MySQL Connector/Python and database pooling

MySQL Connector/Python is (or should be) compliant with the Python DB-API 2.0 specification. This means that you can use DBUtils' PooledDB module to implement database connection pooling.

Here below you'll find an example which will output the connection ID of each connection requested through the pooling mechanism.

from DBUtils.PooledDB import PooledDB
import mysql.connector

def main():
    pool_size = 3
    pool = PooledDB(mysql.connector, pool_size,
        database='test', user='root', host='127.0.0.1')
    
    cnx = [None,] * pool_size
    for i in xrange(0,pool_size):
        cnx[i] = pool.connection()
        cur = cnx[i].cursor()
        cur.execute("SELECT CONNECTION_ID()")
        print "Cnx %d has ID %d" % (i+1,cur.fetchone()[0])
        cur.close()
    
    for c in cnx:
        c.close()

The output will be something like this:

Cnx 1 has ID 42
Cnx 2 has ID 41
Cnx 3 has ID 40

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