AppletTalk.com Java discussions newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  Display Default Heap Size          AppletTalk.com Forum Index -> JVM, native methods and hardware View previous topic :: View next topic   Author Message Guest Posted: Thu Sep 21, 2006 12:16 am    Post subject: Display Default Heap Size Hi all - I've scoured the internet for this and can't find any helpful information. Is there any way for the JVM to display the default maximum heap size on a system? I can't seem to figure out what it is using as its maximum value, if I don't manually override it with -Xmx. Any help would be really appreciated. Thanks - Aaron Back to top Ian Shef Guest Posted: Thu Sep 21, 2006 12:52 am    Post subject: Re: Display Default Heap Size apiccirilli (AT) gmail (DOT) com wrote in news:1158779800.453216.194170 @b28g2000cwb.googlegroups.com: Quote: Hi all - I've scoured the internet for this and can't find any helpful information. Is there any way for the JVM to display the default maximum heap size on a system? I can't seem to figure out what it is using as its maximum value, if I don't manually override it with -Xmx. Any help would be really appreciated. Thanks - Aaron The javadocs are your friend! It is documented in the javadoc for the tool "java". For Windows, see: http://java.sun.com/j2se/1.5.0/docs/tooldocs/windows/java.html For Linux and Solaris, see: http://java.sun.com/j2se/1.5.0/docs/tooldocs/solaris/java.html If you don't believe the javadocs and have to see it for yourself... With JDK version 1.5, you can use jconsole (also in the tool javadocs) to provide the current and maximum heap size of a running VM. -- Ian Shef 805/F6 * These are my personal opinions Raytheon Company * and not those of my employer. PO Box 11337 * Tucson, AZ 85734-1337 * Back to top Guest Posted: Thu Sep 21, 2006 1:11 am    Post subject: Re: Display Default Heap Size Ian Shef wrote: Quote: apiccirilli (AT) gmail (DOT) com wrote in news:1158779800.453216.194170 @b28g2000cwb.googlegroups.com: Hi all - I've scoured the internet for this and can't find any helpful information. Is there any way for the JVM to display the default maximum heap size on a system? I can't seem to figure out what it is using as its maximum value, if I don't manually override it with -Xmx. Any help would be really appreciated. Thanks - Aaron The javadocs are your friend! It is documented in the javadoc for the tool "java". For Windows, see: http://java.sun.com/j2se/1.5.0/docs/tooldocs/windows/java.html For Linux and Solaris, see: http://java.sun.com/j2se/1.5.0/docs/tooldocs/solaris/java.html If you don't believe the javadocs and have to see it for yourself... With JDK version 1.5, you can use jconsole (also in the tool javadocs) to provide the current and maximum heap size of a running VM. -- Ian Shef 805/F6 * These are my personal opinions Raytheon Company * and not those of my employer. PO Box 11337 * Tucson, AZ 85734-1337 * Thanks for the quick reply. The default values aren't of too much help I'm afraid - the machines I'm working with are on an academic cluster, and the JVMs are not typical on the machines. The jconsole tool, though, will be a big help. I found another way (albeit, somewhat hacked) to get the default max heap - if you keep setting the Xms option higher and higher, it will error when you go above the default max heap value. However, I never knew too much about the jconsole tool - I think that it will be helpful for a lot of other monitoring stuff that I need to do soon. Thanks again! Aaron Back to top IchBin Guest Posted: Thu Sep 21, 2006 2:48 am    Post subject: Re: Display Default Heap Size Ian Shef wrote: Quote: apiccirilli (AT) gmail (DOT) com wrote in news:1158779800.453216.194170 @b28g2000cwb.googlegroups.com: Hi all - I've scoured the internet for this and can't find any helpful information. Is there any way for the JVM to display the default maximum heap size on a system? I can't seem to figure out what it is using as its maximum value, if I don't manually override it with -Xmx. Any help would be really appreciated. Thanks - Aaron The javadocs are your friend! It is documented in the javadoc for the tool "java". For Windows, see: http://java.sun.com/j2se/1.5.0/docs/tooldocs/windows/java.html For Linux and Solaris, see: http://java.sun.com/j2se/1.5.0/docs/tooldocs/solaris/java.html If you don't believe the javadocs and have to see it for yourself... With JDK version 1.5, you can use jconsole (also in the tool javadocs) to provide the current and maximum heap size of a running VM. If you want to monitor look at jconsole.exe It resides your Java's install bin subdirectory.: -- Thanks in Advance... IchBin, Pocono Lake, Pa, USA http://weconsultants.phpnet.us __________________________________________________________________________ 'If there is one, Knowledge is the "Fountain of Youth"' -William E. Taylor, Regular Guy (1952-) Back to top Display posts from previous: All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First         AppletTalk.com Forum Index -> JVM, native methods and hardware All times are GMT Page 1 of 1   Jump to: Select a forum Java Newsgroups----------------Java DiscussionsWeb-based java games comp.lang.java 3D Graphics API's for Java Java: Support and criticism Java System Announcements comp.lang.java.api JavaBeans Java and CORBA Java and Databases comp.lang.java.developer Java GUI Toolkits Java Help comp.lang.java.javascript JVM, native methods and hardware comp.lang.java.misc Java Language Programming Security and Java comp.lang.java.setup Java Software Tools comp.lang.java.tech ibm.software.java.linux  Non-English Java Newsgroups----------------Java Language (German)Language Java (Français)Java (Italian)  You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum Powered by phpBB © 2001, 2006 phpBB Group SEO toolkit © 2004-2006 webmedic.