You make a very good point here. I have seen several times, that people do not tune the garbage collector well. People sometimes take initial GC configuration for granted. Real GC Tuning however cannot be done without the required look requiring the application to be readily developed. However using performance management tools also provide insight into object allocation. Sometimes the real problem is that way to much objects are allocated and destroyed. Then even the best garbage collector strategy cannot help you. You just gave me the motivation to post more on this issue on my own blog at blog.dynatrace.com.