Heap size is important when building an environment, as it will dictate the amount of memory available for FlexNet Manager for Engineering Applications. For example, if your server has 50 GB of RAM, you can limit FlexNet Manager for Engineering Applications to only use 16 GB by configuring the heap size.

The cause of many performance issues with FlexNet Manager for Engineering Applications is a lack of resources as the environment grows larger. As your environment grows, the number of resources required to keep the application performing at an optimal level will increase. Increasing the heap size can resolve most slowness/performance issues.

RAM requirements 

We recommend a minimum of 16 GB of RAM for each the Admin and Reporting servers. These specifications are based on a small environment. The larger the environment, the more resources you will need.

Factors that will affect RAM requirements:

• The number of agents/license servers/vendors 
• The amount/size of .RL files imported into FlexNet Manager for Engineering Applications 
• Users' usage of the application, specifically the reporting functionality 
• The size of your database 

Increase/decrease the heap size 

Option 1

1. Stop the Admin and Reporting services and ensure no associated processes are open in the task manager.

2. Open a command prompt as an administrator and go to the installation directory:

<Installation Directory>\FLEXnet\manager\admin\ 
<Installation Directory>\FLEXnet\manager\reporting\ 

3. Run the following command:

 flexnet site 

4. In the configurator, go to step 2 of 6, then change the Initial Heap Size and Maximum Heap Size to your desired values.

Note: The initial heap size cannot be the same as the maximum heap size. If you're lowering the maximum heap size, the initial heap size value must be lower than the maximum.

5. Click Next until the final step, then select Finish. This process will rebuild the configuration files with the reduced heap size.
 

Option 2

1. Stop the Admin and Reporting services and ensure no associated processes are open in the task manager
 
2. Navigate to the following directory and open the site.properties file in notepad:

<Installation Directory>\FLEXnet\manager\admin\config 
<Installation Directory>\FLEXnet\manager\reporting\config 

3. Modify the maximum and initial heap sizes to the desired values.

flexnet.heap.maximum=32768 
flexnet.heap.initial=16384

Note: The initial heap size cannot be the same as the maximum heap size. If you're lowering the maximum heap size, the initial heap size value must be lower than the maximum.

4. Open a command prompt as an administrator. Go to the installation directory and run the below command to rebuild the configuration files.

flexnet site make