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API Gateway Performance Metrics

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  • 1.  API Gateway Performance Metrics

    Posted 04-06-2017 02:59 AM

    Can anyone confirm on what criteria performance can be measured for API Gateway?



  • 2.  Re: API Gateway Performance Metrics

    Posted 04-06-2017 03:37 AM

    Hi Kareem.shaik7 ,

     

    Please can you eloborate your question? Do you want to look at the performance of the Gateway? If so, you could use other CA solutions like APM (Application Performance Management) or UIM ( Unified Infrastructure Management).

     

    Regards

    Seenu mathew



  • 3.  Re: API Gateway Performance Metrics

    Posted 04-21-2017 03:45 PM

    HI Kareem.shaik7,

     

    Have you been able to review Seenu's questions? It would be great if you could provide the requested information. Check out this doc on what info to provide to help our experts answer your questions more quickly & efficiently Best Practices for Asking a Question

     

    Thanks!

    Melanie



  • 4.  Re: API Gateway Performance Metrics
    Best Answer

    Posted 04-24-2017 12:12 PM

    There are two main sets of data you can look at around Gateway performance criteria. 

     

    Performance of the API Gateway

    This should not be the focus of performance evaluation - a Gateway is in an environment and the gateway usually isn't an end point. In some specific use cases, i.e. the OAuth Toolkit in token issuance, the gateway has some cases that it is the "end point", but even that depends on some kind of data storage subsystem. In a few cases, for specific requirements, the performance of individual elements, like "Sign JWT" have bearing on overall performance. Some assertions, especially cryptographic ones, have a real cost - Sign JWT is CPU intensive and can take hundreds of milliseconds per signature, depending on the algorithm. 

     

    Performance of an API measured BY the API Gateway

    This would be by far the more important set of criteria. In a properly designed gateway policy, the performance of back-end APIs and subsystems is far more salient to overall performance than the gateway itself. In such a case, the latency of back end APIs, maximum throughput, the performance of the subsystems consulted by policy - subsystems like LDAP, databases, Identity and Access Management systems all contribute more to overall performance than the gateway itself. There are several ways to evaluate performance, and while Transactions Per Second often shows up as a number one customer requirement, it is our view that latency is crucial - if you have good latency, TPS will take care of itself. Good latency, by the way, is measured in milliseconds. Our view is that an ideal back-end should average in the 10 to 150-millisecond range.

     

    See: Thinking in Policy - CA API Gateway - 9.2 - CA Technologies Documentation for what "properly designed policy" means in this context.