diff --git a/performanceDb/src/main/java/org/lucares/performance/db/TagsToFile.java b/performanceDb/src/main/java/org/lucares/performance/db/TagsToFile.java
index 5991a21..6ee67a4 100644
--- a/performanceDb/src/main/java/org/lucares/performance/db/TagsToFile.java
+++ b/performanceDb/src/main/java/org/lucares/performance/db/TagsToFile.java
@@ -129,6 +129,9 @@ public class TagsToFile implements AutoCloseable {
 		final List<TagSpecificBaseDir> result = new ArrayList<>();
 
 		final List<Doc> searchResult = db.search(query);
+		if (searchResult.size() > 100_000){
+			throw new IllegalStateException("Too many results.");
+		}
 
 		for (final Doc document : searchResult) {