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From <>
Subject Re: Benchmarking of Airflow Scheduler with Celery Executor
Date Fri, 13 Apr 2018 16:14:50 GMT
Thanks Ry,
Just wondering if there is any approximate number on concurrent tasks a scheduler can run
on say 16 GB RAM and 8 core machine.
If its already been done that would be useful.
We did some benchmarking with local executor and observed that each TaskInstance was taking
~100MB of memory so we could only run ~130 concurrent tasks on 16 GB RAM and 8 core machine.

-Raman Gupta  


On 2018/04/12 16:32:37, Ry Walker <> wrote: 
> Hi Raman -
> First, we’d be happy to help you test this out with Airflow. Or you could
> do it yourself by using (w/ Docker
> Engine + Docker Compose) to quickly spin up a test environment. Everything
> is hooked to Prometheus/Grafana to monitor how the system reacts to your
> workload.
> -Ry
> CEO, Astronomer
> On April 12, 2018 at 12:23:46 PM, (
> wrote:
> Hi All,
> We have requirement to run 10k(s) of concurrent tasks. We are exploring
> Airflow's Celery Executor for same. Horizontally Scaling of worker nodes
> seem possible but it can only have one active scheduler.
> So will Airflow scheduler be able to handle these many concurrent tasks.
> Is there any benchmarking number around airflow scheduler's scalability.
> Thanks,
> Raman

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