Monitoring GC
In order to decide upon the right garbage collector, you’ll need to know your application. There are a few metrics that are especially important for the GC:
- Allocation rate: How fast the application allocates objects in memory.
- Heap population: The number of objects and their size living on the heap.
- Mutation rate: How often references are updated in memory.
- Average object live time: The time the objects live on average. One application may have objects that die young, while another application may have objects that live longer.
The monitoring of the performance of the GC requires different metrics. The most important ones are mark time, compaction time, and GC cycle time. The mark time entails the time it takes the garbage collector to find all the live objects on the heap. Compaction time is how long it takes the garbage collector to free up all the space and relocate the objects. The GC cycle time is how long it takes the garbage collector...