[huoju]

Lucene and Solr eat too many memory, they are not fit to vps users. Cloudsearch is more cheaper than setup a delicate server for search.

[Ecio78]

it seems that the latest Solr 3.5.0. release use less memory: Bug fixes and improvements from Apache Lucene 3.5.0, including a very substantial (3-5X) RAM reduction required to hold the terms index on opening an IndexReader http://lucene.apache.org/solr/solrnews.html