Camunda server performance is very poor because of these below queries, please let us know what we need to do on this:

[hassang]

You can set the business key at a later stage

Delegation Code | docs.camunda.org

Signal Start Event by REST API with businessKey

Hi @Ivano, You can write the execution listener using any supported scripting language. [image] [image] Attached is a simple running example test_signal_process.bpmn (2.7 KB) If 1 to 1 message-process behavior is the target, why not use start message event instead of using start signal event