Oracle released, under GPLv2, a couple of tools to help with memory
management on servers, adaptivemm and adptived:

adaptivemm - A userspace daemon for proactive free memory management
adaptived is a simple yet extremely powerful and flexible
cause-and-effect daemon

Even IMHO they should be two packages, I'm opening a single RFP because
they work closely together.

  More details about what these tools do, specially the newer adaptived,
can be found in [1].
The link for the source code is in [2].

1. https://blogs.oracle.com/linux/post/introducing-adaptived
2. https://github.com/oracle/adaptivemm