Pull request #1451: missing index for statistics

Merge in CATS/clowder from stat_index to release/1.8.3

* commit 'ad9eae4433e62165078268e60cea2ba7eacda020':
  missing index for statistics

Author: lmarini

CHANGELOG.md

@@ -16,6 +16,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
   [CATS-1042](https://opensource.ncsa.illinois.edu/jira/browse/CATS-1042)
 - User-owned resources will now appear in search results regardless of space permissions. 
 - Updating space ownership for datasets and collections will correctly reindex those resources for searches.
+- Missing index in statistics which would slow down system when inserting download/views.
 
 ### Added
 - GitHub Actions to compile and test the code base, create documentation and docker images.

app/services/mongodb/MongoSalatPlugin.scala

@@ -171,6 +171,8 @@ class MongoSalatPlugin(app: Application) extends Plugin {
 
     collection("contextld").ensureIndex(MongoDBObject("contextName" -> 1))
 
+    collection("statistics.users").ensureIndex(MongoDBObject("user_id" -> 1, "resource_id" -> 1))
+
     collection("dtsrequests").ensureIndex(MongoDBObject("startTime" -> -1, "endTime" -> -1))
     collection("dtsrequests").ensureIndex(MongoDBObject("file_id" -> -1))
     collection("versus.descriptors").ensureIndex(MongoDBObject("fileId" -> 1))