15.4 Analyzing the Response Time of a Web Server

You can analyze the processing performance of Application Server based on the trace information output from the function layer such as the redirector and Web container, in the series of processes from the client to EIS such as databases, until the processing result is returned to the client.

This section describes how to analyze the time from when a Web server received a request from a client to when the response was returned to the client, with an example.

You use the event ID 0x8001 and 0x8101 assigned to the redirector as a key to perform filtering of trace based performance analysis files collected in the Web server. The following table describes the trace collection points which are indicated by the event IDs used in filtering.

Table 15‒3: Trace collection points indicated by the event IDs used in filtering

Event ID	Trace acquisition points
0x8001	Sending the request header information to a Web container
0x8101	Receiving the response completion notification from the Web container

The following is an example of filtering the trace based performance analysis, by using the event IDs 0x8001 and 0x8101 as a key.

Figure 15‒1: Example of filtered trace based performance analysis file

You can analyze the response time of each request from the trace collection date and time of 0x8001 and 0x8101. In the example shown in Figure 15-1, if you compare the response time of requests in which communication number of the client application information are 0x00000000000000c7 and 0x00000000000000cc, you will observe that the time taken for processing the request 0x00000000000000c7 is more.

Organization of this section

• 15.4.1 Identifying the Request for Which Timeout Occurred

• 15.4.2 Investigating the Log Using the Root Application Information

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