How Kinsta handles PHP threads, caching, and performance at scale

Surface-level feature lists rarely tell the complete story when you evaluate managed WordPress hosting for development. You need to understand how PHP thread allocation impacts concurrent request handling, how multiple caching layers work together to reduce database load, and whether containerization actually prevents problems under real-world conditions.

This guide breaks down Kinsta’s technical architecture for PHP thread management, multi-layer caching, and container isolation. We also include quotes from Nikola Djuric, a senior support engineer on the Kinsta team, on the intricacies of PHP thread management.

Let’s start with how PHP actually handles requests.

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