This attribute reports the ratio of the private resident set size (RSS) of the project, to the RSS cap set for the project, calculated in terms of percentage. This parameter measures the current usage of RSS in terms of the allocated cap for the project.
Thus, a value above 100% means the private RSS usage of the project has exceeded the allocated RSS cap and indicates that the paging activity can be started. However, a value above 100 may not directly start the paging activity since it is also dependent on the 'Memory cap enforcement threshold' attribute of the resource capping daemon which checks whether or not the memory enforcement threshold has been crossed. If the threshold has been crossed, then the resource capping daemon starts the paging activity to bring the used RSS within limits. This action is taken by the operating system itself.
When the value of this parameter goes out of the border range for two consecutive collection cycles, this parameter goes into a WARNING state. This merely indicates that paging activity for the project can be started.
If PATROl observes the paging activity for two consecutive collection cycles, the PROJPgOut parameter generates an event of type WARNING. At the same time, PATROL annotates the corresponding data point of this parameter with a list of the top five processes of the project consuming maximum RSS. Annotations are denoted by an asterisk * or the user-specified symbol in the graph.
This parameter is available only when the RSS cap has been set for the respective project. The RSS cap for a project is controlled by the system resource control, rcap.max-rss. If the RSS cap is not set for a project or the resource capping daemon (rcapd) for that zone is not active this parameter is deactivated.