<!-- * Use this issue template for suggesting new docs or updates to existing docs. Note: Doc work as part of feature development is covered in the Feature Request template. * For issues related to features of the docs.gitlab.com site, see https://gitlab.com/gitlab-org/gitlab-docs/issues/ * For information about documentation content and process, see https://docs.gitlab.com/ee/development/documentation/ --> ### Problem to solve <!-- Include the following detail as necessary: * What product or feature(s) affected? * What docs or doc section affected? Include links or paths. * Is there a problem with a specific document, or a feature/process that's not addressed sufficiently in docs? * Any other ideas or requests? --> Several GitLab suggested architectures presented in our documentation are recommending to run extra Sidekiq nodes to improve performance. However, our documentation does not provide details about how to run this component outside of an application node. ### Further details <!-- * Any concepts, procedures, reference info we could add to make it easier to successfully use GitLab? * Include use cases, benefits, and/or goals for this work. * If adding content: What audience is it intended for? (What roles and scenarios?) For ideas, see personas at https://design.gitlab.com/research/personas or the persona labels at https://gitlab.com/groups/gitlab-org/-/labels?utf8=%E2%9C%93&subscribed=&search=persona%3A --> In the `gitlab.rb` template is mentioned `sidekiq_cluster['enable']` and `sidekiq_cluster['ha']` but these options are also not documented in our Sidekiq documentation. ### Proposal <!-- Further specifics for how can we solve the problem. --> We should extend our HA documentation approaching how to setup extra sidekiq nodes, probably the documentation about how to setup [extra sidekiq nodes](https://docs.gitlab.com/ee/administration/operations/extra_sidekiq_processes.html) could be linked to it. - [x] Docs on a single Sidekiq machine https://gitlab.com/gitlab-org/gitlab/-/merge_requests/25486 - [ ] Docs for Sidekiq cluster ### Who can address the issue <!-- What if any special expertise is required to resolve this issue? --> Someone with knowledge on GitLab HA and especially knowledge on Sidekiq / Sidekiq cluster ### Other links/references <!-- E.g. related GitLab issues/MRs -->