Allow to specify ratio of allocation of available memory to young generation in heap

[mmanciop]

In applications that should optimise for minor garbage collection (which is most of the cloud-based one in my experience), it is useful to set the -Xmn to fix how much memory can be allocated in the heap for young generation. This parameter usually makes sense a fraction of the total heap memory, so that allocating more memory to the surrounding container lets the memory allocated to young generation expand linearly with the total memory available to the heap.

We have implemented this feature in the forked the memory calculator used by the Instana Agent, but we'd be happy to contribute back if this feature is interesting to this project.

[dmikusa]

Hi, thanks for reaching out! Do you have a link to the modifications you made?

The first thought that comes to mind is that if you want to change any of the JVM memory settings you can certainly do that. The memory calculator will see that you've set different values and step out of the way. Is there something with -Xmn where this doesn't work? Or are you more suggesting that this should be the default?

[mayrstefan]

I guess this is instana@6967c77