Hello, we are experiencing OOM exceptions in our single core solr instance (on a (huge) amazon EC2 machine). We investigated a lot in the mailing list and through jmap/jhat dump analyzing and the problem resides in the lucene FieldCache that fills the heap and blows up the server.
Our index is quite small but we have a lot of sort queries on fields that are dynamic,of type long representing timestamps and are not present in all the documents. Those queries apply sorting on 12-15 of those fields. We are using solr 1.4 in production and the dump shows a lot of Integer/Character and Byte Array filled up with 0s. With solr's trunk code things does not change. In the mailing list we saw a lot of messages related to this issues: we tried truncating the dates to day precision,using missingSortLast = true,changing the field type from slong to long,setting autowarming to different values,disabling and enabling caches with different values but we did not manage to solve the problem. We were thinking to implement an LRUFieldCache field type to manage the FieldCache as an LRU and preventing but, before starting a new development, we want to be sure that we are not doing anything wrong in the solr configuration or in the index generation. Any help would be appreciated. Regards, Matteo
