We are trying to run SOLR with big index, using as little RAM as possible. Simple search for our cases works nice, but field collapsing (group=true) queries fall with OOM.
Our setup is several shards per SOLR entity, each shard on it's own HDD. We've tried same queries, but to one specific shard, and those queries worked well (no OOMs). Then we changed shard being queried and measured RAM usage. We saw, that while there is only one shard being queried, used RAM increased significantly. So, as we see, memory, used by first shard to group, wasn't released. Caches are already nearly zero. Changing shards, we've managed to make SOLR fall. My question is, why is it so? What do we need to do, to release memory, to, at the end, be able to query shards alternately (cause parallel group query fails nearly always)? -- View this message in context: http://lucene.472066.n3.nabble.com/Field-collapsing-memory-usage-tp4181092.html Sent from the Solr - User mailing list archive at Nabble.com.
