update memory (#333)

* update ENV_MAX_CONCURRENT

* enable memory

Author: angosr

affine/database/system_config.json

@@ -120,7 +120,7 @@
     },
     "MEMORY": {
       "enabled_for_sampling": true,
-      "enabled_for_scoring": false,
+      "enabled_for_scoring": true,
       "min_completeness": 0.8,
       "sampling_config": {
         "dataset_range": [[0, 1000000000]],