Here is how I was testing: stop Solr, delete the "data" folder, start Solr, start indexing, and finally check index size.
I used the same pattern for the before and after my (see my original email) and each time I run this test, the index size ended up being larger; restarting Solr did the trick. Each document I'm adding is unique so there is no deletion involved here at all. I'm testing this on Windows, so that maybe a factor too (the OS is not releasing file handles?!) Steve On Tue, Feb 16, 2016 at 11:57 AM, Shawn Heisey <apa...@elyograg.org> wrote: > On 2/16/2016 9:37 AM, Steven White wrote: > > I found the issue: as soon as I restart Solr, the index size goes down. > > > > My index and data size must have been at a border line where some > segments > > are not released on my last document commit. > > I think the only likely thing that could cause this behavior is having > index segments that are composed fully of deleted documents, which > supports the idea that Upayavira mentioned. An optimize would probably > cause the same behavior as the restart. > > If you do enough indexing to cause a segment merge, that would probably > also remove segments composed only of deleted documents. > > Thanks, > Shawn > >