> On May 31, 2019, at 11:27 PM, John Davis <johndavis925...@gmail.com> wrote: > > 2. Merging segments - does solr load the entire segment in memory or chunks > of it? if later how large are these chunks
No, it does not read the entire segment into memory. A fundamental part of the Lucene design is streaming posting lists into memory and processing them sequentially. The same amount of memory is needed for small or large segments. Each posting list is in document-id order. The merge is a merge of sorted lists, writing a new posting list in document-id order. wunder Walter Underwood wun...@wunderwood.org http://observer.wunderwood.org/ (my blog)
