Release 2.2.89
It adds to new properties to the ox config. They are ox2.profile and ox2.run-gc. They are Boolean and the default value is false.
The former will log JVM memory information at the start of each step and upload and at the end.
The latter will force garbage collector to be called at the end of each step.
<ox2 profile="true" run-gc="true" ...>
...
</ox2>