[ovirt-users] High CPU Usage caused by migration thread on Node

Wednesday, 21 September 2016

--_000_VI1PR0202MB26231F45F0EAA086C44779BE86F60VI1PR0202MB2623_
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: quoted-printable

Hi,

We've got a problem with a critical machine which running Oracle Database a=
nd if someone can help us it would be very nice.

Our VM is running rhel 6.5 and is configuring with 16 cores (2 virtual sock=
et with 8 virtual cores) and 240Gb.

This virtual machine is running perfectly on the first host R620 : two cpu =
E5-2695 v2 - 12 cores on each cpu -  and 384Gb of memory.

We wan't to move this virtual machine on a new server, Transtec with two  E=
5-2650 v3 - 10 cores on each cpu - and 256Gb of memory. We have encountered=
 high cpu usage on this host.

Both servers are running centOS 7.2 and ovirt 3.6. We have already identifi=
ed that on the node, many < migrate/N > are causing high cpu usage.

We have tried few options :

-       Pass-Through Host CPU

-       Configure NUMA : numa node count =3D 2, numa pinning
The first day the machine was running, everything is ok and migrate threads=
 disapeared, but on the second day, high cpu and migration thread were back=
. Oracle services are being restarted everyday for cold backup but not the =
virtual machines.

I don't know if looking in the Numa options is a good idea and I don't why =
the everything is running ok on the R620 (perhaps the available memory)

Thank you for your advices.

Styve

--_000_VI1PR0202MB26231F45F0EAA086C44779BE86F60VI1PR0202MB2623_
Content-Type: text/html; charset="us-ascii"
Content-Transfer-Encoding: quoted-printable

<html xmlns:v=3D"urn:schemas-microsoft-com:vml"
xmlns:o=3D"urn:schemas-micr=
osoft-com:office:office" xmlns:w=3D"urn:schemas-microsoft-com:office:word"
=
xmlns:m=3D"http://schemas.microsoft.com/office/2004/12/omml"
xmlns=3D"http:=
//www.w3.org/TR/REC-html40"...

<head...
 <meta http-equiv=3D"Content-Type"
content=3D"text/html; charset=3Dus-ascii"=
...
 <meta name=3D"Generator" content=3D"Microsoft
Word 15 (filtered medium)"...
 <style><!--
/* Font Definitions */
@font-face
	{font-family:Wingdings;
	panose-1:5 0 0 0 0 0 0 0 0 0;}
@font-face
	{font-family:"Cambria Math";
	panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
	{font-family:Calibri;
	panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
	{margin:0cm;
	margin-bottom:.0001pt;
	font-size:11.0pt;
	font-family:"Calibri",sans-serif;
	mso-fareast-language:EN-US;}
a:link, span.MsoHyperlink
	{mso-style-priority:99;
	color:#0563C1;
	text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
	{mso-style-priority:99;
	color:#954F72;
	text-decoration:underline;}
p.MsoListParagraph, li.MsoListParagraph, div.MsoListParagraph
	{mso-style-priority:34;
	margin-top:0cm;
	margin-right:0cm;
	margin-bottom:0cm;
	margin-left:36.0pt;
	margin-bottom:.0001pt;
	font-size:11.0pt;
	font-family:"Calibri",sans-serif;
	mso-fareast-language:EN-US;}
span.EmailStyle17
	{mso-style-type:personal-compose;
	font-family:"Arial",sans-serif;
	color:black;
	font-weight:normal;
	font-style:normal;
	text-decoration:none none;}
.MsoChpDefault
	{mso-style-type:export-only;
	font-family:"Calibri",sans-serif;
	mso-fareast-language:EN-US;}
@page WordSection1
	{size:612.0pt 792.0pt;
	margin:70.85pt 70.85pt 70.85pt 70.85pt;}
div.WordSection1
	{page:WordSection1;}
/* List Definitions */
@list l0
	{mso-list-id:673383137;
	mso-list-type:hybrid;
	mso-list-template-ids:-156202968 1185027074 67895299 67895301 67895297 678=
95299 67895301 67895297 67895299 67895301;}
@list l0:level1
	{mso-level-start-at:19;
	mso-level-number-format:bullet;
	mso-level-text:-;
	mso-level-tab-stop:none;
	mso-level-number-position:left;
	text-indent:-18.0pt;
	font-family:"Arial",sans-serif;
	mso-fareast-font-family:Calibri;}
@list l0:level2
	{mso-level-number-format:bullet;
	mso-level-text:o;
	mso-level-tab-stop:none;
	mso-level-number-position:left;
	text-indent:-18.0pt;
	font-family:"Courier New";}
@list l0:level3
	{mso-level-number-format:bullet;
	mso-level-text:\F0A7;
	mso-level-tab-stop:none;
	mso-level-number-position:left;
	text-indent:-18.0pt;
	font-family:Wingdings;}
@list l0:level4
	{mso-level-number-format:bullet;
	mso-level-text:\F0B7;
	mso-level-tab-stop:none;
	mso-level-number-position:left;
	text-indent:-18.0pt;
	font-family:Symbol;}
@list l0:level5
	{mso-level-number-format:bullet;
	mso-level-text:o;
	mso-level-tab-stop:none;
	mso-level-number-position:left;
	text-indent:-18.0pt;
	font-family:"Courier New";}
@list l0:level6
	{mso-level-number-format:bullet;
	mso-level-text:\F0A7;
	mso-level-tab-stop:none;
	mso-level-number-position:left;
	text-indent:-18.0pt;
	font-family:Wingdings;}
@list l0:level7
	{mso-level-number-format:bullet;
	mso-level-text:\F0B7;
	mso-level-tab-stop:none;
	mso-level-number-position:left;
	text-indent:-18.0pt;
	font-family:Symbol;}
@list l0:level8
	{mso-level-number-format:bullet;
	mso-level-text:o;
	mso-level-tab-stop:none;
	mso-level-number-position:left;
	text-indent:-18.0pt;
	font-family:"Courier New";}
@list l0:level9
	{mso-level-number-format:bullet;
	mso-level-text:\F0A7;
	mso-level-tab-stop:none;
	mso-level-number-position:left;
	text-indent:-18.0pt;
	font-family:Wingdings;}
ol
	{margin-bottom:0cm;}
ul
	{margin-bottom:0cm;}
--></style><!--[if gte mso 9]><xml...

<o:shapedefaults v:ext=3D"edit" spidmax=3D"1026" /...
 </xml><![endif]--><!--[if gte mso
9]><xml...
 <o:shapelayout
v:ext=3D"edit"...
 <o:idmap v:ext=3D"edit"
data=3D"1" /...

</o:shapelayout></xml><![endif]--...

</head...
 <body lang=3D"FR"
link=3D"#0563C1" vlink=3D"#954F72"...
 <div
class=3D"WordSection1"...
 Hi,<o:p></o:p></p...
 <o:p>&nbsp;</o:p></p...
 We&#8217;ve got a problem with a
critical=
 machine which running Oracle Database and if someone can help us it would =
be very nice.<o:p></o:p></p...
 <o:p>&nbsp;</o:p></p...
 Our VM is running rhel 6.5 and is configu=
ring with 16 cores (2 virtual socket with 8 virtual cores) and 240Gb.
<o:p></o:p></p...
 <o:p>&nbsp;</o:p></p...
 This virtual machine is running perfectly=
 on the first host R620&nbsp;: two cpu E5-2695 v2 - 12 cores on each cpu - =
&nbsp;and 384Gb of memory.<o:p></o:p></p...
 <o:p>&nbsp;</o:p></p...
 We wan&#8217;t to move this virtual
machi=
ne on a new server, Transtec with two &nbsp;E5-2650 v3 &#8211; 10 cores on =
each cpu &#8211; and 256Gb of memory. We have encountered high cpu usage
 on this host.<o:p></o:p></p...
 <o:p>&nbsp;</o:p></p...
 Both servers are running centOS 7.2 and o=
virt 3.6. We have already identified that on the node, many &laquo;&nbsp;mi=
grate/N&nbsp;&raquo; are causing high cpu
usage.<o:p></o:p></p...
 <o:p>&nbsp;</o:p></p...
 We have tried few options&nbsp;:
<o:p></o:p></p...
 <![if !supportLists]>-<=
span style=3D"font:7.0pt &quot;Times New
Roman&quot;">&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;
<![endif]>Pass-Through Host
CPU<o:p></o:p><=
/span></p...
 <![if !supportLists]>-<=
span style=3D"font:7.0pt &quot;Times New
Roman&quot;">&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;
<![endif]>Configure NUMA&nbsp;: numa
node c=
ount =3D 2, numa pinning
<o:p></o:p></p...
 The first day the machine was running, ev=
erything is ok and migrate threads disapeared, but on the second day, high =
cpu and migration thread were back. Oracle services
 are being restarted everyday for cold backup but not the virtual machines.=
<o:p></o:p></p...
 <o:p>&nbsp;</o:p></p...
 I don&#8217;t know if looking in the
Numa=
 options is a good idea and I don&#8217;t why the everything is running ok =
on the R620 (perhaps the available memory)<o:p></o:p></p...
 <o:p>&nbsp;</o:p></p...
 Thank you for your
advices.<o:p></o:p></s=
pan></p...
 <o:p>&nbsp;</o:p></p...
 Styve<o:p></o:p></p...
 <o:p>&nbsp;</o:p></p...
 <o:p>&nbsp;</o:p></p...

</div...

</body...

</html...

--_000_VI1PR0202MB26231F45F0EAA086C44779BE86F60VI1PR0202MB2623_--

2025

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

[ovirt-users] High CPU Usage caused by migration thread on Node