How to dynamically monitor Java heap size?

java monitoring heap
flyingfromchina picture flyingfromchina · Jan 29, 2010 · Viewed 92.1k times · Source

I am trying to monitor the java heap size dynamically. Does anybody know how to get the maxmium memory used in the process of running a piece of codes? Does the Runtime.maxMemory() do the trick? Thanks

Answer

Jacob Schoen picture Jacob Schoen · Jan 29, 2010

maxMemory() returns the maximum amount of memory that java will use. So That will not get you what you want. totalMemory() is what you are looking for though. See The docs

Related questions

Get heap dump from a remote application in Java using JVisualVM

I run JVisualVM (Windows XP, Sun Java 1.6.0.13, 32 bit client VM) to monitor a distant application (Linux, Sun Java 1.6.0.07, 64 bit server VM). Before starting the actual remote application, I launch on the remote machine jstatd using an all access policy: grant …

Read More
How to activate JMX on my JVM for access with jconsole?

How to activate JMX on a JVM for access with jconsole?

Read More
How to monitor Java memory usage?

We have a j2ee application running on Jboss and we want to monitor its memory usage. Currently we use the following code System.gc(); Runtime rt = Runtime.getRuntime(); long usedMB = (rt.totalMemory() - rt.freeMemory()) / 1024 / 1024; logger.information(this, "memory …

Read More