elaricsearch 5.4.3 bulk update docs, it increased more than 100 segments(it increase several segments while i bulk update docs in elasticsear1.7 ).
bulk update parameters:
elaricsearch version:5.4
index.refresh_interval:30s( effective when bulk index, not effective when bulk update, but why?)
Do not it(segments) depend on index.refresh_interval and buffer size?
