setting startup options:

-Xss256k
and
-XX:ReservedCodeCacheSize=1024m 
after appearance of a malloc error together with a crash of the jvm which stated at the end of the log:

# There is insufficient memory for the Java Runtime Environment to continue.
# Native memory allocation (malloc) failed to allocate 32756 bytes for ChunkPool::allocate
# Possible reasons:
#   The system is out of physical RAM or swap space
#   In 32 bit mode, the process size limit was hit
# Possible solutions:
#   Reduce memory load on the system
#   Increase physical memory or swap space
#   Check if swap backing store is full
#   Use 64 bit Java on a 64 bit OS
#   Decrease Java heap size (-Xmx/-Xms)
#   Decrease number of Java threads
#   Decrease Java thread stack sizes (-Xss)
#   Set larger code cache with -XX:ReservedCodeCacheSize=

this follows the last two points in the list of recommendations. To set appropriate values the default values from
http://www.oracle.com/technetwork/java/hotspotfaq-138619.html
and 
http://www.oracle.com/technetwork/java/javase/tech/vmoptions-jsp-140102.html
had been considered

git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@7823 6c8d7289-2bf4-0310-a012-ef5d649a1542

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>

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%

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