48

I see lots of those on my production server, they come and go and take up lots of CPU time

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
   17 root      RT   0     0    0    0 S 1661  0.0   4728:03 migration/3
   29 root      RT   0     0    0    0 S 1508  0.0   4728:03 migration/6
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55

The migration kernel process distributes workload across CPU cores. You should have one migration process per processor core.

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3

"migration" is a kernel process

Check here

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  • 12
    Down-voted for providing a link with no summary of what said process is. Up-voted the Answer which doesn't merely link, and actually explains the answer. – Jeff Welling Mar 27 '13 at 17:42
  • 1
    Upvoted to counter silly downvote. – Glenn Maynard Dec 19 '16 at 0:27
  • 5
    Downvoted to counter silly upvote. The link is just a link to someone's github account. Providing it with no summary is just begging for the explanation to get deleted and make the answer useless in the future. – William Everett Jan 9 '17 at 22:19
  • 1
    Down voted as not an answer, just a link. – ctrl-alt-delor Jan 9 '17 at 22:44

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