Updated documents are marked as deleted in the old segment and added to a new segment. When commits happen, merges occur and only then is the space occupied by the deleted document reclaimed.
Which segments are merged on commit depends on a number of factors. Unless you can prove the extra space is a problem, you should just ignore the issue. The percentage of deleted documents should max out at around 33% on Solr 7.5+. For background on merging, see: http://blog.mikemccandless.com/2011/02/visualizing-lucenes-segment-merges.html The third animation (TieredMergePolicy) is the default. Best, Erick > On Jul 1, 2020, at 3:51 PM, ramyogi <ramy...@gmail.com> wrote: > > Even though same document indexed over and over again due to incremental > update. Index size is being increased. > Do I miss any configuration to make optimization occur by internally ? > > > > -- > Sent from: https://lucene.472066.n3.nabble.com/Solr-User-f472068.html
