seniorRuby on Rails
What is Rails memory management and garbage collection behavior?
Updated May 24, 2026
Short answer
Rails relies on Ruby's garbage collector to manage memory automatically.
Deep explanation
Ruby uses generational garbage collection. Rails applications can suffer memory bloat due to object retention, large ActiveRecord relations, and middleware stacks. Optimizing memory involves reducing allocations, using find_each, and avoiding long-lived objects.
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