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6
votes
1answer
4k views

What are user connections - when are the created and destroyed?

We've been getting an intermittent error on out site: Warning: mysql_connect() [function.mysql-connect]: User '557574_prod' has exceeded the 'max_user_connections' resource (current value: 10) ...
7
votes
1answer
42k views

How to get rid of “maximum user connections” error ?

I am using MySQLi for my webapp but whenever I want to visit some particular page, I get mysqli_connect() [function.mysqli-connect]: (42000/1203): User ***_user already has more than ...
24
votes
3answers
23k views

How do you calculate mysql max_connections variable?

How do you calculate mysql max_connections ? What do you take into consideration ?
5
votes
1answer
699 views

How many users are supported on SQL Server 2012 Express?

I would like to say that i have gone through some of the sql blog and MSDN BOL, but still there is some confusion in mind like. The limitation of SQL Server 2012 Express is 10 GB. It is the ...
1
vote
1answer
2k views

Show processlist / Max concurrent connections seem to max out at 131

When I put my database under a load test (basically just a basic write and basic read from our app), and run show processlist; in the middle of it, there is always 131 rows in the set and that's it. ...
5
votes
3answers
794 views

How to understand the PostgreSQL discrepancy between connection pool recommendation ((2 * n_cores) + n_disks) and support for 100s of connections?

From PostgreSQL docs: Number of Database Connections -> How to Find the Optimal Database Connection Pool Size for optimal throughput the number of active connections should be somewhere near ...
2
votes
1answer
5k views

pt-heartbeat showing “Host is blocked because of many connection errors”…but connections are well under limit

I'm running MySQL in a master-slave configuration. pt-heartbeat is showing "Host is blocked because of many connection errors"...but connections are well under limit (limit is 600 connections, MySQL ...
1
vote
2answers
1k views

multiple connections on MySQL database with no users on httpd

My database seems to have many open connections despite having no users on httpd. mysql> SHOW PROCESSLIST; ...