how to reduce solr memory usage?

I use solr in my application, there is just hundred开发者_如何学Gos of documents. the memory usage is about 80M, how to reduce it?

80M is not much, in fact it's pretty much the mininum, you won't go much lower than that.

Some factors that affect memory usage:

• Input document size
• Multi-threaded document updates
• Cache size
• Facet queries
• Sorting

References:

• http://wiki.apache.org/solr/SolrPerformanceFactors#Factors_affecting_memory_usage
• http://www.nabble.com/Debugging-Solr-memory-usage-heap-problems-td8832794.html
• http://osdir.com/ml/solr-user.lucene.apache.org/2009-02/msg00050.html
• http://mail-archives.apache.org/mod_mbox/lucene-solr-user/200905.mbox/%3C552701.4457.qm@web50308.mail.re2.yahoo.com%3E