diff -r 6e6e9e73abaa -r 90c89138c234 lucene/src/luan/modules/lucene/LuceneIndex.java
--- a/lucene/src/luan/modules/lucene/LuceneIndex.java	Fri May 13 14:51:05 2016 -0600
+++ b/lucene/src/luan/modules/lucene/LuceneIndex.java	Fri May 13 17:13:13 2016 -0600
@@ -12,6 +12,9 @@
 import java.util.Set;
 import java.util.HashSet;
 import java.util.Collections;
+import java.util.concurrent.ConcurrentMap;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.atomic.AtomicInteger;
 import java.util.concurrent.locks.Lock;
 import java.util.concurrent.locks.ReentrantLock;
 import java.util.zip.ZipOutputStream;
@@ -92,13 +95,19 @@
 	public final LuanTable indexed_only_fields = new LuanTable();
 	private final Analyzer analyzer;
 
+	private static ConcurrentMap<File,AtomicInteger> globalWriteCounters = new ConcurrentHashMap<File,AtomicInteger>();
+	private final File fileDir;
+	private int writeCount;
+
 	public LuceneIndex(LuanState luan,String indexDirStr,FieldParser defaultFieldParser,String[] defaultFields) throws LuanException, IOException {
 		mfp = defaultFieldParser==null ? new MultiFieldParser() : new MultiFieldParser(defaultFieldParser,defaultFields);
 		mfp.fields.put( "type", STRING_FIELD_PARSER );
 		mfp.fields.put( "id", NumberFieldParser.LONG );
 		File indexDir = new File(indexDirStr);
 		this.indexDir = indexDir;
-		Directory dir = FSDirectory.open(indexDir);
+		FSDirectory dir = FSDirectory.open(indexDir);
+		fileDir = dir.getDirectory();
+		globalWriteCounters.putIfAbsent(fileDir,new AtomicInteger());
 		Version version = Version.LUCENE_4_9;		
 		Analyzer analyzer = STRING_FIELD_PARSER.analyzer;
 		if( defaultFieldParser instanceof StringFieldParser ) {
@@ -117,7 +126,13 @@
 		initId();
 	}
 
+	private int globalWriteCount() {
+		return globalWriteCounters.get(fileDir).get();
+	}
 
+	private void wrote() {
+		globalWriteCounters.get(fileDir).incrementAndGet();
+	}
 
 	public void delete_all() throws IOException {
 		boolean commit = !writeLock.isHeldByCurrentThread();
@@ -127,6 +142,7 @@
 			id = idLim = 0;
 			if(commit) writer.commit();
 		} finally {
+			wrote();
 			writeLock.unlock();
 		}
 	}
@@ -146,6 +162,7 @@
 			writer.deleteDocuments(query);
 			if(commit) writer.commit();
 		} finally {
+			wrote();
 			writeLock.unlock();
 		}
 	}
@@ -197,6 +214,7 @@
 			}
 			if(commit) writer.commit();
 		} finally {
+			wrote();
 			writeLock.unlock();
 		}
 	}
@@ -208,6 +226,7 @@
 			fn.call(luan);
 			if(commit) writer.commit();
 		} finally {
+			wrote();
 			writeLock.unlock();
 		}
 	}
@@ -252,6 +271,7 @@
 			doc.rawPut( "type", "next_id" );
 			doc.rawPut( FLD_NEXT_ID, idLim );
 			writer.updateDocument(new Term("type","next_id"),toLucene(luan,doc,Collections.EMPTY_SET));
+			wrote();
 		}
 		return id;
 	}
@@ -331,11 +351,15 @@
 	}
 
 	private synchronized IndexSearcher openSearcher() throws IOException {
-		DirectoryReader newReader = DirectoryReader.openIfChanged(reader);
-		if( newReader != null ) {
-			reader.decRef();
-			reader = newReader;
-			searcher = new IndexSearcher(reader);
+		int gwc = globalWriteCount();
+		if( writeCount != gwc ) {
+			writeCount = gwc;
+			DirectoryReader newReader = DirectoryReader.openIfChanged(reader);
+			if( newReader != null ) {
+				reader.decRef();
+				reader = newReader;
+				searcher = new IndexSearcher(reader);
+			}
 		}
 		reader.incRef();
 		return searcher;