How to configure thread pool and memory for request-response scenarios in Nussknacker?

[Arjun Sivakumar]

Hi team,

I’ve been exploring how to control the thread pool size in Nussknacker request-response scenarios. From the official documentation, I didn’t find a clear reference about the number of threads used (e.g., “the server runs with X threads”).

I tried two approaches in `application-customizations.conf`:

**Case 1**

"request-response-embedded" {
  engine: "lite"
  deploymentConfig {
    restServer {
      port: 8181
      thread-pool {
        min-threads = 4
        max-threads = 16
        queue-size = 200
      }
    }
  }
}

**Case 2**

scenarioTypes {
  "request-response" {
    deploymentConfig {
      tasksCount: 4
    }
  }
}

In both cases, after adjusting the thread numbers and checking TPS, I observed no difference—the TPS remained the same.

**My question:**

1. Is there a configuration available to control the thread pool and memory for request-response scenarios?
2. If yes, could you please guide me on the right way to configure it?
3. If not, how is the thread pool internally managed in request-response mode?

I am using community edition of Nussknacker of version 1.18.0

Thanks in Advance,
Arjun S