[airflow] branch master updated: Added database upgrade information to upgrade doc (#13005)

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The following commit(s) were added to refs/heads/master by this push:
     new 0ffd5fa  Added database upgrade information to upgrade doc (#13005)
0ffd5fa is described below

commit 0ffd5fa3d87e78126807e6cdb4b1b29154047153
Author: Vikram Koka <vi...@astronomer.io>
AuthorDate: Fri Dec 11 08:20:35 2020 -0800

    Added database upgrade information to upgrade doc (#13005)
    
    Added information about db upgrade sample time to the
    database upgrade section.
---
 docs/apache-airflow/upgrading-to-2.rst | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/docs/apache-airflow/upgrading-to-2.rst b/docs/apache-airflow/upgrading-to-2.rst
index 9f64102..27a731e 100644
--- a/docs/apache-airflow/upgrading-to-2.rst
+++ b/docs/apache-airflow/upgrading-to-2.rst
@@ -508,6 +508,9 @@ At this point, just follow the standard Airflow version upgrade process:
 
       The database upgrade may take a while depending on the number of DAGs in the database and the volume of history
       stored in the database for task history, xcom variables, etc.
+      In our testing, we saw that performing the Airflow database upgrade from Airflow 1.10.14 to Airflow 2.0
+      took between two to three minutes on an Airflow database on PostgreSQL with around 35,000 task instances and
+      500 DAGs.
       For a faster database upgrade and for better overall performance, it is recommended that you periodically archive
       the old historical elements which are no longer of value.