I'm not sure if this is normal in ES2, but in ES1 this is not happening.
I don't have anything in my config, with field data, ie indices.fielddata.cache.size. indices.breaker.fielddata.limit, etc.
When I perfrom a search, I see some fielddata activity in _nodes/stats/indices/fielddata?fields=* and _cat/fielddata but after a few seconds they are down to 0. The evictions is constantly 0.
breakers tripped: 0
evictions: 0
I can see in _nodes/stats/indices/fielddata?fields=*:
fielddata: {
memory_size_in_bytes: 11736472,
then refresh, and it's:
memory_size_in_bytes: 3912,
Also, here's what the marvel chart looks like: http://imgur.com/a/aXUYh
What could be causing this?