@Marvin how to check how many online workers in work pool with command?

To check the number of online workers in a work pool, you should look at the heartbeats that workers are sending to the Prefect API. A worker is considered online if it sends regular heartbeat messages. By default, a worker is offline if it's been more than 90 seconds since it last sent a heartbeat. The specific threshold can be configured via the

PREFECT_WORKER_HEARTBEAT_SECONDS

setting. Currently, there isn't a direct command shown to list the number of online workers. Typically, you would start workers with the following command, specifying the work pool name:

sh
prefect worker start -p "work-pool-name"

However, to get the status of the work pool or workers, you would usually access the Prefect UI or use the GraphQL API to query the workers' statuses. You might have to query the API for all workers and filter them by their

ONLINE

status to count how many are currently online. For more details, you should refer to the Prefect documentation or the Prefect community for possible updates on commands or API queries that can be used to check the number of online workers in a work pool. Here is the link to the work pools documentation: Prefect Work Pools.

max number of workers in a work pool? @Marvin

The documents do not explicitly state a maximum number of workers within a work pool. Work pools in Prefect are designed to organize and distribute work for execution. The concept operates on the pub/sub model, coordinating potentially many deployments with potentially many workers through the work pool as a known channel, much like topics in a message-based system. However, the number of workers you can run might be influenced by: 1. The infrastructure that you use to run the workers (e.g., the resources available on a Kubernetes cluster or server) 2. The scaling configurations of your serverless infrastructure providers if you use push work pools 3. The Prefect licensing plan (if using managed work pools or certain features of Prefect Cloud) To manage or view work pool configurations and their attributes, you'll typically use the Prefect UI or the Prefect API. If you need to specify limitations or set a maximum number of workers, you might need to configure that at the infrastructure level or manage it programmatically through your deployment scripts. For the most accurate and up-to-date information, you might want to consult the official Prefect documentation or reach out to Prefect support. You can find more detailed explanations in the work pools section of their documentation.