GC Algorithms outdated with large RAM

Talking about with larger and larger amounts of RAM current GC algorithms can't keep up and the pause times are unacceptable among other things.

http://www.slideshare.net/cloudera/hbase-hug-presentation

http://www.cloudera.com/blog/2011/02/avoiding-full-gcs-in-hbase-with-memstore-local-allocation-buffers-part-1/