Re: Centos : Load Average :OS Process Name : migration/1, migration/2 , migration/n

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(dot)munro(at)gmail(dot)com> wrote:

> On Thu, May 23, 2019 at 9:18 AM Perumal Raj <perucinci(at)gmail(dot)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
>