Re: Increasing Heap Size and Max Perm Size
The JVM actually recognises that the value being set/asked for is 100 as when I shut it down, I get a message saying that a JVM with the specified 100m of memory cannot be created. On Tue, Aug 18, 2009 at 11:48 PM, André Warnier a...@ice-sa.com wrote: Daniele Development-ML wrote: Hi all, I'm trying to increase the sizes of the heap and of the max perm by passing the options with the values (in catalina.sh) JAVA_OPTS=$JAVA_OPTS -Xmx=100m -XX:MaxPermSize=350m -Dfile.encoding=UTF-8 Try without the = signs ? -Xmx100m - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: Increasing Heap Size and Max Perm Size
Forgot to mention that when I try with the following command: java -Xms512m -Xmx750m it does succeed in creating the JVM - differently (but obviously), if I try: java -Xms512m -Xmx6750m it fails (as expected). I don't understand why I get different behaviour passing this option the JVM when starting Tomcat, and when I give directly to the JVM - I have tried this also with a simple Java main class that instantiates big arrays. Any hit/suggestions are very welcomed. Dan On Wed, Aug 19, 2009 at 11:05 AM, Daniele Development-ML daniele@googlemail.com wrote: The JVM actually recognises that the value being set/asked for is 100 as when I shut it down, I get a message saying that a JVM with the specified 100m of memory cannot be created. On Tue, Aug 18, 2009 at 11:48 PM, André Warnier a...@ice-sa.com wrote: Daniele Development-ML wrote: Hi all, I'm trying to increase the sizes of the heap and of the max perm by passing the options with the values (in catalina.sh) JAVA_OPTS=$JAVA_OPTS -Xmx=100m -XX:MaxPermSize=350m -Dfile.encoding=UTF-8 Try without the = signs ? -Xmx100m - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: Increasing Heap Size and Max Perm Size
Daniele Development-ML: Forgot to mention that when I try with the following command: java -Xms512m -Xmx750m it does succeed in creating the JVM [...] I don't understand why I get different behaviour passing this option the JVM when starting Tomcat, and when I give directly to the JVM From your OP: JAVA_OPTS=$JAVA_OPTS -Xmx=100m -XX:MaxPermSize=350m -Dfile.encoding=UTF-8 You get different behaviour because you're passing *different* options to the VM. Moreover, as you've been told by the VM and André, -Xmx=100m isn't a valid way to set the VM's maximum heap size. And BTW: instead of changing a Tomcat-provided script like catalina.sh to set your options you should create (or edit) setenv.sh and set the desired env vars there. -- Regards mks - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: Increasing Heap Size and Max Perm Size
Daniele Development-ML wrote: .. Just a detail about the usage of the list : when you respond, respond to the list only, unless specifically asked to post to the one person in particular. Since we are all subscribed to the list, we all get all the list messages anyway. If you in addition send to someone in particular, that person then gets the message twice, which is a mild annoyance. - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: Increasing Heap Size and Max Perm Size
Hey Chuck, I'm sure you are right - and that it was what I was following at the beginning. And the resulting situation was what I describe above: getting a error message in the catalina.out and my application unable to load (404 at the application URL). In addition to this, I got also an explicit (on the console) message reporting this problem when shutting down Tomcat. To understand it better, I ran jconsole locally and I could notice that the heap was not set as indicated in the option. Differently, when using it with the CATALINA_OPTS, things work and also jconsole indicates that the heap size is the one specifies - except that is converted in bytes - but it does match. I don't know why - and I'm not even sure how good (style-wise) this approach is - but I'm reporting my experience. If anybody could suggest some motivation or direction for investigation on this, I'm glad to try them. Dan On Wed, Aug 19, 2009 at 2:08 PM, Caldarale, Charles R chuck.caldar...@unisys.com wrote: From: Daniele Development-ML [mailto:daniele@googlemail.com] Subject: Re: Increasing Heap Size and Max Perm Size Practically, everything works when setting the above options through CATALINA_OPTS variable. Someone's confused. JAVA_OPTS works fine, but it affects both the startup and shutdown scripts. CATALINA_OPTS affects only the startup script. The last posting in the referenced article is incorrect. And despite your protestations, having an equals sign in the -Xmx parameter has never been allowed on a JVM supplied by Sun, and will cause an immediate JVM initialization failure. - Chuck THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all computers. - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: Increasing Heap Size and Max Perm Size
Daniele Development-ML wrote: Found a solution here: http://www.coderanch.com/t/85725/Tomcat/heap-space-setting-Tomcat-Linux http://www.coderanch.com/t/85725/Tomcat/heap-space-setting-Tomcat-LinuxPractically, everything works when setting the above options through CATALINA_OPTS variable. Daniele, a solution found here or there may work, and may still be a bad solution from an overall point of view. Modifying catalina.sh means that at the next Tomcat update, it will probably be lost, and you will wonder why something that worked with Tomcat 6.0.18 does not work anymore with 6.0.20, but I haven't changed anything !. The best place to set environment values is the Tomcat/bin/setenv.sh (create if not there), which does not get overwritten by a new Tomcat version, and is called (if it exists) by catalina.sh, here : if [ -r $CATALINA_BASE/bin/setenv.sh ]; then . $CATALINA_BASE/bin/setenv.sh elif [ -r $CATALINA_HOME/bin/setenv.sh ]; then . $CATALINA_HOME/bin/setenv.sh fi Now, in order to really see what happens, you need, on your platform, to look first at the script which starts Tomcat, probably /etc/init.d/tomcatxx. This script will do some setup, then probably call (tomcat_home)/bin/startup.sh, which in turn calls Tomcat_home/bin/catalina.sh, which in turn calls (tomcat_home)/bin/setenv.sh if it exists. read those scripts, understand what they are doing and when, and then put your environment vars in the right place. You cannot rely on some receipe written by someone on some forum for some particular situation, or on some receipe found in a book that was written 5 years ago for a version of Tomcat since unsupported. There is a standard file in the Tomcat distribution called RUNNING.txt. On my Debian system, it is in (tomcat_home)/docs. Depending on your Linux version, it may have been moved somewhere else. Regardless, it is a good place to start. In my Debian distribution, there is also, at the same location, a file called README.Debian, which explains in some detail how the Debian packager for Tomcat re-organised the Tomcat files, so that they fit better in the general Debian host setup logic. I would assume other distributions do the same. Read these files, they are full of precise and logical information. Unless you understand how it all works together, you are condemned to re-live the same kind of problems again each time you make a change, because you will probably make it in the wrong spot. - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Increasing Heap Size and Max Perm Size
Hi all, I'm trying to increase the sizes of the heap and of the max perm by passing the options with the values (in catalina.sh) JAVA_OPTS=$JAVA_OPTS -Xmx=100m -XX:MaxPermSize=350m -Dfile.encoding=UTF-8 but the VM cannot be created and from the catalina.out file I get this printout: Invalid maximum heap size: -Xmx=100m Could not create the Java virtual machine. The Tomcat home page can be accessed (port number 8080), but the home page of my application gives the following error: “localhost” refused the connection. Likely causes of the problem are * the service http-alt isn't started. Try to start it using the Services Configuration Tool in System Control Centre, or * the port number 8080 is wrong. Any hints/suggestions about this are much appreciated. My OS is Debian Linux. Thanks! Dan
Re: Increasing Heap Size and Max Perm Size
the system actually gave you the answer: Invalid maximum heap size: -Xmx=100m Could not create the Java virtual machine. If you are going to give the PermSpace 350M, you must have a lot of memory, so giving half gb for heap won't heart: JAVA_OPTS=$JAVA_OPTS -Xmx=512m -XX:MaxPermSize=350m -Dfile.encoding=UTF-8 regards Leon (Of course you can give less memory, like 256m or 128m). On Tue, Aug 18, 2009 at 8:48 PM, Daniele Development-MLdaniele@googlemail.com wrote: Hi all, I'm trying to increase the sizes of the heap and of the max perm by passing the options with the values (in catalina.sh) JAVA_OPTS=$JAVA_OPTS -Xmx=100m -XX:MaxPermSize=350m -Dfile.encoding=UTF-8 but the VM cannot be created and from the catalina.out file I get this printout: Invalid maximum heap size: -Xmx=100m Could not create the Java virtual machine. The Tomcat home page can be accessed (port number 8080), but the home page of my application gives the following error: “localhost” refused the connection. Likely causes of the problem are * the service http-alt isn't started. Try to start it using the Services Configuration Tool in System Control Centre, or * the port number 8080 is wrong. Any hints/suggestions about this are much appreciated. My OS is Debian Linux. Thanks! Dan - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: Increasing Heap Size and Max Perm Size
Daniele Development-ML wrote: Hi all, I'm trying to increase the sizes of the heap and of the max perm by passing the options with the values (in catalina.sh) JAVA_OPTS=$JAVA_OPTS -Xmx=100m -XX:MaxPermSize=350m -Dfile.encoding=UTF-8 Try without the = signs ? -Xmx100m - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
