3:05 a.m.
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What does /proc/meminfo says ?
Memory usage is a complex thing.
Le 10 ao=C3=BBt 2017 =C3=A0 23:23, Wesley Stewart =
<wstewart3(a)gmail.com> a =C3=A9crit :
=20
I am a little confused on why my CentOS box is using so much RAM. I =
currently
have a small test setup which only has 12GB of ram total.
=20
When I log into the administrative interface it tells me:
=20
Memory
=20
4.3
Available
of 15.5 GiB=20
Over commit: 39% (allocated 45%)
=20
11.1 GB Used
=20
Currently I am only running 3 VMs with memory allocations as follows:
=20
Defined Memory:
1024 MB
Physical Memory Guaranteed:
1024 MB
=20
Defined Memory:
3072 MB
Physical Memory Guaranteed:
3072 MB
=20
Defined Memory:
2048 MB
Physical Memory Guaranteed:
2048 MB
Or 6144MB used by VM
=20
If I SSH into my ovirt host, and run TOP and sort by memory, the top =
usage items
are:
31896 qemu 21.5% 727:21.44 qemu-kvm
6008 qemu 14.6% 190:33.70 qemu-kvm
3019 ovirt 13.6% 35:47.64 java
5800 qemu 8.5% 784:26.88 qemu-kvm
2565 ovirt 3.9% 62:58.00 java
=20
Everything else is pretty small compared, but for the OVIRT/QEMU we =
roughly get
Total: 62% =3D 7.45GB
=20
So I am a bit confused as to the Ram being reported to me by the =
system (15.5GGB,
but the system only has 12GB), and assuming OVIRT is =
using around 7-8GB, does a bare minimal install of CentOS really need =
4-5GB of Ram to run?
=20
This is a bare minimal install of CentOS7 running only Webmin and =
oVirt. I think
there are several things I don't understand here, and I =
am quite new to oVirt and would like to learn, so please excuse my =
inexperience if this is a silly question!
=20
Thanks either way, I am really happy I ditched my ESXi box :D
=20
=20
=20
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<html><head><meta http-equiv=3D"Content-Type"
content=3D"text/html =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" =
class=3D"">What does /proc/meminfo says ?<div
class=3D""><br =
class=3D""></div><div class=3D"">Memory usage is a
complex =
thing.</div><div class=3D""><br
class=3D""><div><blockquote type=3D"cite" =
class=3D""><div class=3D"">Le 10 ao=C3=BBt 2017 =C3=A0 23:23,
Wesley =
Stewart <<a href=3D"mailto:wstewart3@gmail.com" =
class=3D"">wstewart3(a)gmail.com</a>&gt; a =C3=A9crit
:</div><br =
class=3D"Apple-interchange-newline"><div class=3D""><div
dir=3D"ltr" =
class=3D"">I am a little confused on why my CentOS box is using so much =
RAM. I currently have a small test setup which only has <b =
class=3D"">12GB</b> of ram total.<div class=3D""><br
class=3D"">When I =
log into the administrative interface it tells me:</div><div =
class=3D""><br class=3D""></div><div
class=3D""><h3 =
style=3D"box-sizing:border-box;font-family:"Open =
Sans",Helvetica,Arial,sans-serif;line-height:1.1;color:rgb(54,54,54);=
margin-top:7px;margin-bottom:10px;font-size:16px" class=3D""><u =
class=3D"">Memory</u></h3><div
class=3D"gmail-current-values" =
style=3D"box-sizing:border-box;border-bottom:1px solid =
rgb(209,209,209);float:left;padding:0px 5px 10px =
0px;width:513.656px"><h1 class=3D"gmail-available-count
gmail-pull-left" =
style=3D"color:inherit;font-family:inherit;font-size:24px;box-sizing:borde=
r-box;margin:3px =
0px;font-weight:300;line-height:1.1;padding-left:0px;padding-right:5px;flo=
at:left">4.3</h1><div class=3D"gmail-pull-left
gmail-available-text" =
style=3D"color:rgb(51,51,51);font-family:"Open =
Sans",Helvetica,Arial,sans-serif;font-size:12px;box-sizing:border-box=
;line-height:14px;margin:2px 0px;padding:0px 5px;float:left"><div =
style=3D"box-sizing:border-box"
class=3D"">Available</div><div =
style=3D"box-sizing:border-box" class=3D"">of 15.5 =
GiB </div></div><div =
style=3D"color:rgb(54,54,54);font-family:"Open =
Sans",Helvetica,Arial,sans-serif;font-size:12px;box-sizing:border-box=
;clear:left;padding-top:5px" class=3D"">Over commit: 39% (allocated =
45%)<br class=3D""><br class=3D"">11.1 GB
Used</div><div =
style=3D"color:rgb(54,54,54);font-family:"Open =
Sans",Helvetica,Arial,sans-serif;font-size:12px;box-sizing:border-box=
;clear:left;padding-top:5px" class=3D""><br
class=3D""></div><div =
style=3D"color:rgb(54,54,54);font-family:"Open =
Sans",Helvetica,Arial,sans-serif;font-size:12px;box-sizing:border-box=
;clear:left;padding-top:5px" class=3D"">Currently I am only running 3 =
VMs with memory allocations as follows:</div><div =
style=3D"color:rgb(54,54,54);font-family:"Open =
Sans",Helvetica,Arial,sans-serif;font-size:12px;box-sizing:border-box=
;clear:left;padding-top:5px" class=3D""><br
class=3D""></div><div =
style=3D"box-sizing:border-box;clear:left;padding-top:5px"
class=3D""><div=
style=3D"box-sizing:border-box;clear:left;padding-top:5px" =
class=3D""><font color=3D"#363636" face=3D"Open Sans,
Helvetica, Arial, =
sans-serif" class=3D""><span style=3D"font-size:12px"
class=3D"">Defined =
Memory:</span></font></div><div =
style=3D"box-sizing:border-box;clear:left;padding-top:5px" =
class=3D""><font color=3D"#363636" face=3D"Open Sans,
Helvetica, Arial, =
sans-serif" class=3D""><span style=3D"font-size:12px"
class=3D"">1024 =
MB</span></font></div><div =
style=3D"box-sizing:border-box;clear:left;padding-top:5px" =
class=3D""><font color=3D"#363636" face=3D"Open Sans,
Helvetica, Arial, =
sans-serif" class=3D""><span style=3D"font-size:12px"
class=3D"">Physical =
Memory Guaranteed:</span></font></div><div =
style=3D"box-sizing:border-box;clear:left;padding-top:5px" =
class=3D""><font color=3D"#363636" face=3D"Open Sans,
Helvetica, Arial, =
sans-serif" class=3D""><span style=3D"font-size:12px"
class=3D"">1024 =
MB</span></font></div><div =
style=3D"box-sizing:border-box;clear:left;padding-top:5px" =
class=3D""><font color=3D"#363636" face=3D"Open Sans,
Helvetica, Arial, =
sans-serif" class=3D""><span style=3D"font-size:12px"
class=3D""><br =
class=3D""></span></font></div><div =
style=3D"box-sizing:border-box;clear:left;padding-top:5px" =
class=3D""><font color=3D"#363636" face=3D"Open Sans,
Helvetica, Arial, =
sans-serif" class=3D""><span style=3D"font-size:12px"
class=3D"">Defined =
Memory:</span></font></div><div =
style=3D"box-sizing:border-box;clear:left;padding-top:5px" =
class=3D""><font color=3D"#363636" face=3D"Open Sans,
Helvetica, Arial, =
sans-serif" class=3D""><span style=3D"font-size:12px"
class=3D"">3072 =
MB</span></font></div><div =
style=3D"box-sizing:border-box;clear:left;padding-top:5px" =
class=3D""><font color=3D"#363636" face=3D"Open Sans,
Helvetica, Arial, =
sans-serif" class=3D""><span style=3D"font-size:12px"
class=3D"">Physical =
Memory Guaranteed:</span></font></div><div =
style=3D"box-sizing:border-box;clear:left;padding-top:5px" =
class=3D""><font color=3D"#363636" face=3D"Open Sans,
Helvetica, Arial, =
sans-serif" class=3D""><span style=3D"font-size:12px"
class=3D"">3072 =
MB</span></font></div><div =
style=3D"box-sizing:border-box;clear:left;padding-top:5px" =
class=3D""><font color=3D"#363636" face=3D"Open Sans,
Helvetica, Arial, =
sans-serif" class=3D""><span style=3D"font-size:12px"
class=3D""><br =
class=3D""></span></font></div><div =
style=3D"box-sizing:border-box;clear:left;padding-top:5px" =
class=3D""><font color=3D"#363636" face=3D"Open Sans,
Helvetica, Arial, =
sans-serif" class=3D""><span style=3D"font-size:12px"
class=3D"">Defined =
Memory:</span></font></div><div =
style=3D"box-sizing:border-box;clear:left;padding-top:5px" =
class=3D""><font color=3D"#363636" face=3D"Open Sans,
Helvetica, Arial, =
sans-serif" class=3D""><span style=3D"font-size:12px"
class=3D"">2048 =
MB</span></font></div><div =
style=3D"box-sizing:border-box;clear:left;padding-top:5px" =
class=3D""><font color=3D"#363636" face=3D"Open Sans,
Helvetica, Arial, =
sans-serif" class=3D""><span style=3D"font-size:12px"
class=3D"">Physical =
Memory Guaranteed:</span></font></div><div =
style=3D"box-sizing:border-box;clear:left;padding-top:5px" =
class=3D""><font color=3D"#363636" face=3D"Open Sans,
Helvetica, Arial, =
sans-serif" class=3D""><span style=3D"font-size:12px"
class=3D"">2048 =
MB</span></font></div><div =
style=3D"box-sizing:border-box;clear:left;padding-top:5px" =
class=3D""><font color=3D"#363636" face=3D"Open Sans,
Helvetica, Arial, =
sans-serif" class=3D""><span style=3D"font-size:12px"
class=3D""><b =
class=3D"">Or 6144MB used by
VM</b></span></font></div><div =
style=3D"box-sizing:border-box;clear:left;padding-top:5px" =
class=3D""><font color=3D"#363636" face=3D"Open Sans,
Helvetica, Arial, =
sans-serif" class=3D""><span style=3D"font-size:12px"
class=3D""><br =
class=3D""></span></font></div><div =
style=3D"box-sizing:border-box;clear:left;padding-top:5px" =
class=3D""><font color=3D"#363636" face=3D"Open Sans,
Helvetica, Arial, =
sans-serif" class=3D""><span style=3D"font-size:12px"
class=3D"">If I =
SSH into my ovirt host, and run TOP and sort by memory, the top usage =
items are:</span></font></div><div =
style=3D"box-sizing:border-box;clear:left;padding-top:5px" =
class=3D""><font color=3D"#363636" face=3D"Open Sans,
Helvetica, Arial, =
sans-serif" class=3D""><div =
style=3D"font-size:12px;box-sizing:border-box;clear:left;padding-top:5px" =
class=3D"">31896 qemu <b
class=3D"">21.5%</b> =
727:21.44 qemu-kvm</div><div =
style=3D"font-size:12px;box-sizing:border-box;clear:left;padding-top:5px" =
class=3D""> 6008 qemu
<b =
class=3D"">14.6%</b> 190:33.70 qemu-kvm</div><div =
style=3D"font-size:12px;box-sizing:border-box;clear:left;padding-top:5px" =
class=3D""> 3019 ovirt
<b =
class=3D"">13.6%</b> 35:47.64 java</div><div =
style=3D"font-size:12px;box-sizing:border-box;clear:left;padding-top:5px" =
class=3D""> 5800 qemu
<b =
class=3D"">8.5%</b> 784:26.88 qemu-kvm</div><div =
style=3D"font-size:12px;box-sizing:border-box;clear:left;padding-top:5px" =
class=3D""> 2565 ovirt
<b =
class=3D"">3.9%</b> 62:58.00 java</div><div =
style=3D"font-size:12px;box-sizing:border-box;clear:left;padding-top:5px" =
class=3D""><br class=3D""></div><div =
style=3D"font-size:12px;box-sizing:border-box;clear:left;padding-top:5px" =
class=3D"">Everything else is pretty small compared, but for the =
OVIRT/QEMU we roughly get<br class=3D""></div><div =
style=3D"font-size:12px;box-sizing:border-box;clear:left;padding-top:5px" =
class=3D""><b class=3D"">Total: 62% =3D 7.45GB<br
class=3D""><br =
class=3D""></b></div><div =
style=3D"font-size:12px;box-sizing:border-box;clear:left;padding-top:5px" =
class=3D"">So I am a bit confused as to the Ram being reported to me by =
the system (15.5GGB, but the system only has 12GB), and assuming OVIRT =
is using around 7-8GB, does a bare minimal install of CentOS really need =
4-5GB of Ram to run?</div><div =
style=3D"font-size:12px;box-sizing:border-box;clear:left;padding-top:5px" =
class=3D""><br class=3D""></div><div =
style=3D"font-size:12px;box-sizing:border-box;clear:left;padding-top:5px" =
class=3D"">This is a bare minimal install of CentOS7 running only Webmin =
and oVirt. I think there are several things I don't understand =
here, and I am quite new to oVirt and would like to learn, so please =
excuse my inexperience if this is a silly question!</div><div =
style=3D"font-size:12px;box-sizing:border-box;clear:left;padding-top:5px" =
class=3D""><br class=3D""></div><div =
style=3D"font-size:12px;box-sizing:border-box;clear:left;padding-top:5px" =
class=3D"">Thanks either way, I am really happy I ditched my ESXi box =
:D</div><div =
style=3D"font-size:12px;box-sizing:border-box;clear:left;padding-top:5px" =
class=3D""><b class=3D""><br
class=3D""></b></div><div =
style=3D"font-size:12px;box-sizing:border-box;clear:left;padding-top:5px" =
class=3D""><b class=3D""><br
class=3D""></b></div></font></div></div><div
=
style=3D"color:rgb(54,54,54);font-family:"Open =
Sans",Helvetica,Arial,sans-serif;font-size:12px;box-sizing:border-box=
;clear:left;padding-top:5px" class=3D""><br =
class=3D""></div></div></div></div>
_______________________________________________<br class=3D"">Users =
mailing list<br class=3D""><a href=3D"mailto:Users@ovirt.org"
=
class=3D"">Users(a)ovirt.org</a><br =
class=3D"">http://lists.ovirt.org/mailman/listinfo/users<br =
class=3D""></div></blockquote></div><br
class=3D""></div></body></html>=
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