On Thu, May 23, 2019 at 9:18 AM Perumal Raj <perucinci@xxxxxxxxx> 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
