Are you using DIH and CachedSqlEntityProcessor? I have a similar issue; the 3.6.1 jars of DIH might help you, see: http://www.mail-archive.com/solr-user@lucene.apache.org/msg65912.html
Kellen
- Slow indexing in solr 3.6 mechravi25
- Re: Slow indexing in solr 3.6 not interesting
