sqlalchemy.exc.TimeoutError: QueuePool limit of size 5 overflow 10 reached, connection timed out, timeout 30.00

Hello pgadmin team,

a few days ago we got the following error in our production environment which occurred every few minutes until the pod was restarted. We are running the official Docker image with pgadmin version 6.20.

sqlalchemy.exc.TimeoutError: QueuePool limit of size 5 overflow 10 reached, connection timed out, timeout 30.00 (Background on this error at: https://sqlalche.me/e/14/3o7r)
2023-04-18 12:34:30,738: ERRORpgadmin:QueuePool limit of size 5 overflow 10 reached, connection timed out, timeout 30.00 (Background on this error at: https://sqlalche.me/e/14/3o7r)
Traceback (most recent call last):
File "/venv/lib/python3.10/site-packages/flask/app.py", line 1515, in full_dispatch_request
rv = self.preprocess_request()
File "/venv/lib/python3.10/site-packages/flask/app.py", line 1857, in preprocess_request
rv = self.ensure_sync(before_func)()
File "/venv/lib/python3.10/site-packages/flask_principal.py", line 477, in _on_before_request
identity = loader()
File "/venv/lib/python3.10/site-packages/flask_security/core.py", line 535, in _identity_loader
if not isinstance(current_user._get_current_object(), AnonymousUserMixin):
File "/venv/lib/python3.10/site-packages/werkzeug/local.py", line 407, in _get_current_object
return self.__local() # type: ignore
File "/venv/lib/python3.10/site-packages/flask_login/utils.py", line 25, in <lambda>
current_user = LocalProxy(lambda: _get_user())
File "/venv/lib/python3.10/site-packages/flask_login/utils.py", line 372, in _get_user
current_app.login_manager._load_user()
File "/venv/lib/python3.10/site-packages/flask_login/login_manager.py", line 364, in _load_user
user = self._user_callback(user_id)
File "/venv/lib/python3.10/site-packages/flask_security/core.py", line 465, in _user_loader
user = _security.datastore.find_user(fs_uniquifier=str(user_id))
File "/venv/lib/python3.10/site-packages/flask_security/datastore.py", line 587, in find_user
return query.filter_by(**kwargs).first()
File "/venv/lib/python3.10/site-packages/sqlalchemy/orm/query.py", line 2824, in first
return self.limit(1)._iter().first()
File "/venv/lib/python3.10/site-packages/sqlalchemy/orm/query.py", line 2916, in _iter
result = self.session.execute(
File "/venv/lib/python3.10/site-packages/sqlalchemy/orm/session.py", line 1713, in execute
conn = self._connection_for_bind(bind)
File "/venv/lib/python3.10/site-packages/sqlalchemy/orm/session.py", line 1552, in _connection_for_bind
return self._transaction._connection_for_bind(
File "/venv/lib/python3.10/site-packages/sqlalchemy/orm/session.py", line 747, in _connection_for_bind
conn = bind.connect()
File "/venv/lib/python3.10/site-packages/sqlalchemy/engine/base.py", line 3315, in connect
return self._connection_cls(self, close_with_result=close_with_result)
File "/venv/lib/python3.10/site-packages/sqlalchemy/engine/base.py", line 96, in __init__
else engine.raw_connection()
File "/venv/lib/python3.10/site-packages/sqlalchemy/engine/base.py", line 3394, in raw_connection
return self._wrap_pool_connect(self.pool.connect, _connection)
File "/venv/lib/python3.10/site-packages/sqlalchemy/engine/base.py", line 3361, in _wrap_pool_connect
return fn()
File "/venv/lib/python3.10/site-packages/sqlalchemy/pool/base.py", line 327, in connect
return _ConnectionFairy._checkout(self)
File "/venv/lib/python3.10/site-packages/sqlalchemy/pool/base.py", line 894, in _checkout
fairy = _ConnectionRecord.checkout(pool)
File "/venv/lib/python3.10/site-packages/sqlalchemy/pool/base.py", line 493, in checkout
rec = pool._do_get()
File "/venv/lib/python3.10/site-packages/sqlalchemy/pool/impl.py", line 134, in _do_get
raise exc.TimeoutError(

Do you have any idea what could cause connections not to be released? Would it be a good idea to increase the QueuePool limit? If so, how can I configure the limit in pgadmin?

Thanks for your help in advance!

Best regards,
Tobias
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