Solved

how to tell memory useage of my app in a Mac

Posted on 2014-02-06
3
466 Views
Last Modified: 2014-02-11
i am introducing caching to one of my apps (it calls various service methods to access data from DB), and i want to find out how much extra physical memory it takes.  i have tried the activity monitor and also this:

$ Ps -ef | grep dsp
716566150  3234  1070   0  5:41PM ttys000    1:43.18 /Library/Java/JavaVirtualMachines/jdk1.7.0_51.jdk/Contents/Home/bin/java -Xdebug -Xnoagent -Djava.compiler=NONE -Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=5005 -server -Xms128M -Xmx512M -XX:+HeapDumpOnOutOfMemoryError -XX:PermSize=128M -Dcom.sun.management.jmxremote -Ddsp-env=osgi -Djava.net.preferIPv4Stack=true -Djava.security.egd=file:///dev/urandom -Djava.endorsed.dirs=/Library/Java/JavaVirtualMachines/jdk1.7.0_51.jdk/Contents/Home/jre/lib/endorsed:/Library/Java/JavaVirtualMachines/jdk1.7.0_51.jdk/Contents/Home/lib/endorsed:/Users/212353126/GIA150/dsp-k-1.5.0/lib/endorsed -Djava.ext.dirs=/Library/Java/JavaVirtualMachines/jdk1.7.0_51.jdk/Contents/Home/jre/lib/ext:/Library/Java/JavaVirtualMachines/jdk1.7.0_51.jdk/Contents/Home/lib/ext:/Users/212353126/GIA150/dsp-k-1.5.0/lib/ext -Dkaraf.instances=/Users/212353126/GIA150/dsp-k-1.5.0/instances -Dkaraf.home=/Users/212353126/GIA150/dsp-k-1.5.0 -Dkaraf.base=/Users/212353126/GIA150/dsp-k-1.5.0 -Dkaraf.data=/Users/212353126/GIA150/dsp-k-1.5.0/data -Djava.io.tmpdir=/Users/212353126/GIA150/dsp-k-1.5.0/data/tmp -Djava.util.logging.config.file=/Users/212353126/GIA150/dsp-k-1.5.0/etc/java.util.logging.properties -Dkaraf.startLocalConsole=true -Dkaraf.startRemoteShell=true -classpath /Users/212353126/GIA150/dsp-k-1.5.0/lib/karaf-jaas-boot.jar:/Users/212353126/GIA150/dsp-k-1.5.0/lib/karaf.jar org.apache.karaf.main.Main
716566150  3408  3182   0  5:59PM ttys004    0:00.00 grep dsp

but i am not sure what all the results mean.  for example, what is the memory usage?  is it possible to break the usage down to a finer level, e.g. by thread or service call?  also is there a way to log the usage?
0
Comment
Question by:mmingfeilam
3 Comments
 
LVL 13

Assisted Solution

by:Phil Phillips
Phil Phillips earned 250 total points
ID: 39841247
I'm not aware of something that can show memory usage per thread, but you can see the usage of the JVM and its different memory spaces using jstat.

Here's the man page for OSX: https://developer.apple.com/library/mac/documentation/Darwin/Reference/Manpages/man1/jstat.1.html
0
 
LVL 16

Accepted Solution

by:
Valeri earned 250 total points
ID: 39841267
put this lines before operation and after operation an you will see:

long usedMB = (runtime.totalMemory() - runtime.freeMemory()) / 1024 / 1024;
System.out.println("memory usage" + usedMB);

for more information use VisualVM, it's much more better than jstat.
http://visualvm.java.net/
0
 
LVL 29

Expert Comment

by:serialband
ID: 39851604
If you just wanted %mem, you could just do that with ps.

ps -meo %mem -o command|more
0

Featured Post

Free Tool: SSL Checker

Scans your site and returns information about your SSL implementation and certificate. Helpful for debugging and validating your SSL configuration.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Introduction This article is the first of three articles that explain why and how the Experts Exchange QA Team does test automation for our web site. This article explains our test automation goals. Then rationale is given for the tools we use to a…
Introduction This article is the second of three articles that explain why and how the Experts Exchange QA Team does test automation for our web site. This article covers the basic installation and configuration of the test automation tools used by…
Viewers learn about the scanner class in this video and are introduced to receiving user input for their programs. Additionally, objects, conditional statements, and loops are used to help reinforce the concepts. Introduce Scanner class: Importing…
Viewers will learn about the regular for loop in Java and how to use it. Definition: Break the for loop down into 3 parts: Syntax when using for loops: Example using a for loop:

839 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question