python - Django not reusing connections to MySQL with CONN_MAX_AGE=60 -

i using django 1.9.2 in development (debug=true) mysql 5.6.23. below database settings

databases = {     'default': {         'engine': 'django.db.backends.mysql',         'name': 'dbname',         'user': "django",         'password': 'password',         'host': 'localhost',         'port': '3306',         'conn_max_age': 60,     } } 

i querying mysql number of active connections command below:

show status `variable_name` = 'threads_connected'; 

it yield result

+-------------------+-------+ | variable_name     | value | +-------------------+-------+ | threads_connected | 10    | +-------------------+-------+ 1 row in set (0,00 sec) 

every time make new request django, number of connected threads increase until (1040, 'too many connections') when number threads_connected=151. furthermore, connections not closed after 60s.

this behavior not seem happen in production (debug=false).