Unicorn Eating Memory

Question

I have a m1.small instance in amazon with 8GB hard disk space on which my rails application runs. It runs smoothly for 2 weeks and after that it crashes saying the memory is ful

Answer 1

i've just released 'unicorn-worker-killer' gem. This enables you to kill Unicorn worker based on 1) Max number of requests and 2) Process memory size (RSS), without affecting the request.

It's really easy to use. No external tool is required. At first, please add this line to your Gemfile.

gem 'unicorn-worker-killer'

Then, please add the following lines to your config.ru.

# Unicorn self-process killer
require 'unicorn/worker_killer'

# Max requests per worker
use Unicorn::WorkerKiller::MaxRequests, 10240 + Random.rand(10240)

# Max memory size (RSS) per worker
use Unicorn::WorkerKiller::Oom, (96 + Random.rand(32)) * 1024**2

It's highly recommended to randomize the threshold to avoid killing all workers at once.