The other answers are correct. Here is some code you…

Question

Asked: May 13, 20262026-05-13T19:30:23+00:00 2026-05-13T19:30:23+00:00

I have a simple rake task which consumes pretty much data via ActiveRecord. (contacts

I have a simple rake task which consumes pretty much data via ActiveRecord. (contacts has ~47k rows)

Contact.all.each do |contact|
  contact.update_attribute ...
end

When I run that task ~400 rows get updated and then the task stucks. No errors and no database activity at all…

How do I make this work properly?

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Editorial Team · Answer 1 · 2026-05-13T19:30:23+00:00

Editorial Team

This is exactly what find_in_batches is intended for. It will eliminate an enormous number of ActiveRecord objects in memory at once.