Add ia DB connection pool using gevent to django
Project description
Another DB pool using gevent for PostgreSQL DB.
Need Django 1.5.x or Django 1.6.x
Patch psycopg2
Before using the pool, psycopg2 must be patched with psycogreen, if you are using gunicorn webserver, a good place is the post_fork() function at the config file
from psycogreen.gevent import patch_psycopg
def post_fork(server, worker):
patch_psycopg()
worker.log_info("Made Psycopg2 Green")
Settings
Set ENGINE in your database settings to: ‘django_db_geventpool.backends.postgresql_psycopg2’
Add MAX_CONNS to OPTIONS to set the maximun number of connections allowed to database (default=4)
If using django 1.6 or newer, add CONN_MAX_AGE: 0 to settings to disable default django persistent connection feature.
# for django 1.5.x
DATABASES = {
'default': {
'ENGINE': 'django_db_geventpool.backends.postgresql_psycopg2',
'NAME': 'db', # Or path to database file if using sqlite3.
'USER': 'postgres', # Not used with sqlite3.
'PASSWORD': 'postgres', # Not used with sqlite3.
'HOST': '', # Set to empty string for localhost. Not used with sqlite3.
'PORT': '', # Set to empty string for default. Not used with sqlite3.
'OPTIONS': {
'MAX_CONNS': 20
}
}
}
# for django 1.6 and newer version, CONN_MAX_AGE must be set to 0, or connections will never go back to the pool
DATABASES = {
'default': {
'ENGINE': 'django_db_geventpool.backends.postgresql_psycopg2',
'NAME': 'db',
'USER': 'postgres',
'PASSWORD': 'postgres',
'HOST': '',
'PORT': '',
'ATOMIC_REQUESTS': False,
'AUTOCOMMIT': True,
'CONN_MAX_AGE': 0,
'OPTIONS': {
'MAX_CONNS': 20
}
}
}
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