Data Center Consolidation

Data center consolidation is the process of reducing the volume of physical IT assets through highly efficient and scalable technologies. Organizations leverage data center consolidation to reduce operating costs.

Analyse and Solve Serious Hardware and Sofware Problems

Listing several basic hardware and software troubleshooting steps with respect to operating systems, software programs, and computer hardware.

Mission Critical Systems

A mission critical system is a system that is essential to the survival of a business or organization. When a mission critical system fails or is interrupted, business operations are significantly impacted.

The best server hardware to maximize IT performance

Data center hardware advances target new workloads such as big data processing, as well as higher efficiency for existing apps and services. The best server hardware for your data center depends on existing and planned application architectures, data center operations staff skills and of course the IT budget.

Showing posts with label WebCenter Content. Show all posts
Showing posts with label WebCenter Content. Show all posts

Wednesday, October 25, 2017

Customizing the WebLogic JVM heap size

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How to customize Java Virtual Machine Settings in Oracle WebLogic Server

To achieve the best performance of the application and avoid performance bottlenecks problems ( “OutOfMemory”) you need to tune your Java Virtual Machine.
After fresh install of WebLogic Server and create a Domain (WebLogic or SOA or Forms or OBIEE etc.) you may set some properties such as Java “Heap size”, tune Java “Garbage Collection” and WebLogic Server start options.
Tune JVM settings
set the Variable USER_MEM_ARGS for the Admin Server and each Managed Server to tune the JVM Parameters. For Example:
USER_MEM_ARGS="-Xms1g -Xmx3g -XX:+UseParNewGC -XX:+UseConcMarkSweepGC -XX:NewSize=1g"


Where:
  • Xms1g: JVM initial heap size: In this example: 1 GB
  • Xmx3g: JVM maximal heap size: The heap can grow to 3 GB
  • -XX:+UseParNewGC: Uses parallel version of a younger generation

You can change the default JVM heap size to fit the needs of your deployment.
The default JVM heap size for WebLogic is 3GB. The size is set in the setDomainEnv.sh file for Linux or setDomainEnv.cmd for Windows, which is in the $DOMAIN_HOME/bin directory. The heap size is set with the -Xmx option.
To change the WebLogic JVM heap size:
  1. Open the setDomainEnv file in a text editor.
  2. Search for this comment line:
    For Linux: 
    # IF USER_MEM_ARGS the environment variable is set, use it to override ALL MEM_ARGS values
    For Windows: 
    @REM IF USER_MEM_ARGS the environment variable is set, use it to override ALL MEM_ARGS values
  3. Immediately after the comment line, add one of these lines:
    For Linux: 
    export USER_MEM_ARGS="-Xms128m -Xmx3072m ${MEM_DEV_ARGS} ${MEM_MAX_PERM_SIZE}"
    For Windows: 
    set USER_MEM_ARGS=-Xms128m -Xmx3072m %MEM_DEV_ARGS% %MEM_MAX_PERM_SIZE%
  4. Save the file.
  5. Re-start WebLogic Server.      
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Monday, November 10, 2014

Fusion Middleware Administering the Application Adapters for Oracle WebCenter - Contents

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