I know that a refresh will create new Lucene segments from newly indexed
documents, but does the refresh directly signal the Lucene merge scheduler
in any way? If there are no documents being indexed, does a positive
refresh interval (> 0ms) have any effect on merging?
We are facing a scenario were too many segments on a relatively small index
is causing search performance issues. Too much time is spent advancing
between segments and only an optimize (er, force merge) will alleviate the