Availability parameters 

3.4.1 Service Performance Parameters 

For performance parameters, they can typically be broken down into parameters that are 

concerned with timing information such as the time a request is made and data transfer 

information such as the length of a reply message body. Combining both of these types of 

parameters offers the possibility to derive other parameters such as throughput and latency. 

3.4.1.1 Base Request/Reply Performance Parameters 

The following are suggested base parameters for HTTP performance. 

Parameter Name 

General Description 

RequestTime 

The time in milliseconds that the request is issued 

RequestBodyStartTime 

The time of starting to send a message body (if any) 

associated with a request 

RequestBodyEndTime 

The time in milliseconds of finishing the sending a 

message body (if any) associated with a request 

RequestContentLength 

The content length of the request message body (if any) 

ReplyTime 

The time in milliseconds that the reply headers are 

received 

ReplyContentLength 

The content length of the reply message body (if any) 

ReplyContentType 

The content type of the reply message body (if any) 

ReplyBodyStartTime 

The time in milliseconds of starting to receive a message 

body (if any) associated with a reply 

ReplyBodyEndTime 

The time in milliseconds of finishing the receipt a 

message body (if any) associated with a reply 

Table 1: Base Performance Parameters 

Although, there are other parameters that could also be monitored such as the IP address of 

the client making the request, the ones that are identified above are key parameters for 

analysing the performance of HTTP. 

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