How do you troubleshoot slow fact gathering in Ansible?

1. Time the gather_facts step specifically using -vvv or the profile_tasks callback to confirm it's actually the bottleneck versus other tasks.
2. Disable gathering for plays that don't need facts (gather_facts: false), which is often the single biggest win if facts aren't actually used.
3. Narrow gathered subsets with gather_subset to skip expensive categories (like all network interfaces) when only a few specific facts are needed.
4. Enable fact caching so repeated runs within the cache's expiration window skip live gathering entirely and reuse the last known values.
5. Check for slow or high-latency hosts specifically - a handful of consistently slow hosts (not the whole inventory) often points to a host-level issue, like DNS resolution delays during setup, rather than an Ansible-wide problem.

- hosts: all
  gather_facts: true
  vars:
    ansible_facts_modules: setup
  tasks:
    - name: Only gather what's needed
      ansible.builtin.setup:
        gather_subset:
          - network

Fact gathering is one of the more overlooked sources of playbook slowness precisely because it's implicit - it's worth explicitly timing it before assuming a slow run is due to the playbook's own task logic.

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