Sun Java System Web Server 7.0 Update 7 Performance Tuning, Sizing, and Scaling Guide

Tuning the Garbage Collector

Monitoring the Garbage Collection (GC) activity at the development server and accordingly tuning JVM and GC settings before deploying the server into production is necessary. The GC settings vary depending on the application you are running.

Garbage collection reclaims the heap space previously allocated to objects no longer needed. The process of locating and removing the dead objects can stall any application and consume as much as 25 percent throughput.