WebSphere 6.1 generational gc default nursery size limit

Question

By default the nursery is supposed to be 25% of the heap, we have the initial heap size set to 1GB. With verbose gc on, we see that our nursery is sized at 55-60MB. We have forced the size using -Xmns256M -Xmnx512M. Shouldn't this happen automatically?

Answer 1

Are you missing the M at the end of -Xmnx512M?

Answer 2

@matt b

We do have that, just missed it when typing the question.
I updated the question.

Thanks