164352000       0       0       0       0
25ab8d9b-6f38-4e9a-8736-492e59e2263d    appPKG007-Com1-492e59e2263d     0       0       1361166336      175026176       0       0       0       0
0f090e62-57b3-4c82-b75e-0bdfefe8fe98    vedge   3880620 126388  5053624320      3986751488      76      0       0       0
1268c760-0d2f-4433-94ea-9c6f981e7ef2    VM1-9c6f981e7ef2        0       0       1853149184      153837568       0       0       0       0
58338920-bc48-4a8c-8612-381fcca30f0c    VM2-381fcca30f0c        0       0       1756024832      169889792       0       0       0       0
aaac72f0-1fe8-4ddd-91c7-0004a02dd887    VM1-0004a02dd887        0       0       1876287488      188162048       20      0       0       0
e450c39e-68bf-4983-b82f-bfa09225025c    webserver-cho1-bfa09225025c     1786456 104288  2793398272      529088512       0       0       0       0
1624dcd0-a54b-4971-99bf-4b2fe4509949    appPKG007-Com2-4b2fe4509949     0       0       1324355584      143003648       413     0       0       0
292c7b76-93c4-4cc7-879a-f7c0ba84ad7e    mepm    3880652 3759108 5093052416      4260282368      162     0       0       0
aaac72f0-1fe8-4ddd-91c7-0004a02dd887    VM1-0004a02dd887        0       0       1876287488      188162048       24      0       0       0
675ad4b0-4c08-4e27-a841-c5f503f0a006    VM1-c5f503f0a006        0       0       1900519424      169979904       0       0       0       0
e450c39e-68bf-4983-b82f-bfa09225025c    webserver-cho1-bfa09225025c     1786456 104288  2793398272      529088512       0       0       0       0
d53899e4-17d1-45c3-8404-ae28f5f7f3a4    server  1015408 185896  73912320        2920448 0       0       0       0
9a5f50a8-f22e-4376-830e-3eb88f6aa19e    VM1-3eb88f6aa19e        0       0       1892098048      154271744       0       0       0       0
25ab8d9b-6f38-4e9a-8736-492e59e2263d    appPKG007-Com1-492e59e2263d     0       0       1361166336      175026176       0       0       0       0
4b628d5b-212d-4eca-ab61-213715fdf63d    oma     1015236 88128   1891819520      181854208       0       0       0       0
1268c760-0d2f-4433-94ea-9c6f981e7ef2    VM1-9c6f981e7ef2        0       0       1853149184      153837568       0       0       0       0
0f090e62-57b3-4c82-b75e-0bdfefe8fe98    vedge   3880620 126388  5053624320      3986751488      24      0       0       0
dc878b79-4dd6-45b9-aef5-002a335ebde1    VM2-002a335ebde1        0       0       1891819520      181854208       0       0       0       0
58338920-bc48-4a8c-8612-381fcca30f0c    VM2-381fcca30f0c        0       0       1756024832      169959424       75      0       0       0
e3836de7-85de-469d-b2a2-23c6cdbf43a7    VM1-23c6cdbf43a7        0       0       1892118528      164352000       0       0       0       0
1624dcd0-a54b-4971-99bf-4b2fe4509949    appPKG007-Com2-4b2fe4509949     0       0       1324355584      143003648       229     0       0       0
292c7b76-93c4-4cc7-879a-f7c0ba84ad7e    mepm    3880652 3759108 5093052416      4260282368      1096    0       0       0
1268c760-0d2f-4433-94ea-9c6f981e7ef2    VM1-9c6f981e7ef2        0       0       1853149184      153837568       0       0       0       0
58338920-bc48-4a8c-8612-381fcca30f0c    VM2-381fcca30f0c        0       0       1756024832      169959424       0       0       0       0
9a5f50a8-f22e-4376-830e-3eb88f6aa19e    VM1-3eb88f6aa19e        0       0       1892098048      154271744       0       0       0       0
e450c39e-68bf-4983-b82f-bfa09225025c    webserver-cho1-bfa09225025c     1786456 104288  2793398272      529088512       0       0       0       0
1624dcd0-a54b-4971-99bf-4b2fe4509949    appPKG007-Com2-4b2fe4509949     0       0       1324355584      143003648       0       0       0       0
dc878b79-4dd6-45b9-aef5-002a335ebde1    VM2-002a335ebde1        0       0       1891819520      181854208       0       0       0       0
4b628d5b-212d-4eca-ab61-213715fdf63d    oma     1015236 88128   1891819520      181854208       0       0       0       0
aaac72f0-1fe8-4ddd-91c7-0004a02dd887    VM1-0004a02dd887        0       0       1876287488      188162048       0       0       0       0
d53899e4-17d1-45c3-8404-ae28f5f7f3a4    server  1015408 185896  73912320        2920448 0       0       0       0
25ab8d9b-6f38-4e9a-8736-492e59e2263d    appPKG007-Com1-492e59e2263d     0       0       1361166336      175026176       0       0       0       0
675ad4b0-4c08-4e27-a841-c5f503f0a006    VM1-c5f503f0a006        0       0       1900519424      169979904       0       0       0       0
0f090e62-57b3-4c82-b75e-0bdfefe8fe98    vedge   3880620 126388  5053624320      3986751488      2       0       0       0
e3836de7-85de-469d-b2a2-23c6cdbf43a7    VM1-23c6cdbf43a7        0       0       1892118528      164352000       0       0       0       0
1268c760-0d2f-4433-94ea-9c6f981e7ef2    VM1-9c6f981e7ef2        0       0       1853149184      153837568       0       0       0       0
dc878b79-4dd6-45b9-aef5-002a335ebde1    VM2-002a335ebde1        0       0       1891819520      181854208       0       0       0       0
58338920-bc48-4a8c-8612-381fcca30f0c    VM2-381fcca30f0c        0       0       1756024832      169959424       6       0       0       0
25ab8d9b-6f38-4e9a-8736-492e59e2263d    appPKG007-Com1-492e59e2263d     0       0       1361166336      175026176       0       0       0       0
e450c39e-68bf-4983-b82f-bfa09225025c    webserver-cho1-bfa09225025c     1786456 104288  2793398272      529088512       0       0       0       0
292c7b76-93c4-4cc7-879a-f7c0ba84ad7e    mepm    3880652 3759108 5093052416      4260282368      20      0       0       0
0f090e62-57b3-4c82-b75e-0bdfefe8fe98    vedge   3880620 126388  5053624320      3986751488      0       0       0       0
d53899e4-17d1-45c3-8404-ae28f5f7f3a4    server  1015408 185896  73912320        2920448 0       0       0       0
4b628d5b-212d-4eca-ab61-213715fdf63d    oma     1015236 88128   1891819520      181854208       0       0       0       0
9a5f50a8-f22e-4376-830e-3eb88f6aa19e    VM1-3eb88f6aa19e        0       0       1892098048      154271744       0       0       0       0
e3836de7-85de-469d-b2a2-23c6cdbf43a7    VM1-23c6cdbf43a7        0       0       1892118528      164352000       0       0       0       0
1624dcd0-a54b-4971-99bf-4b2fe4509949    appPKG007-Com2-4b2fe4509949     0       0       1324355584      143003648       8       0       0       0
aaac72f0-1fe8-4ddd-91c7-0004a02dd887    VM1-0004a02dd887        0       0       1876287488      188162048       1       0       0       0
675ad4b0-4c08-4e27-a841-c5f503f0a006    VM1-c5f503f0a006        0       0       1900519424      169979904       0       0       0       0

[MyungChi]

Additionally, I checked one VM with cli.

$ virsh dumpxml VM2-381fcca30f0c
<domain type='kvm' id='433'>
  <name>VM2-381fcca30f0c</name>
  <uuid>58338920-bc48-4a8c-8612-381fcca30f0c</uuid>
  <memory unit='KiB'>1000448</memory>
  <currentMemory unit='KiB'>1000000</currentMemory>
  <vcpu placement='static'>1</vcpu>
  <resource>
    <partition>/machine</partition>
  </resource>
  <os>
    <type arch='x86_64' machine='pc-i440fx-rhel7.5.0'>hvm</type>
    <boot dev='hd'/>
  </os>
  <features>
    <acpi/>
    <apic/>
  </features>
  <cpu mode='custom' match='exact' check='full'>
    <model fallback='forbid'>IvyBridge-IBRS</model>
    <vendor>Intel</vendor>
    <feature policy='require' name='ss'/>
    <feature policy='require' name='pcid'/>
    <feature policy='require' name='hypervisor'/>
    <feature policy='require' name='arat'/>
    <feature policy='require' name='tsc_adjust'/>
    <feature policy='require' name='stibp'/>
    <feature policy='require' name='ssbd'/>
    <feature policy='require' name='xsaveopt'/>
    <feature policy='require' name='pdpe1gb'/>
  </cpu>
  <clock offset='utc'>
    <timer name='rtc' tickpolicy='catchup'/>
    <timer name='pit' tickpolicy='delay'/>
    <timer name='hpet' present='no'/>
  </clock>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot>
  <on_crash>destroy</on_crash>
  <devices>
    <emulator>/usr/libexec/qemu-kvm</emulator>
    <disk type='file' device='disk'>
      <driver name='qemu' type='qcow2'/>
      <source file='/opt/oma/images/58338920-bc48-4a8c-8612-381fcca30f0c/20181115165827489.img'/>
      <backingStore type='file' index='1'>
        <format type='raw'/>
        <source file='/opt/oma/images/_backing/COMPONEN-908e-41f6-ae97-2e241fb7406e/20181115165827489.img'/>
        <backingStore/>
      </backingStore>
      <target dev='vda' bus='virtio'/>
      <alias name='virtio-disk0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/>
    </disk>
    <disk type='file' device='cdrom'>
      <driver name='qemu' type='raw'/>
      <source file='/opt/oma/images/58338920-bc48-4a8c-8612-381fcca30f0c/cloudinit.iso'/>
      <backingStore/>
      <target dev='hda' bus='ide'/>
      <readonly/>
      <alias name='ide0-0-0'/>
      <address type='drive' controller='0' bus='0' target='0' unit='0'/>
    </disk>
    <controller type='usb' index='0' model='ich9-ehci1'>
      <alias name='usb'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x7'/>
    </controller>
    <controller type='usb' index='0' model='ich9-uhci1'>
      <alias name='usb'/>
      <master startport='0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0' multifunction='on'/>
    </controller>
    <controller type='usb' index='0' model='ich9-uhci2'>
      <alias name='usb'/>
      <master startport='2'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x1'/>
    </controller>
    <controller type='usb' index='0' model='ich9-uhci3'>
      <alias name='usb'/>
      <master startport='4'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x2'/>
    </controller>
    <controller type='pci' index='0' model='pci-root'>
      <alias name='pci.0'/>
    </controller>
    <controller type='ide' index='0'>
      <alias name='ide'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/>
    </controller>
    <controller type='virtio-serial' index='0'>
      <alias name='virtio-serial0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/>
    </controller>
    <interface type='bridge'>
      <mac address='52:54:00:fc:78:eb'/>
      <source network='private-net' bridge='private'/>
      <target dev='vnet28'/>
      <model type='virtio'/>
      <alias name='net0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
    </interface>
    <serial type='pty'>
      <source path='/dev/pts/25'/>
      <target type='isa-serial' port='0'>
        <model name='isa-serial'/>
      </target>
      <alias name='serial0'/>
    </serial>
    <console type='pty' tty='/dev/pts/25'>
      <source path='/dev/pts/25'/>
      <target type='serial' port='0'/>
      <alias name='serial0'/>
    </console>
    <input type='mouse' bus='ps2'>
      <alias name='input0'/>
    </input>
    <input type='keyboard' bus='ps2'>
      <alias name='input1'/>
    </input>
    <graphics type='spice' port='5915' autoport='yes' listen='127.0.0.1'>
      <listen type='address' address='127.0.0.1'/>
      <image compression='off'/>
    </graphics>
    <video>
      <model type='qxl' ram='65536' vram='65536' vgamem='16384' heads='1' primary='yes'/>
      <alias name='video0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
    </video>
    <memballoon model='virtio'>
      <alias name='balloon0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x0'/>
    </memballoon>
  </devices>
  <seclabel type='dynamic' model='dac' relabel='yes'>
    <label>+107:+107</label>
    <imagelabel>+107:+107</imagelabel>
  </seclabel>
</domain>

$ virsh dommemstat VM2-381fcca30f0c
actual 1000000
swap_in 0
last_update 1542616192
rss 166144

[MyungChi]

As my investigation, It is happen when qemu-guest-agent is not installed on VM.