Dynamic allocation of virtual real memory for applications based on monitored usage

A system for allocation of memory to an application associated with a virtual client logical partition in a server, comprising:

• a power hypervisor to record and control memory access by a virtual client logical partition of the server and to change an amount of virtual real memory allocated to the application in response to a kernel service message;
• a paging space partition Virtual I/O Server (VIOS) to transmit data between the power hypervisor and a physical storage device;
• a monitor to monitor an actual amount of virtual real memory used by the application;
• and
• a kernel service stored in the server as part of an operating system of the server to receive a request from an application for a change in virtual real memory of the virtual client to be allocated to the application based on the amount of virtual real memory used by the application, and to communicate with the power hypervisor, in response to receiving the request, to cause the power hypervisor to change the virtual real memory allocated to the application.

A computer program product comprising a computer useable storage medium having a computer readable program, wherein the computer readable program when executed on a computer causes the computer to:

• record and control memory access by a virtual client logical partition of the server and changing an amount of virtual real memory allocated to the application in response to a kernel service message;
• emulate the virtual client;
• monitor an actual amount of virtual real memory used by the application;
• determine from the monitoring if an amount of memory allocated to the application is to change;
• and
• dynamically reallocate an amount of virtual real memory to the application, based on the amount of virtual real memory used by the application, in response to a determination that an amount to be allocated is to change.