cProfile and pstats - The Python Profilers, Python Software Foundation, 2024 - Official documentation for Python's built-in profiling modules, useful for analyzing application code performance.
Site Reliability Engineering: How Google Runs Production Systems, Niall Richard Murphy, Betsy Beyer, Chris Jones, and Jennifer Petoff, 2017 (O'Reilly Media) - A resource covering principles of monitoring, metrics, and managing system performance to establish baselines and analyze issues.