Hello, When you say 2 slices, do you mean 2 shards? As in, you're doing a distributed query?
If you're doing a distributed query, then for group.ngroups to work you need to ensure that all documents for a group exist on a single shard. However, what you're describing sounds an awful lot like this JIRA issue that I entered a while ago for distributed grouping. I found that the hit count was coming only from the shards that ended up having results in the documents that were returned. I didn't test group.ngroups at the time. https://issues.apache.org/jira/browse/SOLR-3316 If this is a similar issue then you should make a new Jira issue. Cody -----Original Message----- From: Francois Perron [mailto:francois.per...@wantedanalytics.com] Sent: Tuesday, May 01, 2012 6:47 AM To: solr-user@lucene.apache.org Subject: Grouping ngroups count Hello all, I tried to use grouping with 2 slices with a index of 35K documents. When I ask top 10 rows, grouped by filed A, it gave me about 16K groups. But, if I ask for top 20K rows, the ngroups property is now at 30K. Do you know why and of course how to fix it ? Thanks.
