diff --git a/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/index/property/strategy/ContentMirrorStoreStrategy.java b/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/index/property/strategy/ContentMirrorStoreStrategy.java
index 2ddd097..c3584c0 100644
--- a/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/index/property/strategy/ContentMirrorStoreStrategy.java
+++ b/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/index/property/strategy/ContentMirrorStoreStrategy.java
@@ -169,7 +169,9 @@ public class ContentMirrorStoreStrategy implements IndexStoreStrategy {
             v.visit(index);
             count = v.getEstimatedCount();
             // "is not null" queries typically read more data
-            count *= 10;
+            if (count > max) {
+                count *= 10;
+            }
         } else {
             int size = values.size();
             if (size == 0) {