We help IT Professionals succeed at work.

We've partnered with Certified Experts, Carl Webster and Richard Faulkner, to bring you two Citrix podcasts. Learn about 2020 trends and get answers to your biggest Citrix questions!Listen Now

x

logon system and memory problem

tanphuongmy
tanphuongmy asked
on
Medium Priority
267 Views
Last Modified: 2010-04-22
Hi all experts,

Please advice me some actions to monitor memory of the red hat enterprise operating system. My system consists of tomcat, struts application, some daemons, nodemonitor.
I think it has got a lot processes, I do not know what exactly they are. And I also do not know what cause out of memory error. Please help

Thank you so much
Duy Tan
Comment
Watch Question

President
Commented:
Hi,

Since you are using Tomcat, struts applications etc. we should first determine who is causing this "out of memory" error. It seems that this is a Java error and to correct it you must modify the heap size settings of your Tomcat Application container.

When you're starting tomcat it launches an application container with defaults. Specify the JVM heap size in $TOMCAT_HOME/bin/tomcat.sh. You can specify '-Xmx256m -Xms128m' as part of TOMCAT_OPTS. That'll set your max/min JVM heap size to 256/128MBs, for example.

FYI : you can see the system memory usage with one of these comands:

To see the memory please issue:
 free
or  
 cat /proc/meminfo

top and ps also displays memory usage of each process.

Cheers,
K.

 





Not the solution you were looking for? Getting a personalized solution is easy.

Ask the Experts
Kelly BlackSenior Linux / DBA / DEVOPS
CERTIFIED EXPERT
Commented:
You may also wish to look at the output of 'top'

top

or

top -b -n 1 | less

Also check 'lsof'

man lsof

For example to see all processes which have a port bound in memory use

lsof -i -P
Access more of Experts Exchange with a free account
Thanks for using Experts Exchange.

Create a free account to continue.

Limited access with a free account allows you to:

  • View three pieces of content (articles, solutions, posts, and videos)
  • Ask the experts questions (counted toward content limit)
  • Customize your dashboard and profile

*This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

OR

Please enter a first name

Please enter a last name

8+ characters (letters, numbers, and a symbol)

By clicking, you agree to the Terms of Use and Privacy Policy.