This section describes OOM plug-ins and how the priority of OOM plug-ins can be specified.
An OOM plug-in is a gateway component, which releases RAM from a running application or server. The function of OOM plug-in is to delegate the OOM commands from OOM Monitor to the application. Each application provides its own OOM plug-in, which allows OOM Monitor to communicate with that application. The application associated with an OOM plug-in is referred as the target application of the plug-in.
Each OOM plug-in has a priority assigned by the OOM Monitor in the configuration file. The priority of an OOM plug-in determines the priority of the optional RAM allocation. For more information on setting the priorities in the configuration file, refer to Priority Configuration. OOM Monitor uses the lowest priority action to release RAM whether it is closing an application or calling a plug-in.
In the OOM Monitor configuration file, the priority of a plug-in should always be configured lower than the priority of its target application. Otherwise the plug-in will never be used for releasing RAM, because the target application is always closed before calling the plug-in.
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