GitHub caps how many CI jobs run at the same time
per account — shared across every repository you own (for example 20 jobs on Free, 40 on Pro), not per repo. This repository adds its own limit,
Max concurrent runners = 5, so a large history backfill paces itself instead of monopolising your account’s runners; routine pushes and tooling updates draw from the same pool. Runs beyond the limit are queued and start automatically as earlier ones finish — nothing is lost.
Change this for LabVIEW-CI-Test17 →