Vmware, Inc.

Oracle International Corporation

Rajit S Kambo

Namit Jain

Shailendra Mishra

Xiaojun Liang

Carl Alan Waldspurger

Boris Weissman

John R Zedlewski

Aalap Desai

Timothy P Mann

Ramesh Dharan

Stephen Muckle

Xuwen Yu

Aiguo Dong

Michael Craig

Performance of server that is managing a group of servers, such as in a cloud, is analyzed by identifying patterns of threads executed in the server. A command is issued, repeatedly over a time period, to an operating system of the server to return a resource consumption value representative of the amount of computing resources consumed by one or more threads. The returned resource consumption values are stored and used to generate points on a graph which depicts the amount of computing resources consumed by the one or more threads over the time period and provide task breakdowns and latency information for each of the tasks.

Diagnosis of application server performance problems via thread level pattern analysis

A computer implemented method for efficiently allocating resources for an enterprise server system through a proportional integral derivative scheme is provided. The method includes defining a set point parameter for a resource being allocated and defining a proportional gain parameter, a proportional integral (PI) gain parameter and a proportional integral derivative (PID) gain parameter in terms of the proportional gain parameter. The method further includes calculating an initial maximum allocation for the resource based on a product of the proportional gain parameter with a difference of an initial operating parameter and the set point parameter and adjusting the initial operating parameter to the initial maximum allocation. A next allocation of the resource is calculated based on a product of the proportional gain parameter with the difference of an initial operating parameter and the set point parameter and a difference of the set point with a current operating parameter. The initial maximum allocation is adjusted with a next allocation.

Resource management system and apparatus

A sponge process, for example within a driver in a guest operating system, is associated in a virtual computer system with each virtual processor in one or more virtual machines. When timer interrupts become backlogged, for example because a virtual machine is temporarily descheduled to allow other virtual machines to run, and upon occurrence of a trigger event, a conventional interrupt is disengaged and catch-up interrupts are instead directed into an appropriate one of the sponge processes. The backlogged timer interrupts are thus delivered without unfairly attributing descheduled time to whatever processes happened to be running while the catch-up interrupts are delivered, and without violating typical guest operating system timing assumptions.

Method and system for improving the accuracy of timing and process accounting within virtual machines

One embodiment of the present invention provides a system that automatically sends a notification about a database event. The system operates by receiving a number of items, including a registration of a specified event-type, a subscription of a protocol for the notification, a format for the notification, and a list of recipients for the notification. The system then configures the database to send the notification about the specified event-type to the specified list of recipients in the specified format via the specified protocol. Adding this notification capability at the database-level enhances the functionality and interoperability of many applications as well as providing more robust and timely information to the appropriate audiences.

Method and apparatus for automatic notification of database events

A method and apparatus for managing a database is provided. A database management system conducts a plurality of database transactions with a plurality of clients. An event may be detected as a result of one of the transactions. The event is mapped to an independent database action. In response to detecting the event, the independent database action is executed without interference from the transaction that caused the event.

Database management system for implementing independent database actions in response to events of interest

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Sunnyvale, CA, United States of America

Rajit S Kambo