Explain the Garbage Collection mechanism in Java. Can you describe how it works, including the different types of garbage collectors available? Provide insight into tuning the garbage collector in a high-load environment. Discuss the impact of garbage collection on application performance.

Garbage Collection in Java automatically handles memory management. It frees memory by removing objects that are no longer in use. The key types of collectors include Serial, Parallel, CMS (Concurrent Mark-Sweep), and G1 collectors. For tuning, important parameters include heap size, survivor space size, and triggering thresholds.