Thread: Centos : Load Average :OS Process Name : migration/1, migration/2 , migration/n
Centos : Load Average :OS Process Name : migration/1, migration/2 , migration/n
From
Perumal Raj
Date:
Hi All,
We have recently migrated postgres DB to out of of server ( Centos 6.9 ) .
Both Source and Target versions of OS/DB are same . Also Configuration is Apple-Apple.
But We started seeing lot of process name 'migration' at OS Level in new server which is triggering Load average most of the time .
Some sample process from top command,
67 root RT 0 0 0 0 R 34.8 0.0 913:06.38 [migration/16]
155 root RT 0 0 0 0 S 32.2 0.0 845:46.53 [migration/38]
35 root RT 0 0 0 0 S 27.6 0.0 927:15.27 [migration/8]
11 root RT 0 0 0 0 S 21.4 0.0 1033:45 [migration/2]
131 root RT 0 0 0 0 S 21.4 0.0 812:00.70 [migration/32]
87 root RT 0 0 0 0 S 20.7 0.0 394:28.32 [migration/21]
We have recently migrated postgres DB to out of of server ( Centos 6.9 ) .
Both Source and Target versions of OS/DB are same . Also Configuration is Apple-Apple.
But We started seeing lot of process name 'migration' at OS Level in new server which is triggering Load average most of the time .
Some sample process from top command,
67 root RT 0 0 0 0 R 34.8 0.0 913:06.38 [migration/16]
155 root RT 0 0 0 0 S 32.2 0.0 845:46.53 [migration/38]
35 root RT 0 0 0 0 S 27.6 0.0 927:15.27 [migration/8]
11 root RT 0 0 0 0 S 21.4 0.0 1033:45 [migration/2]
131 root RT 0 0 0 0 S 21.4 0.0 812:00.70 [migration/32]
87 root RT 0 0 0 0 S 20.7 0.0 394:28.32 [migration/21]
Anyone come-across this situation ? Please share your thoughts .
Thanks,
Raju
Re: Centos : Load Average :OS Process Name : migration/1, migration/2, migration/n
From
Adrian Klaver
Date:
On 5/22/19 2:18 PM, Perumal Raj wrote: > Hi All, > > We have recently migrated postgres DB to out of of server ( Centos 6.9 ) . > Both Source and Target versions of OS/DB are same . Also Configuration > is Apple-Apple. Other programs running that connect to the db server? More below. > > But We started seeing lot of process name 'migration' at OS Level in new > server which is triggering Load average most of the time . Going to need to determine what 'migration' is referring to? I would start by hitting 'c' in top to toggle full process name. > > Some sample process from top command, > > 67 root RT 0 0 0 0 R 34.8 0.0 913:06.38 > [migration/16] > 155 root RT 0 0 0 0 S 32.2 0.0 845:46.53 > [migration/38] > 35 root RT 0 0 0 0 S 27.6 0.0 927:15.27 > [migration/8] > 11 root RT 0 0 0 0 S 21.4 0.0 1033:45 > [migration/2] > 131 root RT 0 0 0 0 S 21.4 0.0 812:00.70 > [migration/32] > 87 root RT 0 0 0 0 S 20.7 0.0 394:28.32 > [migration/21] > > Anyone come-across this situation ? Please share your thoughts . > > Thanks, > Raju -- Adrian Klaver adrian.klaver@aklaver.com
Re: Centos : Load Average :OS Process Name : migration/1, migration/2, migration/n
From
Thomas Munro
Date:
On Thu, May 23, 2019 at 9:18 AM Perumal Raj <perucinci@gmail.com> wrote: > We have recently migrated postgres DB to out of of server ( Centos 6.9 ) . > Both Source and Target versions of OS/DB are same . Also Configuration is Apple-Apple. > > But We started seeing lot of process name 'migration' at OS Level in new server which is triggering Load average most ofthe time . > > Some sample process from top command, > > 67 root RT 0 0 0 0 R 34.8 0.0 913:06.38 [migration/16] > 155 root RT 0 0 0 0 S 32.2 0.0 845:46.53 [migration/38] > 35 root RT 0 0 0 0 S 27.6 0.0 927:15.27 [migration/8] > 11 root RT 0 0 0 0 S 21.4 0.0 1033:45 [migration/2] > 131 root RT 0 0 0 0 S 21.4 0.0 812:00.70 [migration/32] > 87 root RT 0 0 0 0 S 20.7 0.0 394:28.32 [migration/21] > > Anyone come-across this situation ? Please share your thoughts . I don't know anything about this, but I found a claim (without much real explanation) that Linux < 3.6.11 had some kind of problem in this area, could be relevant: https://serverfault.com/questions/674685/kernel-processes-periodically-eating-cpu-during-high-load https://bugs.gentoo.org/394487 https://bugzilla.kernel.org/show_bug.cgi?id=47341 -- Thomas Munro https://enterprisedb.com
Re: Centos : Load Average :OS Process Name : migration/1, migration/2, migration/n
From
Perumal Raj
Date:
Thanks for the responses,
Adrian,
top -c not showing much , Process name itself [ Migration/n]
Thomas,
Thanks for hitting same page, yes i came through it , But was wondering any one faced same issue in our community.
Regards,
Raju
On Wed, May 22, 2019 at 2:28 PM Thomas Munro <thomas.munro@gmail.com> wrote:
On Thu, May 23, 2019 at 9:18 AM Perumal Raj <perucinci@gmail.com> wrote:
> We have recently migrated postgres DB to out of of server ( Centos 6.9 ) .
> Both Source and Target versions of OS/DB are same . Also Configuration is Apple-Apple.
>
> But We started seeing lot of process name 'migration' at OS Level in new server which is triggering Load average most of the time .
>
> Some sample process from top command,
>
> 67 root RT 0 0 0 0 R 34.8 0.0 913:06.38 [migration/16]
> 155 root RT 0 0 0 0 S 32.2 0.0 845:46.53 [migration/38]
> 35 root RT 0 0 0 0 S 27.6 0.0 927:15.27 [migration/8]
> 11 root RT 0 0 0 0 S 21.4 0.0 1033:45 [migration/2]
> 131 root RT 0 0 0 0 S 21.4 0.0 812:00.70 [migration/32]
> 87 root RT 0 0 0 0 S 20.7 0.0 394:28.32 [migration/21]
>
> Anyone come-across this situation ? Please share your thoughts .
I don't know anything about this, but I found a claim (without much
real explanation) that Linux < 3.6.11 had some kind of problem in this
area, could be relevant:
https://serverfault.com/questions/674685/kernel-processes-periodically-eating-cpu-during-high-load
https://bugs.gentoo.org/394487
https://bugzilla.kernel.org/show_bug.cgi?id=47341
--
Thomas Munro
https://enterprisedb.com
On 5/22/19 4:18 PM, Perumal Raj wrote:
I googled "linux root migration" and found this:
https://serverfault.com/questions/674685/kernel-processes-periodically-eating-cpu-during-high-load
It has some pretty good answers.
Hi All,
We have recently migrated postgres DB to out of of server ( Centos 6.9 ) .
Both Source and Target versions of OS/DB are same . Also Configuration is Apple-Apple.
But We started seeing lot of process name 'migration' at OS Level in new server which is triggering Load average most of the time .
Some sample process from top command,
67 root RT 0 0 0 0 R 34.8 0.0 913:06.38 [migration/16]
155 root RT 0 0 0 0 S 32.2 0.0 845:46.53 [migration/38]
35 root RT 0 0 0 0 S 27.6 0.0 927:15.27 [migration/8]
11 root RT 0 0 0 0 S 21.4 0.0 1033:45 [migration/2]
131 root RT 0 0 0 0 S 21.4 0.0 812:00.70 [migration/32]
87 root RT 0 0 0 0 S 20.7 0.0 394:28.32 [migration/21]Anyone come-across this situation ? Please share your thoughts .
I googled "linux root migration" and found this:
https://serverfault.com/questions/674685/kernel-processes-periodically-eating-cpu-during-high-load
It has some pretty good answers.
--
Angular momentum makes the world go 'round.
Angular momentum makes the world go 'round.
Re: Centos : Load Average :OS Process Name : migration/1, migration/2, migration/n
From
Perumal Raj
Date:
Thanks for the update Ron,
Hopefully i will get some lead further on this issue, Will keep u posted.
On Wed, May 22, 2019 at 6:07 PM Ron <ronljohnsonjr@gmail.com> wrote:
On 5/22/19 4:18 PM, Perumal Raj wrote:Hi All,
We have recently migrated postgres DB to out of of server ( Centos 6.9 ) .
Both Source and Target versions of OS/DB are same . Also Configuration is Apple-Apple.
But We started seeing lot of process name 'migration' at OS Level in new server which is triggering Load average most of the time .
Some sample process from top command,
67 root RT 0 0 0 0 R 34.8 0.0 913:06.38 [migration/16]
155 root RT 0 0 0 0 S 32.2 0.0 845:46.53 [migration/38]
35 root RT 0 0 0 0 S 27.6 0.0 927:15.27 [migration/8]
11 root RT 0 0 0 0 S 21.4 0.0 1033:45 [migration/2]
131 root RT 0 0 0 0 S 21.4 0.0 812:00.70 [migration/32]
87 root RT 0 0 0 0 S 20.7 0.0 394:28.32 [migration/21]Anyone come-across this situation ? Please share your thoughts .
I googled "linux root migration" and found this:
https://serverfault.com/questions/674685/kernel-processes-periodically-eating-cpu-during-high-load
It has some pretty good answers.--
Angular momentum makes the world go 'round.