diff --git a/source/de/anomic/index/indexWord.java b/source/de/anomic/index/indexWord.java
index 4eb5d9940..1070e180a 100644
--- a/source/de/anomic/index/indexWord.java
+++ b/source/de/anomic/index/indexWord.java
@@ -26,8 +26,8 @@
 
 package de.anomic.index;
 
+import java.util.HashMap;
 import java.util.HashSet;
-import java.util.Hashtable;
 import java.util.Iterator;
 import java.util.Locale;
 import java.util.Set;
@@ -40,13 +40,14 @@ import de.anomic.yacy.yacySeedDB;
 
 public class indexWord {
 
-    // object carries statistics for words and sentences
+    private static final HashMap<String, String> hashCache = new HashMap<String, String>(1000);
     
-    public  int              count;       // number of occurrences
-    public  int              posInText;   // unique handle, is initialized with word position (excluding double occurring words)
-    public  int              posInPhrase; // position of word in phrase
-    public  int              numOfPhrase; // number of phrase. 'normal' phrases begin with number 100
-    HashSet<Integer>         phrases;        // a set of handles to all phrases where this word appears
+    // object carries statistics for words and sentences
+    public  int      count;       // number of occurrences
+    public  int      posInText;   // unique handle, is initialized with word position (excluding double occurring words)
+    public  int      posInPhrase; // position of word in phrase
+    public  int      numOfPhrase; // number of phrase. 'normal' phrases begin with number 100
+    HashSet<Integer> phrases;     // a set of handles to all phrases where this word appears
     public  Bitfield flags;       // the flag bits for each word
 
     public indexWord(final int handle, final int pip, final int nop) {
@@ -78,13 +79,15 @@ public class indexWord {
     // static methods
 
     // create a word hash
-    private static final Hashtable<String, String> hashCache = new Hashtable<String, String>();
     public static final String word2hash(final String word) {
         String h = hashCache.get(word);
         if (h != null) return h;
         h = Base64Order.enhancedCoder.encode(Digest.encodeMD5Raw(word.toLowerCase(Locale.ENGLISH))).substring(0, yacySeedDB.commonHashLength);
         hashCache.put(word, h); // prevent expensive MD5 computation and encoding
-        if (hashCache.size() > 100000) hashCache.clear(); // prevent memory laeak
+        if (hashCache.size() > 20000) {
+            // prevent memory leak
+            hashCache.clear();
+        }
         return h;
     }
     
diff --git a/source/de/anomic/plasma/plasmaSearchEvent.java b/source/de/anomic/plasma/plasmaSearchEvent.java
index fc24fb50b..94c33baca 100644
--- a/source/de/anomic/plasma/plasmaSearchEvent.java
+++ b/source/de/anomic/plasma/plasmaSearchEvent.java
@@ -42,6 +42,7 @@ import de.anomic.index.indexRWIEntry;
 import de.anomic.index.indexRWIVarEntry;
 import de.anomic.index.indexURLReference;
 import de.anomic.kelondro.order.Bitfield;
+import de.anomic.kelondro.util.MemoryControl;
 import de.anomic.kelondro.util.SetTools;
 import de.anomic.kelondro.util.SortStack;
 import de.anomic.kelondro.util.SortStore;
@@ -66,7 +67,7 @@ public final class plasmaSearchEvent {
     public static int workerThreadCount = 10;
     public static String lastEventID = "";
     private static ConcurrentHashMap<String, plasmaSearchEvent> lastEvents = new ConcurrentHashMap<String, plasmaSearchEvent>(); // a cache for objects from this class: re-use old search requests
-    public static final long eventLifetime = 600000; // the time an event will stay in the cache, 10 Minutes
+    public static final long eventLifetime = 60000; // the time an event will stay in the cache, 1 Minute
     private static final int max_results_preparation = 300;
     
     private long eventTime;
@@ -215,6 +216,7 @@ public final class plasmaSearchEvent {
         serverProfiling.update("SEARCH", new plasmaProfiling.searchEvent(query.id(true), "event-cleanup", 0, 0));
         
         // store this search to a cache so it can be re-used
+        if (MemoryControl.available() < 1024 * 1024 * 10) cleanupEvents(true);
         lastEventID = query.id(false);
         lastEvents.put(lastEventID, this);
     }
diff --git a/source/de/anomic/yacy/logging/ConsoleOutErrHandler.java b/source/de/anomic/yacy/logging/ConsoleOutErrHandler.java
index fe7bbe75f..c0edfe160 100644
--- a/source/de/anomic/yacy/logging/ConsoleOutErrHandler.java
+++ b/source/de/anomic/yacy/logging/ConsoleOutErrHandler.java
@@ -135,6 +135,7 @@ public final class ConsoleOutErrHandler extends Handler {
         } else {
             this.stdOutHandler.publish(record);
         }
+        flush();
     }
 
     public void flush() {
diff --git a/source/de/anomic/yacy/logging/GuiHandler.java b/source/de/anomic/yacy/logging/GuiHandler.java
index 76d2f655f..045d453a7 100644
--- a/source/de/anomic/yacy/logging/GuiHandler.java
+++ b/source/de/anomic/yacy/logging/GuiHandler.java
@@ -126,7 +126,8 @@ public class GuiHandler extends Handler {
             this.count++;
         } else {
             this.start++;
-        }     
+        }
+        flush();
     }
     
     public synchronized LogRecord[] getLogArray() {
diff --git a/source/de/anomic/yacy/logging/LogalizerHandler.java b/source/de/anomic/yacy/logging/LogalizerHandler.java
index a7a88577c..4c4b78eb1 100644
--- a/source/de/anomic/yacy/logging/LogalizerHandler.java
+++ b/source/de/anomic/yacy/logging/LogalizerHandler.java
@@ -131,6 +131,7 @@ public class LogalizerHandler extends Handler {
                 if (debug) System.out.println("Logalizertest: " + returnV + " --- " + record.getLevel());
             }
         }
+        flush();
     }
     
     public Set<String> getParserNames() {
diff --git a/source/de/anomic/yacy/yacyURL.java b/source/de/anomic/yacy/yacyURL.java
index 3ac2a72c1..5bfc8cb77 100644
--- a/source/de/anomic/yacy/yacyURL.java
+++ b/source/de/anomic/yacy/yacyURL.java
@@ -47,6 +47,7 @@ public class yacyURL implements Serializable {
      */
     private static final long serialVersionUID = -1173233022912141884L;
     public  static final int TLD_any_zone_filter = 255; // from TLD zones can be filtered during search; this is the catch-all filter
+    private final static Pattern backPathPattern = Pattern.compile("(/[^/]+(?<!/\\.{1,2})/)[.]{2}(?=/|$)|/\\.(?=/)|/(?=/)");
     
     // class variables
     private String protocol, host, userInfo, path, quest, ref, hash;
@@ -233,7 +234,6 @@ public class yacyURL implements Serializable {
         escape();
     }
 
-    private final Pattern backPathPattern = Pattern.compile("(/[^/]+(?<!/\\.{1,2})/)[.]{2}(?=/|$)|/\\.(?=/)|/(?=/)");
     
     //  resolve '..'
     String resolveBackpath(String path) /* throws MalformedURLException */ {