If you have tokenized fields of variable size and you want the field length to affect the relevance score, then you do not want to omit norms. Omitting norms is good for fields where length is of no importance (e.g. gender="Male" vs. gender="Female"). Omitting norms saves you heap/RAM, one byte per doc per field without norms, I believe.
Otis -- Sematext -- http://sematext.com/ -- Lucene - Solr - Nutch ----- Original Message ---- > From: Phillip Farber <[EMAIL PROTECTED]> > To: solr-user@lucene.apache.org > Sent: Tuesday, May 27, 2008 6:16:58 PM > Subject: field normalization and omitNorms > > > Hi all, > > I've been looking without success for a simple explanation of the effect > of omitNorms=false for a text field. Can someone point me to the > relevant doc? > > What is the effect of omitNorms=false on index size and query > performance for say 200K documents that have s single large text field > that ranges from maybe 30K up to around 800K? Do I want omitNorms=true > or false? > > Thanks! > > Phil
