Threshold analysis of request degradation in the computer network

In this paper, the existing approaches to the assessment of computer networks performance are considered. The standard structure of a network of the application layer of the OSI model using the example of SBIS3 application (product of Tensor Company) is treated.
Further, two approaches allowing to analyze degradations in a network are considered — on the basis of aggregated data and the operational analysis.
The degradation study of more than 60 000 request types between two versions of application which works on the basis of the computer network is the cornerstone of the first decision. Each type of requests is described by four based metrics, each metrics representing a time series. The input data are aggregated every 10 minutes before an analysis algorithm. Further, the threshold criteria based on mathematical expectation and dispersion within two adjacent versions of the software are used. Such an approach allows to significantly reduce time for the analysis of potential problems in case of updates within the computer network.
The second decision is based on not aggregated input data. It consists of detail information about all requests, there are data section of the computer network. A threshold criterion is based on durations in the selected queue. This analysis type allows to diagnose the errors with problem clients.