diff --git a/addon/YaCy.app/Contents/Info.plist b/addon/YaCy.app/Contents/Info.plist
index c8ff85ef6..6ebb43566 100644
--- a/addon/YaCy.app/Contents/Info.plist
+++ b/addon/YaCy.app/Contents/Info.plist
@@ -25,7 +25,7 @@
 	<key>Java</key>
 	<dict>
 		<key>VMOptions</key>
-		<string>-Xmx600m -Xms180m -XX:MaxPermSize=256m -XX:-UseGCOverheadLimit -XX:+UseAdaptiveSizePolicy -Djava.net.preferIPv4Stack=true -Dfile.encoding=UTF-8</string>
+		<string>-Xmx600m -Xms180m -Xss256k -XX:MaxPermSize=256m -XX:ReservedCodeCacheSize=1024m -XX:-UseGCOverheadLimit -XX:+UseAdaptiveSizePolicy -Djava.net.preferIPv4Stack=true -Dfile.encoding=UTF-8</string>
 		<key>WorkingDirectory</key>
 		<string>$APP_PACKAGE/Contents/Resources/Java</string>
 		<key>MainClass</key>
diff --git a/startYACY.bat b/startYACY.bat
index b2e0b1ce8..7d3efb465 100644
--- a/startYACY.bat
+++ b/startYACY.bat
@@ -21,7 +21,7 @@ if exist DATA\SETTINGS\httpProxy.conf GoTo :RENAMEINDEX
 if exist DATA\SETTINGS\yacy.conf GoTo :GETSTARTOPTS
 
 :STARTJAVA
-set javacmd=%javacmd% -XX:-UseGCOverheadLimit -XX:+UseAdaptiveSizePolicy -Djava.net.preferIPv4Stack=true -Djava.awt.headless=true -Dfile.encoding=UTF-8
+set javacmd=%javacmd% -Xss256k -XX:MaxPermSize=256m -XX:ReservedCodeCacheSize=1024m -XX:-UseGCOverheadLimit -XX:+UseAdaptiveSizePolicy -Djava.net.preferIPv4Stack=true -Djava.awt.headless=true -Dfile.encoding=UTF-8
 Rem Starting YaCy
 Echo Generated classpath:%CLASSPATH%
 Echo JRE Parameters:%javacmd%
diff --git a/startYACY.sh b/startYACY.sh
index e5520a4e4..47f9adbe8 100755
--- a/startYACY.sh
+++ b/startYACY.sh
@@ -6,7 +6,7 @@ PIDFILE="yacy.pid"
 OS="`uname`"
 
 #get javastart args
-JAVA_ARGS="-server -XX:MaxPermSize=256m -XX:-UseGCOverheadLimit -XX:+UseAdaptiveSizePolicy -Djava.net.preferIPv4Stack=true -Djava.awt.headless=true -Dfile.encoding=UTF-8";
+JAVA_ARGS="-server -Xss256k -XX:MaxPermSize=256m -XX:ReservedCodeCacheSize=1024m -XX:-UseGCOverheadLimit -XX:+UseAdaptiveSizePolicy -Djava.net.preferIPv4Stack=true -Djava.awt.headless=true -Dfile.encoding=UTF-8";
 #JAVA_ARGS="-verbose:gc -XX:+PrintGCTimeStamps -XX:+PrintGCDetails $JAVA_ARGS";
 
 #check if OS is Sun Solaris or one of the OpenSolaris distributions and use different version of id if necessary