Am Mon, 9 Aug 2010 04:52:55 -0700 (PDT) schrieb Angelo Chen <angelochen...@yahoo.com.hk>:
> > the standard tomcat(apache-tomcat-6.0.20.tar.gz) is running in a 64 > bit version of Centos. so can my app use memory bigger than 4G? I Which JVM-version does your Tomcat use? IIRC there are different defaults for different versions of CentOS. Maybe "yum list installed |grep ^java" or "yum list installed |grep ^jdk" helps. I would download last JDK for Linux/x64 at http://java.sun.com/javase/downloads/index.jsp, install it and set the correct path, for example: "JAVA_HOME=/usr/jdk/latest;export JAVA_HOME" before starting Tomcat. Maybe defaults of JVM have changed but AFAIK you have to set some additional JAVA_OPTS-parameters to use 64bit and more RAM. We are using a scriptlet like the following on our larger machines as part of the catalina.sh or start-stop-wrapper for catalina.sh: ------------------------schnipp------------------------ JAVA_OPTS="$JAVA_OPTS "-server JAVA_OPTS="$JAVA_OPTS "-d64 # Speicherlimit nur bei Aufruf von run, debug oder start auf 3 GB oder mehr hochsetzen case "$1" in start|run|debug) # Fuer 32-Bit-Betrieb die naechsten beiden Zeilen auf 3072k aendern JAVA_OPTS="$JAVA_OPTS "-Xms6000m JAVA_OPTS="$JAVA_OPTS "-Xmx11000m ;; stop) JAVA_OPTS="$JAVA_OPTS "-Xms600m JAVA_OPTS="$JAVA_OPTS "-Xmx600m ;; esac ------------------------schnipp------------------------ > believe the 2G is the limit for 32 bit version of Linux. 3GB is a possible limit for 32bit. Regards, Tobias. --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
