MySQLi error 2 Too many connections is thrown on our Centos server.
I am testing the application by simulating a ton of requests from another external server.
In my application, I am creating the connection only once. And then reusing it by passing $glob_conn as a global variable inside functions.
I've checked and tried some suggestions online:
Setting /proc/sys/net/ipv4/tcp_fin_timeout to 3 (from 60)
Then made the connection persistent:
$glob_conn = new mysqli(p:127.0.0.1, config_mysql_db_user, config_mysql_db_password, 'uni_partner');
As you can see there are not many connections waiting:
# netstat -anlp | grep :3306 | grep TIME_WAIT -wc
2
# netstat -anlp | grep :3306 | grep ESTABLISHED -wc
304
All to no avail. When I introduce a lot of clients, the same error is returned.