Expose more parameters for the data service

Change-Id: Iccb7f7b98d4e4dc81899dfd548cfde19b789dd2c
diff --git a/README.rst b/README.rst
index f401f74..60d3cb8 100644
--- a/README.rst
+++ b/README.rst
@@ -63,6 +63,11 @@
         enabled: true
         data:
           max_series_per_database: 20000000
+          cache_max_memory_size: 524288000
+          cache_snapshot_memory_size: 26214400
+          cache_snapshot_write_cold_duration: "5m"
+          compact_full_write_cold_duration: "2h"2h"
+          max_values_per_tag: 5000
 
 Single-node influxdb with an admin user: