What are the values of the start and rows parameters you are using? When you say the controller shard takes a long time, how long is it taking - 100ms, 1s, 10s...?
-Michael -----Original Message----- From: qungg [mailto:qzheng1...@gmail.com] Sent: Tuesday, March 26, 2013 11:17 AM To: solr-user@lucene.apache.org Subject: Slow performance on distributed search Hi, I have 40 shards running on 48 core machine with 256GB RAM (The data is about 40 GB). I am using legacy distributed method as setup. So I have one additional shard with no data. Queries would go to this shard and the shard would merge result from the rest of the 40 shards. From the log, I see that query time for each shard is almost instant, but the controller shard take a long time to merge the result. I tried to cache the results to controller shards like I do in each individual shard, but it wouldn't not cache, probably because the controller shard contains no documents. I can tell that merging result is the bottle neck here, but I couldn't find a way to fix it. Please let me know if you guys have any suggestion. Thanks in advance! Best Regards, Qun -- View this message in context: http://lucene.472066.n3.nabble.com/Slow-performance-on-distributed-search-tp4051434.html Sent from the Solr - User mailing list archive at Nabble.com.
