Symantec Corporation

Tonic Software, Inc.

John Bradley Chen

Brian David Marsh

Erkki Ville Juhani Aikas

Stephen William Cote

Ethan George Russell

A service monitor and a browser monitor determine performance metrics on both a server and a client in connection with a distributed application running on a network. While applicable to other types of distributed application data, an example is described in which a Web page is requested by a user running a browser program on the client computer. In response, the server transmits the requested Web page, along with JavaScript code that defines a browser monitor, to the client. A browser monitoring function controlled by this code determines a plurality of different performance metrics related to the access of Web pages by the client. In addition, the server monitor determines performance metrics specific to its function in providing the Web page to the client. A correlated performance metric is determined by combining a server performance metric with a browser performance metric.

Method and system for monitoring the performance of a distributed application

A method of analyzing performance data collected in regard to a plurality of content sources on a network. A ratio of performance metrics such as a render time for retrieving and displaying images and a fetch time for retrieving a base document, or a render bandwidth and a fetch bandwidth, for different content sources, is very useful in analyzing the performance of a distributed application across the network. By comparing measurements for two or more content sources and analyzing them according to a network structure, it is possible to recognize differences in the relative performance of the content sources and to quantify one content source relative to a standard defined by the performance of the other. The analysis both determines network performance and identifies specific performance problems manifest at specific localities of the network topology.

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John Bradley Chen