diff --git a/connector/src/main/java/io/pixelsdb/pixels/trino/PixelsPageSource.java b/connector/src/main/java/io/pixelsdb/pixels/trino/PixelsPageSource.java
index 89ebe4a..fcdec6b 100644
--- a/connector/src/main/java/io/pixelsdb/pixels/trino/PixelsPageSource.java
+++ b/connector/src/main/java/io/pixelsdb/pixels/trino/PixelsPageSource.java
@@ -385,7 +385,7 @@ public Page getNextPage()
                             return getNextPage();
                         } else
                         {
-                            close();
+                            this.close();
                             return null;
                         }
                     }
@@ -425,7 +425,7 @@ public Page getNextPage()
                         return getNextPage();
                     } else
                     {
-                        close();
+                        this.close();
                         return null;
                     }
                 }
@@ -442,6 +442,7 @@ public Page getNextPage()
     @Override
     public void close()
     {
+        // PIXELS-403: page source is not accessed by multiple threads, there is no need to synchronize on this method.
         if (closed)
         {
             return;
@@ -457,6 +458,9 @@ public void close()
         closed = true;
     }
 
+    /**
+     * Close the current pixels reader without closing this page source.
+     */
     private void closeReader()
     {
         try