Solved

weblogic memory

Posted on 2010-09-09
5
2,544 Views
Last Modified: 2013-12-10
Folks

Can i increase my memory settings on weblogic for each managed server, currently they are:

set MEM_ARGS=-Xms512m -Xmx1536m -XX:MaxPermSize=512m

i am using 64 bit weblogic 923 with JROCKIT  R27.5.0-jdk1.5.0_14

pls advise


r
0
Comment
Question by:rutgermons
  • 3
  • 2
5 Comments
 
LVL 10

Accepted Solution

by:
ECollin earned 500 total points
ID: 33634428
i should say "why not ?"
-First of all, in a production environment, you should set -Xms at the same value as -Xmx : -Xms:1536m -Xmx:1536m
-Are you facing memory issues ?
-What kind of applications are deployed in your domain : Web app, portal, ejbs... ?

Emmanuel
0
 

Author Comment

by:rutgermons
ID: 33634692
Hi Emmanuel

We deploy maximo which is a web app via weblogic  (maximo.ear) file


we had maxpermsize memory issues at 256 but increased it to 512 and it seems better, our big issue seems if we run complex queries from the front end on a cluster then the users would get kicked out of the application

the funny thing is, is that using a standalone appserver pointing to the same database we cannot replicate this error, this leads me to think the iss plugin is problematic, I also see a lot of multicast messages are getting lost and i get an error message in wlproxy.log:

Thu Sep 09 01:58:14 2010 <1764128401519417> failure on sendRequest() w/ recycled connection to 149.177.182.132:8080, numfailures=1, lastError=0
Thu Sep 09 01:58:14 2010 <1764128401519417> Marking 149.177.182.132:8080 as bad
Thu Sep 09 01:58:14 2010 <1764128401519417> Exception occurred for backend host '149.177.182.132/8080/0' while sending request : 'PROTOCOL_ERROR [line 842 of ..\nsapi\.\URL.cpp]: Backend Server not responding'
Thu Sep 09 01:58:14 2010 <1764128401519417> got exception in sendRequest phase: PROTOCOL_ERROR [line 842 of ..\nsapi\.\URL.cpp]: Backend Server not responding at line 959; last_error 0


it seems our managed servers are losing connection to the cluster thats why the kickouts

any ideas?

0
 
LVL 10

Expert Comment

by:ECollin
ID: 33635568
you can try to replace your IIS by a simple web app deployed in a stand alone weblogic server that will act as a proxy in front of your cluster (via HttpClusterServlet).  That's for checking your cluster communications.
Related doc : http://download.oracle.com/docs/cd/E13222_01/wls/docs92/cluster/setup.html#wp684345
0
 

Author Comment

by:rutgermons
ID: 33635968
will it handle the big user load? we have 200 concurrent users over 14 managed servers?
0
 
LVL 10

Expert Comment

by:ECollin
ID: 33644214
woah !
So many servers for so few concurrent users...
Well tuned i think you could handle all your users with only one managed server...
How many concurent http sessions do you have to handle ?
Why do you need a cluster ?
Emmanuel
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

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

-Xmx and -Xms are the two JVM options often used to tune JVM heap size.   Here are some common mistakes made when using them:   Assume BigApp is a java class file for the below examples. 1.         Missing m, M, g or G at the end …
Most of the developers using Tomcat find it easy to configure the datasource in Server.xml and use the JNDI name in the code to get the connection.  So the default connection pool using DBCP (or any other framework) is made available and the life go…
This Micro Tutorial will teach you how to censor certain areas of your screen. The example in this video will show a little boy's face being blurred. This will be demonstrated using Adobe Premiere Pro CS6.
Internet Business Fax to Email Made Easy - With eFax Corporate (http://www.enterprise.efax.com), you'll receive a dedicated online fax number, which is used the same way as a typical analog fax number. You'll receive secure faxes in your email, fr…

896 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

Need Help in Real-Time?

Connect with top rated Experts

15 Experts available now in Live!

Get 1:1 Help Now