The segments are effectively ref counted, so once the last scroll still using an old (already merged away) segment is deleted, it will be removed.
Mike McCandless http://blog.mikemccandless.com On Fri, Jan 16, 2015 at 4:15 AM, Jason Wee <peich...@gmail.com> wrote: > > http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/search-request-scroll.html > > Normally, the background merge process optimizes the index by merging > together smaller segments to create new bigger segments, at which time the > smaller segments are deleted. This process continues during scrolling, but > an open search context prevents the old segments from being deleted while > they are still in use. This is how Elasticsearch is able to return the > results of the initial search request, regardless of subsequent changes to > documents. > > Tip > Keeping older segments alive means that more file handles are needed. > Ensure that you have configured your nodes to have ample free file handles. > See the section called “File Descriptorsedit”. > > Hello, > > Read the above description, can anyone tell what happened to the segments > after the scroll time expired? Does the segments will automatically merge? > What if a lot (like 50 active) of scroll happened and how will it impact > the lucene segment/elasticsearch? comments? > > Jason > > -- > You received this message because you are subscribed to the Google Groups > "elasticsearch" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to elasticsearch+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/elasticsearch/2971e92d-397f-4d4b-a6da-0428a6cde638%40googlegroups.com > <https://groups.google.com/d/msgid/elasticsearch/2971e92d-397f-4d4b-a6da-0428a6cde638%40googlegroups.com?utm_medium=email&utm_source=footer> > . > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to elasticsearch+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/elasticsearch/CAD7smRfPHTg6K7A9jn%3D3nT26hjmCBUkydzFZzyJNn8pxv8g%3DdA%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
