Device, system and method for assigning portions of a global resource limit to application engines based on relative load

A method, comprising:

• providing a database hardware resource comprising an associated global resource limit;
• providing a plurality of instances of at least one respective application engine, at least one respective operator engine and a plurality of respective separate resource usage application engines;
• monitoring, at a respective operator engine of a respective instance of the plurality of instances, a respective metric representative of respective load at a respective application engine of the respective instance, the respective application engine shares the associated global resource limit of the database hardware resource,
• wherein each application engine of the respective instance, and for each of the plurality of instances:
• receives respective database hardware usage requests from a plurality of separate resource usage application engines of the respective instance,
• pools the respective database hardware usage requests;
• and
• transmits the pooled respective database hardware usage requests to the database hardware resource;
• sharing, at the respective operator engine of the respective instance, the respective metric with other operator engines of different instances of the plurality of instances;
• determining, at the respective operator engine of the respective instance, a portion of total load at the respective application engine of the respective instance based on the respective metric of the respective operator engine and respective metrics received from other operator engines of the different instances;
• assigning, at the respective operator engine of the respective instance, a portion of the global resource limit to the respective application engine of the respective instance based on the portion of total load;
• determining changes in a demand of the database hardware usage requests placed on the respective application engine of the respective instance;
• and
• activating and deactivating, via at least one processor, some of application engines and some of operator engines in response to the changes in the demand of database hardware usage requests sent from the plurality of separate resource usage application engines to at least one application engine of the respective instance, thereby inhibiting slowdowns in the database hardware resource that is responding to the database hardware usage requests.