Optimizing Garbage Collection in Rails with Autotuner

03-Jan-2026 519
Autotuner is a tool designed to optimize the performance of Ruby on Rails applications by fine-tuning the garbage collector (GC). It integrates seamlessly with Rails as middleware and collects data on GC activity between requests. Based on this data, Autotuner offers actionable suggestions to help reduce GC overhead, improving the bootup time, warmup, and overall response times of your application. How Does Autotuner Work? Autotuner tracks garbage collection events in your Rails application and analyzes these events to make intelligent suggestions on how to adjust the GC settings. The gem provides insights into: GC performance: How much time is spent on GC during requests. Major vs Minor GC: The number of major and minor garbage collection cycles. Heap size: How much memory is used by your application. Request times: The duration of requests, allowing Autotuner to correlate GC performance with app response times.
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