ExqLimit implements different types of rate limiting for Exq queue.
config :exq,
queues: [{"default", {ExqLimit.Global, limit: 10}}]
ExqLimit.Global - Global concurrency limit across all worker nodes.
ExqLimit.Local - Local concurrency limit for a worker node.
ExqLimit.GCRA - An implementation of GCRA algorithm.
ExqLimit.And - A limiter which allows to combine other limiters.