How do you handle resource contention when multiple jobs run simultaneously in CI CD pipelines

How do you handle resource contention when multiple jobs run simultaneously in CI/CD pipelines?

When several CI/CD jobs or builds run in parallel, resource contention may significantly impact performance and reliability. This question focuses on the strategies and tools you use to manage and allocate resources effectively within CI/CD environments, including practices to avoid bottlenecks, optimize resource usage, and prevent job failures due to competition for CPU, memory, or I/O resources.