+Tuning resource usage:
+
+ CollectionBatchSize limits the number of collections retrieved per
+ API transaction. If this is zero or omitted, page size is
+ determined by the API server's own page size limits (see
+ max_items_per_response and max_index_database_read configs).
+
+ CollectionBuffers sets the size of an internal queue of
+ collections. Higher values use more memory, and improve throughput
+ by allowing keep-balance to fetch the next page of collections
+ while the current page is still being processed. If this is zero
+ or omitted, pages are processed serially.
+