Monitor SOA Suite service response times with Splunk by Maarten Smeets

 

clip_image001Measuring performance of services can be done in various ways. In this blog article I will describe a method of measuring Oracle SOA service response times with Splunk a popular monitoring tool. In order to monitor service response times with Splunk, Splunk needs to obtain its data from somewhere. In this example I’ll use the HTTP access log which I expand with a time-taken field. Disclaimer; my experience with Splunk is something like 2 hours. This might also be an indication of what can quickly be achieved with Splunk with little knowledge.

Making service response times available

log_policy

At first I thought about using the OWSM policy oracle/log_policy. This policy can be applied to an endpoint. The policy logs request and response messages. There is however not (without alteration of the policy) a way to correlate the request with the response message. See the image below. An ECID is logged, but the ECID can differ for a request and response. The ECID can also be the same for different requests in a call chain. Several HTTP or SOAP headers could potentially be used for this, but they have to be present in the request and in the response. This can require some work, especially if you want to add them in the request, since all consumers need to use these headers.

Correlation of request and response messages is not possible OOTB with the log_policy

access.log

The access.log file stores by default some data on HTTP requests such as timestamp, HTTP status code, url and the size of the request. This can easily be expanded with the time which is required to process a request. You can configure this from the WebLogic Console. Go to your server, Logging, HTTP and click the Advanced button. Here you can add time-taken as a field to log in the Extended Logging Format Fields. Read the complete article here.

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