To search for duplicate IDs, I am running the following query: select?q=*:*&facet=true&facet.field=id&rows=0
However, since upgrading from Solr 4.1 to Solr 4.3 I am receiving OutOfMemoryError errors instead of the desired facet: <response><lst name="error"><str name="msg">java.lang.OutOfMemoryError: Java heap space</str><str name="trace">java.lang.RuntimeException: java.lang.OutOfMemoryError: Java heap space at org.apache.solr.servlet.SolrDispatchFilter.sendError(SolrDispatchFilter.java:670) at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:380) at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:155) at ... Might there be a less resource-intensive way to get this information. This is Solr 4.3 running on Ubuntu Server 12.04 in Jetty. The index has over 100,000,000 small records, for a total of about 95 GiB of disk space, with Solr running on it's own disk. Actually, the 'disk' is an Amazon Web Service EBS volume. -- Dotan Cohen http://gibberish.co.il http://what-is-what.com