Hi SG, Doc values is another file to write so indexing performances will suffer. In theory, query performances will suffer because alternative is in memory structure (fieldCache and fieldValueCache). In practice, it will not because in memory structure requires larger heap, requires time/resources to build after each commit or on first query and it is likely that doc values’ files will be cached by OS so it will not be “disk speed”.
HTH, Emir -- Monitoring - Log Management - Alerting - Anomaly Detection Solr & Elasticsearch Consulting Support Training - http://sematext.com/ > On 21 Dec 2017, at 02:09, S G <sg.online.em...@gmail.com> wrote: > > Hi, > > One of our Solr users is trying to set docValues="true" for multivalued > string fields and boolean-type fields. > > I am not sure what the performance impact of that would be. > Can docValues negatively affect performance in any way? > > We are using Solr 6.5.1 and also experimenting with 7.1.0 > > Thanks > SG
