Method and device for controlling load receiving velocity of application server
An application server, receiving rate technology, applied in the computer field, can solve the problem of not being able to track the changes of application characteristics well
Active Publication Date: 2010-12-01
IBM CORP
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However, in this scheme, since the control gain of the controller is a fixed value, it cannot track the change of the application characteristics well
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[0022] It is believed that the above and other objects, features and advantages of the present invention will become more apparent through the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings.
[0023] In the following embodiments, the application server may be implemented by a virtual machine, or by a physical machine with limited memory capacity. As the control object of the feedback controller, the application server is controlled by the feedback controller to prevent memory overload. figure 2 A J2EE application server environment using memory overload control is schematically shown. Such as figure 2 As shown, requests from users are sent to a proxy server as the entry point to the J2EE application server environment, which performs dynamic request routing to achieve quality of service goals. Then, the request is distributed to a backend server composed of multiple server nodes for processing, ...
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The invention discloses a method for controlling load receiving velocity of application server and a corresponding system. The method includes that the actual memory usage and load receiving velocity of an application server in the current control period are detected, the load characteristic variation parameter of the application server is estimated based on the detected actual memory usage and load receiving velocity, the control gain of a feedback controller is calculated according to the load characteristic variation parameter, and the feedback controller utilizes the calculated control gain to calculate the load receiving velocity of the application server in the next control period. By tracking the working load characteristic variation of the application server, the load receiving velocity of the application server can be adaptively controlled, so as to cause the actual memory usage of the application server to be maintained to be or close to target memory usage. Besides, only target memory usage is required to be set by a system administrator, so that configuration is simple and convenient compared with the existing memory overload protection method.
Description
technical field [0001] The invention relates to the field of computers, in particular to memory overload protection in the memory management technology of an application server. Background technique [0002] Memory overload is becoming a key challenge in performance management of enterprise application servers such as J2EE application server environments. Generally, such an application server is mainly realized by a Java virtual machine, and its memory capacity is limited. The memory of the application server is continuously used by various applications, and the unused memory space is automatically reclaimed from the memory heap by garbage collection (GC). If the actual memory usage of the application server reaches the maximum available memory, Out of Memory will occur, which will cause the application server to crash. In addition, when the actual memory usage is high, it is easy to cause the performance of the application to drop sharply, which is very unfavorable for ap...
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IPC IPC(8): H04L1/00H04L12/56H04L29/08H04L12/803
Inventor 吴海珊刁以欣亚瑟·N·坦塔维胡晓磊迈克尔·斯普利特泽田瑞雄
Owner IBM CORP