Hi Shawn, Thank you for response. Everything you said is correct in general.
Our index is in HDFS, but we did not change any configuration after we deleted 35% of records and optimized. The relatively slow commit (soft commit and warming up took 1.5 minutes) is OK for our use case (adding hundreds of thousands and even millions of records and then committing). The question is why it takes much longer after optimization, when disk caches, network and other configuration remained the same and the index is smaller? Thanks, Victor -- View this message in context: http://lucene.472066.n3.nabble.com/Very-Slow-Commits-After-Solr-Index-Optimization-tp4297022p4297548.html Sent from the Solr - User mailing list archive at Nabble.com.