1 files changed, 9 insertions, 0 deletions
diff --git a/src/mongo/db/catalog/multi_index_block.h b/src/mongo/db/catalog/multi_index_block.h
index 54b12fb622a..9c82ceb9a3c 100644
--- a/src/mongo/db/catalog/multi_index_block.h
+++ b/src/mongo/db/catalog/multi_index_block.h
@@ -310,6 +310,13 @@ private:
                                      const BSONObj& doc,
                                      unsigned long long iteration) const;
 
+    const IndexCatalogEntry* _findSmallestReferenceIdx(OperationContext* opCtx,
+                                                       const CollectionPtr& collection) const;
+
+    Status _scanReferenceIdxInsertAndCommit(OperationContext* opCtx,
+                                            const CollectionPtr& collection,
+                                            const IndexCatalogEntry* refIdx);
+
     // Is set during init() and ensures subsequent function calls act on the same Collection.
     boost::optional<UUID> _collectionUUID;
 
@@ -319,6 +326,8 @@ private:
 
     bool _ignoreUnique = false;
 
+    std::size_t _eachIndexBuildMaxMemoryUsageBytes = 0;
+
     // Set to true when no work remains to be done, the object can safely destruct without leaving
     // incorrect state set anywhere.
     bool _buildIsCleanedUp = true;