
admin.databaseSetRangeIndexOptimize( config as element(configuration), database-id as (Number|String), value as String ) as element(configuration)
		  This function sets the range index optimize setting
		  for the specified database in the configuration.
		  When set to facet-time, range indexes are
		  optimized to minimize the amount of CPU time
		  used. When set to memory-size, range
		  indexes are optimized to minimize the amount of memory
		  used.
	  
http://marklogic.com/xdmp/privileges/admin/database
http://marklogic.com/xdmp/privileges/admin/database/{id}
http://marklogic.com/xdmp/privileges/admin/database/index
http://marklogic.com/xdmp/privileges/admin/database/index/{id}
  
  const admin = require('/MarkLogic/admin.xqy');
  const config = admin.getConfiguration()
  admin.databaseSetRangeIndexOptimize(config, xdmp.database("myDatabase"),
        "memorySize")
   //returns the new configuration element -- use admin.saveConfiguration
   //to save the changes to the configuration or pass the configuration
   //to other Admin API functions to make other changes.