On 8/7/2015 10:25 AM, naga sharathrayapati wrote: > i have added docValues="true" to my existing schema and I have seen > exponential increase in the size of the index. > > The reason in going with docValues is to improve the faceting query time. > > schema: > <field name="abcdef" type="date" indexed="true" stored="true" > multiValued="false" docValues="true"/> > > Is this ok? am i doing anything wrong in the schema?
An exponential increase would REALLY surprise me. I have seen indexes nearly double in size with the addition of docValues on the primary search field. You are storing another complete copy of the original value sent to Solr. It will be compressed if your Solr version is at least 4.2, just like the stored value is in 4.1 and later. If you are only adding docValues to a date field, I would not expect that to affect your index size very much at all, but if you are adding them to large text fields, it would. Performance tweaks are nearly always a trade -- typically your space and memory utilization goes up, and it runs faster. If you don't have enough memory, then either performance will go down or the system will stop working entirely. Thanks, Shawn
