diff --git a/solr/CHANGES.txt b/solr/CHANGES.txt
index dee3965495b..5aafe67e713 100644
--- a/solr/CHANGES.txt
+++ b/solr/CHANGES.txt
@@ -228,6 +228,8 @@ Improvements
 ---------------------
 * SOLR-17860: DocBasedVersionConstraintsProcessorFactory now supports PULL replicas. (Houston Putman)
 
+* SOLR-17893: Speed up Remote Proxy for high QPS, utilizing ClusterState caching. (Houston Putman)
+
 Optimizations
 ---------------------
 (No changes)
diff --git a/solr/core/src/java/org/apache/solr/servlet/HttpSolrCall.java b/solr/core/src/java/org/apache/solr/servlet/HttpSolrCall.java
index b9f3842b820..c0b78fc1a9f 100644
--- a/solr/core/src/java/org/apache/solr/servlet/HttpSolrCall.java
+++ b/solr/core/src/java/org/apache/solr/servlet/HttpSolrCall.java
@@ -327,7 +327,7 @@ protected DocCollection resolveDocCollection(String collectionName) {
     }
     ZkStateReader zkStateReader = cores.getZkController().getZkStateReader();
     Supplier<DocCollection> logic =
-        () -> zkStateReader.getClusterState().getCollectionOrNull(collectionName);
+        () -> zkStateReader.getClusterState().getCollectionOrNull(collectionName, true);
 
     DocCollection docCollection = logic.get();
     if (docCollection != null) {
@@ -930,7 +930,7 @@ private SolrCore checkProps(ZkNodeProps zkProps) {
 
   protected String getRemoteCoreUrl(String collectionName) throws SolrException {
     ClusterState clusterState = cores.getZkController().getClusterState();
-    final DocCollection docCollection = clusterState.getCollectionOrNull(collectionName);
+    final DocCollection docCollection = clusterState.getCollectionOrNull(collectionName, true);
     if (docCollection == null) {
       return null;
     }
diff --git a/solr/solrj-zookeeper/src/java/org/apache/solr/common/cloud/ZkStateReader.java b/solr/solrj-zookeeper/src/java/org/apache/solr/common/cloud/ZkStateReader.java
index 7d0f80379b2..6a61ad69fe4 100644
--- a/solr/solrj-zookeeper/src/java/org/apache/solr/common/cloud/ZkStateReader.java
+++ b/solr/solrj-zookeeper/src/java/org/apache/solr/common/cloud/ZkStateReader.java
@@ -762,6 +762,7 @@ public synchronized DocCollection get(boolean allowCached) {
           Stat freshStats = null;
           try {
             freshStats = zkClient.exists(DocCollection.getCollectionPath(collName), null, true);
+            lastUpdateTime = System.nanoTime();
           } catch (Exception e) {
           }
           if (freshStats != null