3. Configuration 3.1. Introduction To Configuring 3.1.2. Parameter names and values3.1.4. Setting parameters via the HTTP API 3.2. Base Configuration 3.3. Configuring Clustering 3.3.2. RPC Performance Tuning 3.4.1. couch_peruser Options 3.5.1. HTTP Server Options3.5.4. Virtual Hosts 3.6. Authentication and Authorization 3.6.2. Authentication Configuration 3.7.1. Database Compaction Options3.7.3. Compaction Daemon 3.9. IO Queue 3.10. Logging 3.11. Replicator 3.12. Query Servers 3.12.2. Query Servers Configuration3.12.4. Search 3.13. Miscellaneous Parameters 3.13.2. Statistic Calculation3.13.4. Vendor information3.13.6. Configuration of Database Purge 3.14. Resharding