Hi again,
After digging through Solr and Lucene code some more and instrumenting it with
lots of timing I can see three main culprits when it comes to replicating data
from 3 cores around the same time:
Lucene IndexWriter's getFieldNumberMap
Have often seen times up around 30 seconds but what is
Everything you are describing smells like some kind of Disk/IO throttling
behavior external to Solr.
Nothing you've identified below should be particularly "slow" and it
certainly shouldn't get orders of magnitude slower for subsequent
SolrCores in rapid succession, even as those cores are sm
