Recently I had a customer where every single query was running in a transaction, as well as even the simplest selects. Unfortunately, this is not unique and many connectors like Java love to do that.
In their case, the Java connector changed autocommit=off for the connection itself at the beginning, and as these were permanent […]
In this blog post, I am going to show why we have to be careful with stored functions in select list, as a single query can cause thousands of queries in the background if we aren’t cautious.
For this example, I am only going to use the SLEEP function to demonstrate the issue, but you […]
Recently I had a case where queries against Aurora Reader were 2-3 times slower than on the Writer node. In this blog post, we are going to discuss why.
I am not going to go into the details of how Aurora works, as there are
Recently, I encountered a situation where MySQL gave error messages that I had never seen before:
MySQL
2018-12-12T14:36:45.571440Z 0 [ERROR] Error log throttle: 150 ‘Can’t create thread to handle new connection’ error(s) suppressed
2018-12-12T14:36:45.571456Z 0 [ERROR] Can’t create thread to handle new connection(errno= 11)
2018-12-12T14:37:47.748575Z 0 [ERROR] Error log throttle: 940 ‘Can’t create thread to handle new connection’ […]
Recently, I’ve been working with a customer to evaluate the different cloud solutions for MySQL. In this post I am going to focus on maintenance windows and requirements, and what the different cloud platforms offer.
Why is this important at all?
Maintenance windows are required so that the cloud provider can do the necessary updates, patches, and […]
