Ruby on Rails memory leak when looping through large number of records; find_each doesn't help

Question

I have a Rails app that processes a large (millions) number of records in a mysql database. Once it starts working, its memory use quickly grows at a speed of 50MB per secon

Answer 1

As nice as ActiveRecord is, it is not the best tool for all problems. I recommend dropping down to your native database adapter and doing the work at that level.