How to get the current heap size of java on linux

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wong_powah@yahoo.ca - 04 Jan 2008 17:15 GMT

How to get the current heap size of java on linux?

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wong_powah@yahoo.ca - 04 Jan 2008 17:15 GMT

On Jan 4, 12:15 pm, wong_po...@yahoo.ca wrote:

> How to get the current heap size of java on linux?

# java -version
java version "1.6.0_02"
Java(TM) SE Runtime Environment (build 1.6.0_02-b05)
Java HotSpot(TM) Server VM (build 1.6.0_02-b05, mixed mode)

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Real Gagnon - 04 Jan 2008 17:52 GMT

> On Jan 4, 12:15 pm, wong_po...@yahoo.ca wrote:
>> How to get the current heap size of java on linux?
[quoted text clipped - 3 lines]
> Java(TM) SE Runtime Environment (build 1.6.0_02-b05)
> Java HotSpot(TM) Server VM (build 1.6.0_02-b05, mixed mode)

By using the java.lang.management API
http://java.sun.com/javase/6/docs/api/java/lang/management/package-
summary.html

By using an external JMX utility, ex. jconsole
http://java.sun.com/javase/6/docs/technotes/guides/management/jconsole.html

Good Luck.

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Real Gagnon from Quebec, Canada
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wong_powah@yahoo.ca - 04 Jan 2008 18:49 GMT

> > On Jan 4, 12:15 pm, wong_po...@yahoo.ca wrote:
> >> How to get the current heap size of java on linux?
[quoted text clipped - 15 lines]
> *http://www.rgagnon.com/howto.html
> *http://www.rgagnon.com/bigindex.html

I am looking for a command line tool.
Is this the best way?
ps -ef|grep java
jmap -heap <pid>

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Real Gagnon - 04 Jan 2008 19:03 GMT

>> By using the java.lang.management
>> APIhttp://java.sun.com/javase/6/docs/api/java/lang/management/package-
[quoted text clipped - 8 lines]
> ps -ef|grep java
> jmap -heap <pid>

Yep, jmap is the command line utility provided by the JDK1.6 for memory
related statistics.

http://java.sun.com/javase/6/webnotes/trouble/TSG-VM/html/gbdid.html

Bye.

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Real Gagnon from Quebec, Canada
* Java, Javascript, VBScript and PowerBuilder code snippets
* http://www.rgagnon.com/howto.html
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Jason Cavett - 04 Jan 2008 17:46 GMT

On Jan 4, 12:15 pm, wong_po...@yahoo.ca wrote:

> How to get the current heap size of java on linux?

I could be wrong, but IIRC, passing the flag -verbosegc to the JRE
will output the current heap size whenever the garbage collector is
run. That's just off the top of my head, though...not sure if it's
true.

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How to get the current heap size of java on linux

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