Petersen, Robert [robert.peter...@mail.rakuten.com] wrote: > We actually have hundreds of facet-able fields, but most are specialized > and are only faceted upon if the user has drilled into the particular category > to which they are applicable and so they are only indexed for products > in those categories. I guess it is the facets that eat up so much of our > memory.
As Andre mentions, the problem is that the fc facet method maintains a list of values (or pointers to values, if we're talking text) for each document in the whole index. Faceting on a field that only has a single value in a single document in the whole index still allocates memory linear to the total number of documents. You are in the same situation as John Nielsen in the thread "Solr using a ridiculous amount of memory" http://lucene.472066.n3.nabble.com/Solr-using-a-ridiculous-amount-of-memory-tt4050840.html#none You could try and change the way you index the facet information to get around this waste, but it is quite a lot of work: http://sbdevel.wordpress.com/2013/04/16/you-are-faceting-itwrong/ > It was suggested that if I use facet method = enum for those particular > specialized facets then my memory usage would go down. If the number of unique values in the individual facets is low, this could work. If nothing else, it is very easy to try. - Toke Eskildsen
