Updates Graph API Influx query

docs/clmc-service.md

@@ -74,13 +74,13 @@ It offers different API endpoints to configure and control the aggregator as wel
         These parameters are then filled in the following influx query template:
         
         ```
-        SELECT {0}, {1}, {2} AS mean_response_time FROM "{3}"."{4}".{5} WHERE sfc_i='{6}' and time>={7} and time<{8} GROUP BY ipendpoint, location, sf_i
+        SELECT {0} AS mean_response_time, {1} AS mean_request_size, {2} AS mean_response_size FROM "{3}"."{4}".{5} WHERE sfc_i='{6}' and time>={7} and time<{8} GROUP BY ipendpoint, location, sf_i
         ```
         
         E.g. for the minio service function, the following query will be used to retrieve the data from influx (request url is /graph/build?from=1528385420&to=1528385860):
         
         ```
-        SELECT mean(sum)/mean(count), mean(request_size)/mean(count), mean(response_size)/mean(count) AS mean_response_time FROM "MSDemo"."autogen".minio_http_requests_duration_seconds WHERE sfc_i='MSDemo_1' and time>=1528385420000000000 and time<1528385860000000000 GROUP BY ipendpoint, location, sf_i
+        SELECT mean(sum)/mean(count) AS mean_response_time, mean(request_size)/mean(count) AS mean_request_size, mean(response_size)/mean(count) AS mean_response_size FROM "MSDemo"."autogen".minio_http_requests_duration_seconds WHERE sfc_i='MSDemo_1' and time>=1528385420000000000 and time<1528385860000000000 GROUP BY ipendpoint, location, sf_i
         ```
             
         N.B. timestamps are converted to nano seconds.