Response time is represented by a dark blue line in some New Relic APM charts. It is the duration of a transaction from the perspective of the requester, and not necessarily the total sum of all time spent within a transaction.
Response time and total time
The relationship between response time and total amount of time is a reflection of how much concurrency is taking place among the instrumented code in your application.
|Response time||Compared to total time|
|<||If response time is less than the total time spent, you are taking advantage of concurrency with a non-blocking or asynchronous computing model.|
|=||If response time is equal to the total time spent, you may be using a blocking or synchronous computing model.|
|>||If response time is greater than the total time spent, this may be due to resource contention. For example, if the response work runs in a highly contended thread pool, other jobs must finish prior to completing the response. (The agent does not track time spent waiting for resources.)|
In order to view decoupled response time metrics, update your agent to the supported version as applicable:
- C SDK 1.0.0 or higher
- Go 2.6.0 or higher
- Java 3.22.0 or higher
- .NET: Version requirements depend on async mode
- Node.js 1.25.0 or higher
- PHP 5.4.0 or higher
- Python 18.104.22.168 or higher
- Ruby 22.214.171.1249 or higher