# OpenJ9 optimization pack

The *OpenJ9* optimization pack enables the ability to optimize Java applications based on the Eclipse OpenJ9 VM, formerly known as IBM J9. Through this optimization pack, Akamas is able to tackle the problem of performance of JVM-based applications from both the point of view of cost savings and quality of service.

To achieve these goals the optimization pack provides parameters that focus on the following areas:

* Garbage collection
* Heap
* JIT

Similarly, the bundled metrics provide visibility on the following aspects of tuned applications:

* Heap and memory utilization
* Garbage Collection
* Execution threads

## Component Types

The optimization pack supports the most used versions of JVM.

<table><thead><tr><th width="190">Component Type</th><th>Description</th></tr></thead><tbody><tr><td><a href="openj9-pack/ibm-j9-vm-6">IBM J9 VM 6</a></td><td>Eclipse OpenJ9 (formerly known as IBM J9) Virtual Machine version 6</td></tr><tr><td><a href="openj9-pack/ibm-j9-vm-8">IBM J9 VM 8</a></td><td>Eclipse OpenJ9 (formerly known as IBM J9) Virtual Machine version 8</td></tr><tr><td><a href="openj9-pack/eclipse-open-j9-11">Eclipse Open J9 11</a></td><td>Eclipse OpenJ9 (formerly known as IBM J9) version 11</td></tr></tbody></table>

## Installing <a href="#workflow-design" id="workflow-design"></a>

Here’s the command to install the Eclipse OpenJ9 optimization pack using the Akamas CLI:

```
$ akamas install optimization-pack OpenJ9
```

For more information on the process of installing or upgrading an optimization pack refer to [Install Optimization Packs](https://docs.akamas.io/akamas-docs/3.1.2/using-akamas/preparing-optimization-studies/modeling-components/installing-optimization-packs).


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