Increase prometheus-es-exporter per-aggregate result sizes.

Related-PROD: PROD-34821
Change-Id: I84a000c7b21205e00f03434b4fbfba822f725d71
diff --git a/prometheus/elasticsearch_exporter/queries/default.yml b/prometheus/elasticsearch_exporter/queries/default.yml
index eeb013c..ca1c3e1 100644
--- a/prometheus/elasticsearch_exporter/queries/default.yml
+++ b/prometheus/elasticsearch_exporter/queries/default.yml
@@ -26,12 +26,14 @@
               "aggs": {
                 "program": {
                   "terms": {
-                    "field": "programname.keyword"
+                    "field": "programname.keyword",
+                    "size": 10000
                   },
                   "aggs": {
                     "host": {
                       "terms": {
-                        "field": "Hostname.keyword"
+                        "field": "Hostname.keyword",
+                        "size": 10000
                       }
                     }
                   }