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[Server] How to Increase Concurrency Limits within Self-hosted CircleCI?

January 28, 2026 15:22

How to increase concurrency on Server

There is no concurrency limit from within the installation for server customers. You just have to increase the nomad_clients autoscaling group to the desired value and add parallelism attribute in the config file like below.

version: 2.1
jobs:
  test:
    docker:
      - image: cimg/<language>:<version TAG>
    parallelism: 4

More about Parallelism: https://circleci.com/docs/guides/optimize/parallelism-faster-jobs/#specify-a-jobs-parallelism-level

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