fixes #1920

warehouse/query-core/src/main/java/datawave/core/iterators/DatawaveFieldIndexCachingIteratorJexl.java

@@ -814,6 +814,9 @@ else if (key.compareTo(this.lastRangeSeeked.getStartKey()) < 0) {
                 }
 
                 // if we have any persisted data or we have scanned a significant number of keys, then persist it completely
+                // Note that we will not persist the data if we are not over the scan threshold and the data fits into
+                // one buffer (no persisted data). That means that if we need to rebuild the sorted set that we can do
+                // it relatively quickly so no need for a persisted set with a complete marker.
                 if (this.set != null && (this.set.hasPersistedData() || (scanThreshold <= scannedKeys.get()))) {
                     forcePersistence();
                 }