marcosmarxm commented on a change in pull request #15183: URL: https://github.com/apache/airflow/pull/15183#discussion_r606820473
########## File path: docs/apache-airflow/common-pitfall.rst ########## @@ -0,0 +1,202 @@ + .. Licensed to the Apache Software Foundation (ASF) under one + or more contributor license agreements. See the NOTICE file + distributed with this work for additional information + regarding copyright ownership. The ASF licenses this file + to you under the Apache License, Version 2.0 (the + "License"); you may not use this file except in compliance + with the License. You may obtain a copy of the License at + + .. http://www.apache.org/licenses/LICENSE-2.0 + + .. Unless required by applicable law or agreed to in writing, + software distributed under the License is distributed on an + "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + KIND, either express or implied. See the License for the + specific language governing permissions and limitations + under the License. + + +Common Pitfalls +=============== + +Airflow Configurations +^^^^^^^^^^^^^^^^^^^^^^ + +Configuring parallelism +----------------------- + +These configurations are executor agnostic. + +- :ref:`config:core__parallelism` + + The maximum number of task instances that Airflow can run concurrently. + This number usually reflects the number of task instances with the + running state in the metadata database. + +- :ref:`config:core__dag_concurrency` + + The maximum number of task instances to be allowed to run concurrently + per DAG. To calculate the number of tasks that is running concurrently + for a DAG, add up the number of running tasks for all DAG runs of the DAG. + This is configurable at the DAG level with ``concurrency``. + +- :ref:`config:core__max_active_runs_per_dag` + + The maximum number of active DAG runs per DAG. The scheduler will not + create more DAG runs if it reaches the limit. This is configurable at + the DAG level with ``max_active_runs``. Review comment: These appear to duplicate the content in [here](https://airflow.apache.org/docs/apache-airflow/stable/configurations-ref.html) why not update configurations to be more descriptive and reference here? There some content in [FAQ How can my airflow dag run faster](https://airflow.apache.org/docs/apache-airflow/stable/faq.html#how-can-my-airflow-dag-run-faster) that are correlated with this too, WDYT? -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: [email protected]
