Why is it so important to close connections to databases if there’s no explicit need to keep them open (which usually the case)?
- Icinga reports high usage of allowed connections (>90%) on master MySQL server.
- No running queries or any specific in processlist. All the connections are sleeping … Continue reading
I always hear newer and newer exotic way to store different types of data in MySQL. People are trying to solve the problem of storing complex and not necessary strictly structured data in databases which is fine. But I never understood why to try to be tricky with the simplest … Continue reading
Last week one of my collagues came to me with the following problem. He was not able to create an innodb table. MySQL returned ERROR 1005: Can’t create table (errno: -1). Most of the times this problem is a foreign key related issue but now this wasn’t the case (Foreign key error will return … Continue reading
The story happened with a webshop application running on Amazon EC2 microinstances. Actually on two instance. Amazon business model is basically simple, they ask money for only three things: Cpu time, IOPS and network traffic. Everybody (including me) thinks for the first time network traffic will be the bottleneck until … Continue reading