mcheepati: May 2012

Monday, May 7, 2012

How to configure Heap size in Web logic app server

How to configure Heap size in Web sphere app server

We can change WAS heap size in two ways
1. GUI
2. Command Prompt

GUI:

To set the JVM heap size:

1. Start the WebSphere Application Server administrative console.
2. Navigate to Servers > Application servers > server1 > Java and Process Management > Process Definition > Java Virtual Machine. server1 is the name of the server where you are deploying InfoSphere™ Master Content.
3.Set the initial and maximum heap sizes:

Initial Heap Size:
Maximum Heap Size:
Note: By default these values are in MB

Non GUI:

1. Navi gate to IBM_HOME\WebSphere\AppServer\profiles\AppSrv01\config\cells\server.xml

2. Then look for the “jvmEntries” xml element that could look like this:

<jvmEntries xmi:id=”JavaVirtualMachine_1183122130078″ verboseModeClass=”false” verboseModeGarbageCollection=”false” verboseModeJNI=”false” initialHeapSize=”512″ runHProf=”false” debugMode=”false” debugArgs=”-agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=7777″ disableJIT=”false”>
3. Change the initialHeapSize and maximumHeapSize

How to configure Heap size in Tomcat app server

How to configure Heap size in Jboss app server

For running JAVA applications in Jboss application server , need to specify the min and max memory for that Application server this sizing is called Heap size.

run.conf contains min and Max heap size. This file is located in bin folder of JBOSS i.e. JBOSS_HOME/bin

Thursday, May 3, 2012

JVM Heap Sizes max Limit for Windows and Linux/Unix.

For running JAVA code, We need JVM. Typically We can set the JVM sizes in Application servers. This JVM size is also called Heap Size.

JVM heap size Configuration file:

File_Name Location Server_Name OS_Name 64/32 Bit Processor Heap Sise_Max
-------------------------------------------------------------------------------------------------------
run.conf JBOSS_HOME/bin JBOSS Windows 32   1.4G to 1.6G
run.conf JBOSS_HOME/bin JBOSS Windows 64 3G

   run.conf JBOSS_HOME/bin JBOSS Sun Solaris 32 2G
  run.conf JBOSS_HOME/bin JBOSS Sun Solaris 64 4G

   run.conf JBOSS_HOME/bin JBOSS Unix/Linux 32 2G
  run.conf JBOSS_HOME/bin JBOSS   Unix/Linux    64 4G

------------------------------------------------------------------------------------------------------------------------------
catalena.sh   TOMCAT_HOME/bin TOMCAT   Windows 32   1.4G to 1.6G
catalena.sh   TOMCAT_HOME/bin   TOMCAT    Windows 64 3G

catalena.sh   TOMCAT_HOME/bin   TOMCAT   Sun Solaris 32 2G
catalena.sh   TOMCAT_HOME/bin   TOMCAT   Sun Solaris 64 4G

catalena.sh   TOMCAT_HOME/bin   TOMCAT    Unix/Linux    32 2G
catalena.sh   TOMCAT_HOME/bin   TOMCAT    Unix/Linux    64 4G
-----------------------------------------------------------------------------------------------------

server.xml See below note1 Web Sphere Windows 32 1.4G to 1.6G

server.xml     See below note1                 Web Spher            Windows             64                             3G


server.xml    See below note1                   Web Sphere      Sun Solaris            32                              2G

server.xml    See below note1                   Web Sphere      Sun Solaris            64                              4G




server.xml See below note1                   Web Sphere    Unix/Linux    32               2GB                        
server.xml See below note1                   Web Sphere    Unix/Linux    64               4G

Note:
For Web Sphere Location is in Command Prompt:
<TWS_home>/appserver/profiles/twsprofile/config/cells/
DefaultNode/nodes/DefaultNode/servers/server1/server.xml


For Web Sphere Location is in UI : Application servers > server1 > Java and Process Management > Process Definition >Java Virtual Machine