elasticsearch/elasticsearch — pull request #5215 by jpountz (2014-02-21 11:01:05+00:00)
Title: Document the indices segments response format.

In particular it specifies that `memory_in_bytes` might return -1 (see https://github.com/elasticsearch/elasticsearch/issues/5201). I didn't want to give details why we might return -1 since the reason why may change in the future, but feel free to let me know if we should do so and I'll fix.