Index size optimization between 4.5.1 and 4.10.4 Solr

[Natarajan, Rajeswari]

Hi,

We have upgraded solr from 4.5.1 to 4.10.4 and we see index size reduction.  
Trying to see if any optimization done to
decrease the index sizes , couldn’t locate.  If anyone knows why please share.


Thank you,
Rajeswari