You use IGEL Universal Management Suite (UMS) and experience performance issues with the UMS Console. Manifold reasons can underlie performance degradation, and there are various solutions like optimizing the UMS according to recommendations under Performance Optimizations, updating the UMS components, etc. The following article covers only the increase of UMS Console memory (Java heap size).


You face performance problems and encounter memory issues in the UMS Console log files (igel-ums-console.log; see Where Can I Find the UMS Log Files?), e.g. java.lang.OutOfMemoryError.


The default Java heap size may be insufficient for the UMS Console. This usually happens if you have

  • a large number of devices registered (>10.000)
  • a lot of devices in one folder (a flat directory structure under Devices in the UMS Console; >1.000 per folder)

Solution: Change Java Heap Size for the UMS Console

For the UMS Console, you can modify the Java heap size as follows:

  1. Close the UMS Console.

  2. Open the following file:
    Default path on Windows:  C:\Program Files\IGEL\RemoteManager\rmclient\RMClient.config
    Default path on Linux: /opt/IGEL/RemoteManager/rmclient/RemoteManager.config

  3. Find the line vmparam -Xmx3072m and change the -Xmx value according to your needs. (Default: 3072 MB)

    The Java heap size is defined INDIVIDUALLY depending on the configuration of the server and your UMS environment, but must be less than the amount of available physical RAM. General recommendations can be found in the Oracle article Tuning Java Virtual Machines (JVMs); see also the -Xmx option there.

    Note also the following:

    • All heap size changes are at your own risk! Change the heap size only if you know exactly what you are doing. In the case of improper configuration, the UMS Console will be unable to run.
    • Reducing the memory may affect the function of the UMS and is NOT recommended.
    • During the UMS update, the heap size value is set to the default. Therefore, you have to adapt it again.

  4. Save the changes.

  5. Restart the UMS Console.

Related Topics

How to Configure Java Heap Size for the UMS Server

How to Configure Java Heap Size for the ICG