[5.1.x] Fixed #33497 -- Doc'd that persistent DB connections should be disabled in ASGI and async modes.

Backport of 8713e4ae96817a0c7be3f7a8fee25a7c7f819721 from main.

2 files changed, 9 insertions, 0 deletions

diff --git a/docs/ref/databases.txt b/docs/ref/databases.txt
index fff8f928fc..b8dfcea2b7 100644
--- a/docs/ref/databases.txt
+++ b/docs/ref/databases.txt
@@ -40,6 +40,10 @@ database connection at the end of each request. To enable persistent
 connections, set :setting:`CONN_MAX_AGE` to a positive integer of seconds. For
 unlimited persistent connections, set it to ``None``.
 
+When using ASGI, persistent connections should be disabled. Instead, use your
+database backend's built-in connection pooling if available, or investigate a
+third-party connection pooling option if required.
+
 Connection management
 ~~~~~~~~~~~~~~~~~~~~~
 
diff --git a/docs/topics/async.txt b/docs/topics/async.txt
index 87550ff46d..204d79fc8c 100644
--- a/docs/topics/async.txt
+++ b/docs/topics/async.txt
@@ -148,6 +148,11 @@ Transactions do not yet work in async mode. If you have a piece of code that
 needs transactions behavior, we recommend you write that piece as a single
 synchronous function and call it using :func:`sync_to_async`.
 
+:ref:`Persistent database connections <persistent-database-connections>`, set
+via the :setting:`CONN_MAX_AGE` setting, should also be disabled in async mode.
+Instead, use your database backend's built-in connection pooling if available,
+or investigate a third-party connection pooling option if required.
+
 .. _async_performance:
 
 Performance