diff --git a/source/dbtest.java b/source/dbtest.java
index b76ffb435..1bfc24d94 100644
--- a/source/dbtest.java
+++ b/source/dbtest.java
@@ -528,7 +528,7 @@ final class dbTable implements kelondroIndex {
 
     public synchronized void putMultiple(List rows, Date entryDate) throws IOException {
         Iterator i = rows.iterator();
-        while (i.hasNext()) put ((Entry) i.next(), entryDate);
+        while (i.hasNext()) put((Entry) i.next(), entryDate);
     }
     
     public kelondroRow.Entry put(kelondroRow.Entry row, Date entryDate) throws IOException {
@@ -571,6 +571,10 @@ final class dbTable implements kelondroIndex {
         throw new UnsupportedOperationException();
     }
     
+    public synchronized void addUniqueMultiple(List rows, Date entryDate) throws IOException {
+        throw new UnsupportedOperationException();
+    }
+    
     public kelondroRow.Entry remove(byte[] key) throws IOException {
         try {
             
diff --git a/source/de/anomic/kelondro/kelondroCache.java b/source/de/anomic/kelondro/kelondroCache.java
index 8dfe83b20..1d36b7b25 100644
--- a/source/de/anomic/kelondro/kelondroCache.java
+++ b/source/de/anomic/kelondro/kelondroCache.java
@@ -539,6 +539,11 @@ public class kelondroCache implements kelondroIndex {
             if (dummy == null) this.writeUnique++; else this.writeDouble++;
         }
     }
+    
+    public synchronized void addUniqueMultiple(List rows, Date entryDate) throws IOException {
+        Iterator i = rows.iterator();
+        while (i.hasNext()) addUnique((Entry) i.next(), entryDate);
+    }
 
     public synchronized Entry remove(byte[] key) throws IOException {
         
diff --git a/source/de/anomic/kelondro/kelondroCollectionIndex.java b/source/de/anomic/kelondro/kelondroCollectionIndex.java
index 6f9a20349..fe84ae3a8 100644
--- a/source/de/anomic/kelondro/kelondroCollectionIndex.java
+++ b/source/de/anomic/kelondro/kelondroCollectionIndex.java
@@ -278,11 +278,23 @@ public class kelondroCollectionIndex {
         return 2 * m * this.payloadrow.objectsize;
     }
     
-    private kelondroRow.Entry array_new(byte[] key, kelondroRowCollection collection) throws IOException {
+    private void array_remove(
+            int oldPartitionNumber, int serialNumber, int chunkSize,
+            int oldRownumber) throws IOException {
+        // we need a new slot, that means we must first delete the old entry
+        // find array file
+        kelondroFixedWidthArray array = getArray(oldPartitionNumber, serialNumber, chunkSize);
+
+        // delete old entry
+        array.remove(oldRownumber, true);
+    }
+    
+    private kelondroRow.Entry array_new(
+            byte[] key, kelondroRowCollection collection) throws IOException {
         // the collection is new
-        int newPartitionNumber = arrayIndex(collection.size());
+        int partitionNumber = arrayIndex(collection.size());
         kelondroRow.Entry indexrow = index.row().newEntry();
-        kelondroFixedWidthArray array = getArray(newPartitionNumber, serialNumber, this.payloadrow.objectsize());
+        kelondroFixedWidthArray array = getArray(partitionNumber, serialNumber, this.payloadrow.objectsize());
 
         // define row
         kelondroRow.Entry arrayEntry = array.row().newEntry();
@@ -296,7 +308,7 @@ public class kelondroCollectionIndex {
         indexrow.setCol(idx_col_key, key);
         indexrow.setCol(idx_col_chunksize, this.payloadrow.objectsize());
         indexrow.setCol(idx_col_chunkcount, collection.size());
-        indexrow.setCol(idx_col_clusteridx, (byte) newPartitionNumber);
+        indexrow.setCol(idx_col_clusteridx, (byte) partitionNumber);
         indexrow.setCol(idx_col_flags, (byte) 0);
         indexrow.setCol(idx_col_indexpos, (long) newRowNumber);
         indexrow.setCol(idx_col_lastread, kelondroRowCollection.daysSince2000(System.currentTimeMillis()));
@@ -306,17 +318,6 @@ public class kelondroCollectionIndex {
         return indexrow;
     }
     
-    private void array_remove(
-            int oldPartitionNumber, int serialNumber, int chunkSize,
-            int oldRownumber) throws IOException {
-        // we need a new slot, that means we must first delete the old entry
-        // find array file
-        kelondroFixedWidthArray array = getArray(oldPartitionNumber, serialNumber, chunkSize);
-
-        // delete old entry
-        array.remove(oldRownumber, true);
-    }
-    
     private void array_add(
             byte[] key, kelondroRowCollection collection, kelondroRow.Entry indexrow,
             int partitionNumber, int serialNumber, int chunkSize) throws IOException {
@@ -450,7 +451,7 @@ public class kelondroCollectionIndex {
         // merge existing containers
         i = existingContainer.iterator();
         Object[] record;
-        ArrayList indexrows = new ArrayList();
+        ArrayList indexrows_existing = new ArrayList();
         kelondroRowCollection collection;
         while (i.hasNext()) {
             record = (Object[]) i.next(); // {byte[], indexContainer, kelondroRow.Entry}
@@ -495,21 +496,23 @@ public class kelondroCollectionIndex {
                         newPartitionNumber, oldSerialNumber, this.payloadrow.objectsize()); // modifies indexrow
             }
             arrayResolveRemoved(); // remove all to-be-removed marked entries
-            indexrows.add(indexrow); // indexrows are collected and written later as block
+            indexrows_existing.add(indexrow); // indexrows are collected and written later as block
         }
         
         // write new containers
         i = newContainer.iterator();
+        ArrayList indexrows_new = new ArrayList();
         while (i.hasNext()) {
             record = (Object[]) i.next(); // {byte[], indexContainer}
             key = (byte[]) record[0];
             collection = (indexContainer) record[1];
             indexrow = array_new(key, collection); // modifies indexrow
-            index.addUnique(indexrow); // write modified indexrow
+            indexrows_new.add(indexrow); // collect new index rows
         }
         
         // write index entries
-        index.putMultiple(indexrows, new Date()); // write modified indexrows in optimized manner
+        index.putMultiple(indexrows_existing, new Date()); // write modified indexrows in optimized manner
+        index.addUniqueMultiple(indexrows_new, new Date()); // write new indexrows in optimized manner
     }
     
     public synchronized void merge(indexContainer container) throws IOException, kelondroOutOfLimitsException {
diff --git a/source/de/anomic/kelondro/kelondroFixedWidthArray.java b/source/de/anomic/kelondro/kelondroFixedWidthArray.java
index e07f20007..068a94c38 100644
--- a/source/de/anomic/kelondro/kelondroFixedWidthArray.java
+++ b/source/de/anomic/kelondro/kelondroFixedWidthArray.java
@@ -49,6 +49,8 @@ package de.anomic.kelondro;
 import java.io.File;
 import java.io.IOException;
 import java.util.Iterator;
+import java.util.Map;
+import java.util.TreeMap;
 import java.util.TreeSet;
 
 public class kelondroFixedWidthArray extends kelondroRecords implements kelondroArray {
@@ -114,6 +116,15 @@ public class kelondroFixedWidthArray extends kelondroRecords implements kelondro
         // the OHbytes and OHhandles are zero.
     }
     
+    public synchronized void setMultiple(TreeMap /* of Integer/kelondroRow.Entry */ rows) throws IOException {
+        Iterator i = rows.entrySet().iterator();
+        Map.Entry entry;
+        while (i.hasNext()) {
+            entry = (Map.Entry) i.next();
+            set(((Integer) entry.getKey()).intValue(), (kelondroRow.Entry) entry.getValue());
+        }
+    }
+    
     public synchronized kelondroRow.Entry get(int index) throws IOException {
         return row().newEntry(getNode(new Handle(index), true).getValueRow());
     }
diff --git a/source/de/anomic/kelondro/kelondroFlexSplitTable.java b/source/de/anomic/kelondro/kelondroFlexSplitTable.java
index 2aa280f82..9ad321725 100644
--- a/source/de/anomic/kelondro/kelondroFlexSplitTable.java
+++ b/source/de/anomic/kelondro/kelondroFlexSplitTable.java
@@ -239,6 +239,11 @@ public class kelondroFlexSplitTable implements kelondroIndex {
         table.addUnique(row, entryDate);
     }
     
+    public synchronized void addUniqueMultiple(List rows, Date entryDate) throws IOException {
+        Iterator i = rows.iterator();
+        while (i.hasNext()) addUnique((kelondroRow.Entry) i.next(), entryDate);
+    }
+    
     public synchronized kelondroRow.Entry remove(byte[] key) throws IOException {
         Iterator i = tables.values().iterator();
         kelondroIndex table;
diff --git a/source/de/anomic/kelondro/kelondroFlexTable.java b/source/de/anomic/kelondro/kelondroFlexTable.java
index 4cc4ed455..2957f8e38 100644
--- a/source/de/anomic/kelondro/kelondroFlexTable.java
+++ b/source/de/anomic/kelondro/kelondroFlexTable.java
@@ -27,9 +27,11 @@ package de.anomic.kelondro;
 
 import java.io.File;
 import java.io.IOException;
+import java.util.ArrayList;
 import java.util.Date;
 import java.util.Iterator;
 import java.util.List;
+import java.util.Map;
 import java.util.TreeMap;
 
 import de.anomic.server.logging.serverLog;
@@ -187,20 +189,25 @@ public class kelondroFlexTable extends kelondroFlexWidthArray implements kelondr
         // this should save R/W head positioning time
         Iterator i = rows.iterator();
         kelondroRow.Entry row;
-        TreeMap ordered = new TreeMap();
         int pos;
         byte[] key;
+        TreeMap   old_rows_ordered    = new TreeMap();
+        ArrayList new_rows_sequential = new ArrayList();
         while (i.hasNext()) {
             row = (kelondroRow.Entry) i.next();
             key = row.getColBytes(0);
             pos = index.geti(key);
             if (pos < 0) {
-                index.puti(key, super.add(row));
+                new_rows_sequential.add(row);
             } else {
-                ordered.put(new Integer(pos), row);
+                old_rows_ordered.put(new Integer(pos), row);
             }
         }
-        super.setMultiple(ordered);
+        // overwrite existing entries in index
+        super.setMultiple(old_rows_ordered);
+        
+        // write new entries to index
+        addUniqueMultiple(new_rows_sequential, entryDate);
     }
 
     public synchronized kelondroRow.Entry put(kelondroRow.Entry row, Date entryDate) throws IOException {
@@ -230,6 +237,20 @@ public class kelondroFlexTable extends kelondroFlexWidthArray implements kelondr
         index.addi(row.getColBytes(0), super.add(row));
     }
     
+    public synchronized void addUniqueMultiple(List rows, Date entryDate) throws IOException {
+        // add a list of entries in a ordered way.
+        // this should save R/W head positioning time
+        TreeMap indexed_result = super.addMultiple(rows);
+        // indexed_result is a Integer/byte[] relation
+        // that is used here to store the index
+        Iterator i = indexed_result.entrySet().iterator();
+        Map.Entry entry;
+        while (i.hasNext()) {
+            entry = (Map.Entry) i.next();
+            index.puti((byte[]) entry.getValue(), ((Integer) entry.getKey()).intValue());
+        }
+    }
+    
     public synchronized kelondroRow.Entry remove(byte[] key) throws IOException {
         int i = index.removei(key);
         if (i < 0) return null;
diff --git a/source/de/anomic/kelondro/kelondroFlexWidthArray.java b/source/de/anomic/kelondro/kelondroFlexWidthArray.java
index 26c0d9005..bac64972f 100644
--- a/source/de/anomic/kelondro/kelondroFlexWidthArray.java
+++ b/source/de/anomic/kelondro/kelondroFlexWidthArray.java
@@ -29,6 +29,7 @@ import java.io.File;
 import java.io.IOException;
 import java.util.HashMap;
 import java.util.Iterator;
+import java.util.List;
 import java.util.Map;
 import java.util.TreeMap;
 
@@ -188,7 +189,7 @@ public class kelondroFlexWidthArray implements kelondroArray {
         // a R/W head path-optimized option to write a set of entries
         Iterator i;
         Map.Entry entry;
-        kelondroRow.Entry rowentry, e0;
+        kelondroRow.Entry rowentry, e;
         int c = 0, index, lastcol;
         synchronized (col) {
             // go across each file
@@ -201,11 +202,11 @@ public class kelondroFlexWidthArray implements kelondroArray {
                     rowentry = (kelondroRow.Entry) entry.getValue();
                     assert rowentry.bytes().length == this.rowdef.objectsize;
                         
-                    e0 = col[c].row().newEntry(
+                    e = col[c].row().newEntry(
                             rowentry.bytes(),
                             rowdef.colstart[c],
                             rowdef.colstart[lastcol] - rowdef.colstart[c] + rowdef.width(lastcol));
-                    col[c].set(index, e0);             
+                    col[c].set(index, e);             
                 }
                 c = c + col[c].row().columns();   
             }
@@ -215,16 +216,16 @@ public class kelondroFlexWidthArray implements kelondroArray {
     public void set(int index, kelondroRow.Entry rowentry) throws IOException {
         assert rowentry.bytes().length == this.rowdef.objectsize;
         int c = 0;
-        kelondroRow.Entry e0;
+        kelondroRow.Entry e;
         int lastcol;
         synchronized (col) {
             while (c < rowdef.columns()) {
                 lastcol = c + col[c].row().columns() - 1;
-                e0 = col[c].row().newEntry(
+                e = col[c].row().newEntry(
                         rowentry.bytes(),
                         rowdef.colstart[c],
                         rowdef.colstart[lastcol] - rowdef.colstart[c] + rowdef.width(lastcol));
-                col[c].set(index, e0);
+                col[c].set(index, e);
                 c = c + col[c].row().columns();
             }
         }
@@ -246,13 +247,58 @@ public class kelondroFlexWidthArray implements kelondroArray {
                         rowentry.bytes(),
                         rowdef.colstart[c],
                         rowdef.colstart[lastcol] + rowdef.width(lastcol) - rowdef.colstart[c]);
-                col[c].set(index,e);
+                col[c].set(index, e);
                 c = c + col[c].row().columns();
             }
         }
         return index;
     }
 
+    protected TreeMap addMultiple(List rows) throws IOException {
+        // result is a Integer/byte[] relation
+        // of newly added rows (index, key)
+        TreeMap indexref = new TreeMap();
+        Iterator i;
+        kelondroRow.Entry rowentry;
+        // prepare storage for other columns
+        TreeMap[] colm = new TreeMap[col.length];
+        for (int j = 0; j < col.length; j++) {
+            if (col[j] == null) colm[j] = null; else colm[j] = new TreeMap();
+        }
+        i = rows.iterator();
+        while (i.hasNext()) {
+            rowentry = (kelondroRow.Entry) i.next();
+            assert rowentry.bytes().length == this.rowdef.objectsize;
+            
+            kelondroRow.Entry e;
+            int index = -1;
+            int lastcol;
+            synchronized (col) {
+                e = col[0].row().newEntry(rowentry.bytes(), 0, rowdef.width(0));
+                index = col[0].add(e);
+                int c = col[0].row().columns();
+
+                while (c < rowdef.columns()) {
+                    lastcol = c + col[c].row().columns() - 1;
+                    e = col[c].row().newEntry(
+                            rowentry.bytes(),
+                            rowdef.colstart[c],
+                            rowdef.colstart[lastcol] + rowdef.width(lastcol) - rowdef.colstart[c]);
+                    // remember write to column, but do not write directly
+                    colm[c].put(new Integer(index), e); // col[c].set(index,e);
+                    c = c + col[c].row().columns();
+                }
+            }
+            indexref.put(new Integer(index), rowentry.getColBytes(0));
+        }
+        // write the other columns
+        for (int j = 1; j < col.length; j++) {
+            if (col[j] != null) col[j].setMultiple(colm[j]);
+        }
+        // retrun references to entries with key
+        return indexref;
+    }
+    
     public kelondroRow.Entry get(int index) throws IOException {
         int r = 0;
         kelondroRow.Entry e, p;
diff --git a/source/de/anomic/kelondro/kelondroIndex.java b/source/de/anomic/kelondro/kelondroIndex.java
index b98aadd41..df884fc5a 100644
--- a/source/de/anomic/kelondro/kelondroIndex.java
+++ b/source/de/anomic/kelondro/kelondroIndex.java
@@ -67,6 +67,7 @@ public interface kelondroIndex {
     public void putMultiple(List /* of kelondroRow.Entry*/ rows, Date entryDate) throws IOException; // for R/W head path optimization
     public void addUnique(kelondroRow.Entry row) throws IOException; // no double-check
     public void addUnique(kelondroRow.Entry row, Date entryDate) throws IOException; // no double-check
+    public void addUniqueMultiple(List /* of kelondroRow.Entry*/ rows, Date entryDate) throws IOException; // no double-check
     public kelondroRow.Entry remove(byte[] key) throws IOException;
     public kelondroRow.Entry removeOne() throws IOException;
     public Iterator rows(boolean up, boolean rotating, byte[] firstKey) throws IOException;
diff --git a/source/de/anomic/kelondro/kelondroRowCollection.java b/source/de/anomic/kelondro/kelondroRowCollection.java
index 7e8963737..1016453b7 100644
--- a/source/de/anomic/kelondro/kelondroRowCollection.java
+++ b/source/de/anomic/kelondro/kelondroRowCollection.java
@@ -24,8 +24,10 @@
 
 package de.anomic.kelondro;
 
+import java.io.IOException;
 import java.util.Date;
 import java.util.Iterator;
+import java.util.List;
 import java.util.Set;
 
 import de.anomic.server.logging.serverLog;
@@ -216,6 +218,11 @@ public class kelondroRowCollection {
         addUnique(row);
     }
 
+    public synchronized void addUniqueMultiple(List rows, Date entryDate) throws IOException {
+        Iterator i = rows.iterator();
+        while (i.hasNext()) addUnique((kelondroRow.Entry) i.next());
+    }
+    
     public void add(byte[] a) {
         addUnique(a, 0, a.length);
     }
diff --git a/source/de/anomic/kelondro/kelondroRowSet.java b/source/de/anomic/kelondro/kelondroRowSet.java
index 8335667a8..69de6e4a3 100644
--- a/source/de/anomic/kelondro/kelondroRowSet.java
+++ b/source/de/anomic/kelondro/kelondroRowSet.java
@@ -31,7 +31,6 @@ import java.util.List;
 import java.util.Random;
 import java.util.TreeMap;
 
-import de.anomic.kelondro.kelondroRow.Entry;
 import de.anomic.server.logging.serverLog;
 
 public class kelondroRowSet extends kelondroRowCollection implements kelondroIndex {
@@ -102,9 +101,18 @@ public class kelondroRowSet extends kelondroRowCollection implements kelondroInd
         }
     }
     
+    public void addUniqueMultiple(List rows, Date entryDate) throws IOException {
+        if (removeMarker.size() == 0) {
+            super.addUniqueMultiple(rows, entryDate);
+        } else {
+            Iterator i = rows.iterator();
+            while (i.hasNext()) addUnique((kelondroRow.Entry) i.next(), entryDate);
+        }
+    }
+    
     public synchronized void putMultiple(List rows, Date entryDate) throws IOException {
         Iterator i = rows.iterator();
-        while (i.hasNext()) put ((Entry) i.next(), entryDate);
+        while (i.hasNext()) put((kelondroRow.Entry) i.next(), entryDate);
     }
     
     public kelondroRow.Entry put(kelondroRow.Entry row, Date entryDate) {
diff --git a/source/de/anomic/kelondro/kelondroSplittedTree.java b/source/de/anomic/kelondro/kelondroSplittedTree.java
index 4047a63ae..ce2576294 100644
--- a/source/de/anomic/kelondro/kelondroSplittedTree.java
+++ b/source/de/anomic/kelondro/kelondroSplittedTree.java
@@ -139,6 +139,10 @@ public class kelondroSplittedTree implements kelondroIndex {
         throw new UnsupportedOperationException();
     }
     
+    public synchronized void addUniqueMultiple(List rows, Date entryDate) throws IOException {
+        throw new UnsupportedOperationException();
+    }
+    
     public kelondroRow.Entry put(kelondroRow.Entry row) throws IOException {
         return ktfs[partition(row.getColBytes(0))].put(row);
     }
@@ -274,4 +278,5 @@ public class kelondroSplittedTree implements kelondroIndex {
         // a collection of different node cache status values
         return new int[]{0,0,0,0,0,0,0,0,0,0};
     }
+
 }
diff --git a/source/de/anomic/kelondro/kelondroTree.java b/source/de/anomic/kelondro/kelondroTree.java
index 37274a24c..67bee31a3 100644
--- a/source/de/anomic/kelondro/kelondroTree.java
+++ b/source/de/anomic/kelondro/kelondroTree.java
@@ -486,6 +486,11 @@ public class kelondroTree extends kelondroRecords implements kelondroIndex {
         this.put(row, entryDate);
     }
     
+    public synchronized void addUniqueMultiple(List rows, Date entryDate) throws IOException {
+        Iterator i = rows.iterator();
+        while (i.hasNext()) addUnique((kelondroRow.Entry) i.next(), entryDate);
+    }
+    
     private void assignChild(Node parentNode, Node childNode, int childType) throws IOException {
         parentNode.setOHHandle(childType, childNode.handle());
         childNode.setOHHandle(parent, parentNode.handle());
diff --git a/source/de/anomic/plasma/plasmaSwitchboard.java b/source/de/anomic/plasma/plasmaSwitchboard.java
index d23ad82a0..36b86791a 100644
--- a/source/de/anomic/plasma/plasmaSwitchboard.java
+++ b/source/de/anomic/plasma/plasmaSwitchboard.java
@@ -1018,6 +1018,7 @@ public final class plasmaSwitchboard extends serverAbstractSwitch implements ser
 
         int wordInCacheMaxCount = (int) getConfigLong(INDEX_DIST_DHT_RECEIPT_LIMIT, 1000);
         wordIndex.setInMaxWordCount(wordInCacheMaxCount);
+        wordIndex.setWordFlushSize((int) getConfigLong("wordFlushSize", 1000));
         
         // set a minimum amount of memory for the indexer thread
         setConfig(INDEXER_MEMPREREQ, Math.max(getConfigLong(INDEXER_MEMPREREQ, 0), wordIndex.minMem()));
diff --git a/yacy.init b/yacy.init
index d620488eb..41ccea82e 100644
--- a/yacy.init
+++ b/yacy.init
@@ -590,7 +590,7 @@ javastart_priority=0
 # flushed to disc; this may last some minutes.
 wordCacheMaxCount = 20000
 wordCacheInitCount = 30000
-wordFlushSize = 2000;
+wordFlushSize = 1000;
 
 # Specifies if yacy can be used as transparent http proxy.
 #