The refresh API allows to explicitly refresh one or more index, making all operations performed since the last refresh available for search. The (near) real-time capabilities depend on the index engine used. For example, the internal one requires refresh to be called, but by default a refresh is scheduled periodically.
POST /twitter/_refresh
The refresh API can be applied to more than one index with a single
call, or even on _all the indices.
POST /kimchy,elasticsearch/_refresh POST /_refresh