[airflow] 03/16: Fix doc description of [core] parallelism config setting (#23768)

[ep...@apache.org]

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ephraimanierobi pushed a commit to branch v2-3-test
in repository https://gitbox.apache.org/repos/asf/airflow.git

commit 6ca7f3a3178e99c7c2742a8d32430b4899a7d3fa
Author: Chris Redekop <32...@users.noreply.github.com>
AuthorDate: Wed May 18 01:08:33 2022 -0600

    Fix doc description of [core] parallelism config setting (#23768)
    
    (cherry picked from commit 23037503b51cd8ea2acd2214116fc1693eb98cb4)
---
 airflow/config_templates/config.yml          | 7 ++++---
 airflow/config_templates/default_airflow.cfg | 7 ++++---
 2 files changed, 8 insertions(+), 6 deletions(-)

diff --git a/airflow/config_templates/config.yml b/airflow/config_templates/config.yml
index 9da14d48aa..f7409373c2 100644
--- a/airflow/config_templates/config.yml
+++ b/airflow/config_templates/config.yml
@@ -62,9 +62,10 @@
       default: "SequentialExecutor"
     - name: parallelism
       description: |
-        This defines the maximum number of task instances that can run concurrently in Airflow
-        regardless of scheduler count and worker count. Generally, this value is reflective of
-        the number of task instances with the running state in the metadata database.
+        This defines the maximum number of task instances that can run concurrently per scheduler in
+        Airflow, regardless of the worker count. Generally this value, multiplied by the number of
+        schedulers in your cluster, is the maximum number of task instances with the running
+        state in the metadata database.
       version_added: ~
       type: string
       example: ~
diff --git a/airflow/config_templates/default_airflow.cfg b/airflow/config_templates/default_airflow.cfg
index f58b688a6b..6591f82dc0 100644
--- a/airflow/config_templates/default_airflow.cfg
+++ b/airflow/config_templates/default_airflow.cfg
@@ -53,9 +53,10 @@ default_timezone = utc
 # full import path to the class when using a custom executor.
 executor = SequentialExecutor
 
-# This defines the maximum number of task instances that can run concurrently in Airflow
-# regardless of scheduler count and worker count. Generally, this value is reflective of
-# the number of task instances with the running state in the metadata database.
+# This defines the maximum number of task instances that can run concurrently per scheduler in
+# Airflow, regardless of the worker count. Generally this value, multiplied by the number of
+# schedulers in your cluster, is the maximum number of task instances with the running
+# state in the metadata database.
 parallelism = 32
 
 # The maximum number of task instances allowed to run concurrently in each DAG. To calculate