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What Is The Use Of System.gc And Runtime.gc

The virtual machine performs this recycling process automatically as needed, in a separate thread, even if the gc method is not invoked explicitly. What is the use of oil in this recipe? asked 5 years ago viewed 22259 times active 1 year ago Blog Developers, webmasters, and ninjas: what's in a job title? Andrew Thompson, Aug 11, 2006 #5 Chris Smith Guest Andrew Thompson <> wrote: > wrote: > .. > > I read that in Java 1.4, garbage collection cannot be forced and have a peek at this web-site

Wrap a seasonal present Why is this icon showing next to my drive? If the VM fails to act on the call, it obviously has lots of free space and therefore it does not make sense to waste CPU cycles on it. Andrew Also: it did rank the latest highest when I searched for "java lang System" the first one was from searching "System.gc()". In most implementations, System.gc() merely calls Runtime.gc().

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Similar Threads Streaming with System.IO and System.Net Charles A. The name gc stands for "garbage collector". One possible idea to increase the *perceived* performance of the application is to run System.gc from places where a one-second delay won't be noticed. Jeff Jetton Ranch Hand Posts: 71 posted 11 years ago From Sun's API documentation: System public static void gc() Runs the garbage collector.

posted 9 years ago Read the API documentation of both of those methods. Core Java All times are in JavaRanch time: GMT-6 in summer, GMT-7 in winter Contact Us | advertise | mobile view | Powered by JForum | Copyright © 1998-2016 Paul Wheaton Calls to System.gc might do nothing if, for example, there's already another concurrent collection in progress and the system can't run two collections at once. Stack Overflow Podcast #97 - Where did you get that hat?!

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package com.tutorialspoint; public class RuntimeDemo { public static void main(String[] args) { // print when the program starts System.out.println("Program starting..."); // run the garbage collector System.out.println("Running Garbage Collector..."); Runtime.getRuntime().gc(); System.out.println("Completed."); } What the VM does at this point is >> implementation dependent. How to schedule a job in Java? Thanks & Regards, Pankaj Patro Peter Chase Ranch Hand Posts: 1970 posted 9 years ago System.gc() is just a convenience for Runtime.getRuntime().gc().

System.gc() simply calls Runtime.getRuntime().gc(). System.gc() // static method gc in System class For Runtime you have to do something like this public static void main(String[] s) { Runtime r = Runtime.getRuntime(); r.gc(); } Hope that System.gc() is effectively equivalent to Runtime.gc(). Recent Posts ZooKeeper Revisited June 14, 2016 KAFKA Revisited June 13, 2016 Resolving JAVA certificateissue June 9, 2016 Alter JAVA - VM, STACK &GC June 8, 2016 Difference between System.gc() andRuntime.gc()

That's probably not accurate, though. The documentation of System.gc() says: The call System.gc() is effectively equivalent to the call: Runtime.getRuntime().gc() So, there is no difference in these two at all. more hot questions question feed lang-java about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation http://evollux.net/what-is/what-is-system-gc-and-runtime-gc.html When control returns from the method call, the Java Virtual Machine has made a best effort to reclaim space from all discarded objects.

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Can't Google rank the new docs higher than the old ones? –Asaph Jun 1 '11 at 7:09 AFAIK Google ranks pages mostly by hits, and older docs are going How to return the content in the correct encoding from a servlet? System.gc()internally calls Runtime.gc(). Runtime.getRuntime() returns Runtime obj ass'ted wth the current java appl'n.

The name gc stands for "garbage collector". but System.gc() is equivalent to Runtime.getRuntime().gc() and System.gc() is the most conventional and convenient method. The call System.gc() is effectively equivalent to the call: Runtime.getRuntime().gc() And… Runtime public void gc() Runs the garbage collector. have a peek here So it sometimes does it. –trutheality Jun 1 '11 at 7:13 1 I've been seeing this with Google search results for java APIs for years.

more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed Get the weekly newsletter! Then what exactly happens when >> System.gc and Runtime.gc are called and when (if ever) do they get >> executed? > > These methods get executed as soon as you call However, gc() method is static in System class and non-static in the Runtime class.

Using flags vs. I guess when Sun finishes open-sourcing their JVM, we'll find out! ;D Actually, from what I understand, you can configure what garbage collection algorithm Sun's JVM will use via command line Related ‹ JMS UNDERSTANDING WITHEXAMPLE Alter JAVA - VM, STACK &GC › Posted in All Leave a Reply Cancel reply Enter your comment here... What the VM does at this point is implementation dependent.